Steel circle GOST 2590-2006 (GOST 2590-88) hot-rolled round steel (hot-rolled steel circle) supplied by State Enterprise "Stalmash":
According to precision, a steel circle is made:
- AO - especially high precision (AO1);
- A - high accuracy (A1, A2, A3);
- B - increased accuracy (B1);
- B - normal accuracy (B1, B2, B3, B4, B5).
The steel circle is made in rods.
In accordance with the order, a steel circle is produced
:
- measured length;
- multiple measured length;
- unmeasured multiple length.
(it is possible to comply with additional requirements for rolled product quality and steel quality).
The steel circle is made in length
:
- from 2 to 6 m - a circle made of ordinary quality carbon steel and a circle made of low-alloy steel;
- from 2 to 6 m - a circle made of high-quality carbon steel and a circle made of alloy steel;
- from 1.0 to 6 m - circle made of high-alloy steel.
Maximum deviations in the length of rolled stock of cut and multiple cut lengths must not exceed:
- +30 mm - for lengths up to 4 m inclusive;
- +50 mm - for lengths over 4 m up to 6 m inclusive.
- +70 mm - for lengths over 6 m.
Hot-rolled steel circles are supplied in more than 250 grades of high-quality structural alloy and carbon steels in accordance with the following regulatory and technical documentation:
GOST 4543-2016, GOST 19281-2014, GOST 5632-72, GOST 5949-75, GOST 1414-75, GOST 1435-99, GOST 20072-74, GOST 14959-79, GOST 801-78, GOST 5950-2000, GOST V 10230-74, GOST 4728-99, GOST 10884-74, GOST 1050-2013 and other GOST, TU (technical conditions), TS (technical agreement), OST (industry standard) ...
The marking (designation) of a hot-rolled rod is carried out by two GOSTs, the 1st GOST indicates the type of rolled product (in our case 2590-2006 - hot-rolled steel circle), the 2nd indicates the grade of steel from which this rod is made...
The steel bar is supplied in lengths of 2 - 6 meters; it is possible to supply steel bars of other lengths, up to 11.7 meters (not all diameters).
We ship steel rods from a warehouse in Yekaterinburg [from availability from 100 kg throughout Russia, high-alloy steel from 30 kg]:
- for pickup,
- containers,
- carriages,
- shipping by road transport companies throughout Russia,
- shipment through railway forwarding.
ATTENTION
: When sending an order, we ask you (as much as possible) to indicate the parameters of the metal products you are interested in:
1
. Mark-profile-size (Circle, hexagon, strip..., Rolled dimensions, Steel grade)
2
. The quantity of rolled metal you are interested in (kg, tons)
3
. The contact person
4
. Name of the Enterprise, Company indicating the form of ownership
5
. Metal shipment region
6
. Your proposed method of shipment (pickup, container, wagon, trucking company, through railway forwarding, for pickup...)
STATE STANDARD OF THE USSR UNION
HOT-ROLLED ROUND STEEL
ASSORTMENT
GOST 2590-88
(ST SEV 3898-82)
USSR STATE COMMITTEE ON STANDARDS
Moscow
STATE STANDARD OF THE USSR UNION
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HOT-ROLLED ROUND STEEL AssortmentRound steel bars. Dimensions |
GOST
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Validity from 01.01.90
until 01/01/95
1. This standard applies to hot-rolled round steel with a diameter from 5 to 270 mm inclusive.
Rolled products with a diameter of more than 270 mm are produced by agreement between the manufacturer and the consumer.
2. Rolled products are manufactured according to precision:
A - high accuracy;
B - increased accuracy;
B - normal accuracy.
3. The diameter of the rolled product, the maximum deviations along it, the cross-sectional area and the weight of 1 m of length must correspond to those indicated in the drawing and in the table. 1 .
Table 1
|
Diameter d, mm |
Maximum deviations, mm, with rolling accuracy |
Cross-sectional area, cm 2 |
Weight of 1 m profile, kg |
||
Notes:
1. The cross-sectional area and mass of 1 m of profile length are calculated based on the nominal dimensions. When calculating the mass of 1 m of rolled steel, the steel density was taken to be 7.85 g/cm 3 . The weight of 1 m of rolled stock is a reference value.
2. For rolled products with a diameter of up to 9 mm inclusive, produced in coils on mills not equipped with finishing blocks, maximum diameter deviations of no more than ± 0.5 mm are allowed until 01/01/92.
3. Maximum deviations in the diameter of round rolled products intended for the production of calibrated rolled products can be symmetrical, but must not exceed the established tolerance fields.
4. By agreement between the manufacturer and the consumer, rods with a diameter of over 100 mm are manufactured in intermediate sizes with maximum deviations for the nearest smaller size.
4. At the request of the consumer, round products are manufactured with positive deviations indicated in the table. 2.
Table 2
mm
5. The ovality of rolled products should not exceed 50% of the sum of the maximum deviations in diameter.
Allowed for alloyed tool and high-speed rolled products is ovality not exceeding 60% of the sum of the maximum deviations in diameter.
6. Rolled products with a diameter of up to 9 mm are produced in coils, over 9 mm - in rods.
By agreement between the manufacturer and the consumer, it is allowed to produce rolled products with a diameter of more than 9 mm in coils, and less than 9 mm in rods.
7. In accordance with the order, rental products are manufactured:
measured length;
multiple measured length;
of unmeasured length.
8. Rolled products are made in length:
from 2 to 12 m - from ordinary carbon and low-alloy steel;
from 2 to 6 m - from high-quality carbon and alloy steel;
from 1.0 to 6 m - made of high-alloy steel.
9. At the request of the consumer, rolled products are manufactured in lengths from 2 to 24 m.
10. Maximum deviations in the length of rolled stock of cut and multiple cut lengths must not exceed:
30 mm - for lengths up to 4 m inclusive;
50 mm - with a length of St. 4 m to 6 m inclusive;
70 mm - for lengths over 6 m.
At the request of the consumer, maximum deviations should not exceed:
40 mm - for rental with a length of St. 4 to 7 m;
5 mm for each meter of length - over 7 m.
11. The curvature of round bars should not exceed the values indicated in the table. 3.
Table 3
mm
12. At the request of the consumer, the curvature of round bars should not exceed 0.2% of the length.
13. The curvature of rolled products is measured over a length of at least 1 m at a distance of at least 150 mm from the ends.
14. The diameter and ovality of round bars are measured at a distance of at least 150 mm from the end of the bar and at least 1.5 m from the end of the coil when its weight is up to 250 kg and at a distance of at least 3.0 m when the coil weighs over 250 kg.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the USSR State Committee for Standards
PERFORMERS
K. F. Peretyatko, G. I. Snimshchikova (topic leaders); S. I. Rudyuk, Ph.D. tech. sciences; V. F. Kovalenko, Ph.D. tech. sciences; Kh. M. Saprykin, Ph.D. tech. sciences; V. A. Ena, Ph.D. tech. sciences; E. I. Bulgakov; Zh. M. Roeva, Ph.D. economy sciences; V. I. Krasnova; I. E. Patseka, Ph.D. tech. sciences
Valid from 01/01/90
until 01/01/95
1. This standard applies to hot-rolled round steel with a diameter from 5 to 270 mm inclusive.
Rolled products with a diameter of more than 270 mm are produced by agreement between the manufacturer and the consumer.
2. Rolled products are manufactured according to precision:
A - high accuracy;
B - increased accuracy;
B - normal accuracy.
3. The diameter of the rolled product, the maximum deviations along it, the cross-sectional area and the weight of 1 m of length must correspond to those indicated in the drawing and in the table. 1.
Table 1
|
Diameter d, mm |
Maximum deviations, mm, with rolling accuracy |
Cross-sectional area, cm 2 |
Weight of 1 m profile, kg |
||
Notes:
1. The cross-sectional area and mass of 1 m of profile length are calculated based on the nominal dimensions. When calculating the mass of 1 m of rolled steel, the steel density was taken to be 7.85 g/cm 3 . The weight of 1 m of rolled stock is a reference value.
2. For rolled products with a diameter of up to 9 mm inclusive, produced in coils on mills not equipped with finishing blocks, maximum diameter deviations of no more than ± 0.5 mm are allowed until 01/01/92.
3. Maximum deviations in the diameter of round rolled products intended for the production of calibrated rolled products can be symmetrical, but must not exceed the established tolerance fields.
4. By agreement between the manufacturer and the consumer, rods with a diameter of over 100 mm are manufactured in intermediate sizes with maximum deviations for the nearest smaller size.
4. At the request of the consumer, round products are manufactured with positive deviations indicated in the table. 2.
table 2
5. The ovality of rolled products should not exceed 50% of the sum of the maximum deviations in diameter.
Allowed for alloyed tool and high-speed rolled products is ovality not exceeding 60% of the sum of the maximum deviations in diameter.
6. Rolled products with a diameter of up to 9 mm are produced in coils, over 9 mm - in rods.
By agreement between the manufacturer and the consumer, it is allowed to produce rolled products with a diameter of more than 9 mm in coils, and less than 9 mm in rods.
7. In accordance with the order, rental products are manufactured:
measured length;
multiple measured length;
of unmeasured length.
8. Rolled products are made in length:
from 2 to 12 m - from ordinary carbon and low-alloy steel;
from 2 to 6 m - from high-quality carbon and alloy steel;
from 1.0 to 6 m - made of high-alloy steel.
9. At the request of the consumer, rolled products are manufactured in lengths from 2 to 24 m.
10. Maximum deviations in the length of rolled stock of cut and multiple cut lengths must not exceed:
30 mm - for lengths up to 4 m inclusive;
50 mm - with a length of St. 4 m to 6 m inclusive;
70 mm - for lengths over 6 m.
At the request of the consumer, maximum deviations should not exceed:
40 mm - for rental with a length of St. 4 to 7 m;
5 mm for each meter of length - over 7 m.
11. The curvature of round bars should not exceed the values indicated in the table. 3.
Table 3
12. At the request of the consumer, the curvature of round bars should not exceed 0.2% of the length.
13. The curvature of rolled products is measured over a length of at least 1 m at a distance of at least 150 mm from the ends.
14. The diameter and ovality of round bars are measured at a distance of at least 150 mm from the end of the bar and at least 1.5 m from the end of the coil when its weight is up to 250 kg and at a distance of at least 3.0 m when the coil weighs over 250 kg.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the USSR State Committee for Standards
PERFORMERS
K. F. Peretyatko, G. I. Snimshchikova (topic leaders); S. I. Rudyuk, Ph.D. tech. sciences; V. F. Kovalenko, Ph.D. tech. sciences; Kh. M. Saprykin, Ph.D. tech. sciences; V. A. Ena, Ph.D. tech. sciences; E. I. Bulgakov; Zh. M. Roeva, Ph.D. economy sciences; V. I. Krasnova; I. E. Patseka, Ph.D. tech. sciences
INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION
INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION
INTERSTATE
STANDARD
Assortment
(EN 10060:2003, NEQ)
Official publication
Standardinform
Preface
The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system. Basic provisions" and GOST 1.2-97 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Procedure for development, adoption, application, updating and cancellation"
Standard information
1 DEVELOPED by the research institute “UkrNIIMet” of the Ukrainian State Scientific and Technical Center “Energostal”, Interstate Technical Committee for Standardization MTK 327 “Rolled bars, shaped and special profiles”
2 INTRODUCED by the State Committee of Ukraine on Technical Regulation and Consumer Policy
3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Protocol No. 30 of December 7, 2006)
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Short name of the country according to MK (ISO 3166) 004-97 |
Code of the country according to MK (ISO 3166) 004-97 |
Abbreviated name of the national standardization body |
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Azerbaijan |
Azstandard |
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Ministry of Trade and Economic Development |
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Belarus |
State Standard of the Republic of Belarus |
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Kazakhstan |
Gosstandart of the Republic of Kazakhstan |
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Kyrgyzstan |
Kyrgyzstandard |
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Moldova-Standard |
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Russian Federation |
Federal Agency for Technical Regulation |
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knowledge and metrology |
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Tajikistan |
Tajikstandard |
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The Republic of Uzbekistan |
Uzstandard |
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G ospotrebstandart of Ukraine |
4 This standard corresponds to the regional standard EN 10060:2003 “Hot-rolled round steel bars for general purposes”. Dimensions and maximum deviations on shape and dimensions" (EN 10060:2003 "Hot rolled round steel bars for general purposes - Dimensions and tolerances on shape and dimensions") regarding the requirements for the assortment.
Degree of conformity - nonequivalent (NEC)
5 By Order of the Federal Agency for Technical Regulation and Metrology dated July 29, 2008 No. 147-st, the interstate standard GOST 2590-2006 was put into effect as a national standard of the Russian Federation on July 1, 2009.
6 INSTEAD GOST 2590-88
7 REPUBLICATION. January 2010
Information on the entry into force (termination) of this standard is published in the “National Standards” index.
Information about changes to this standard is published in the “National Standards” index, and the text of the changes is published in the “National Standards” information indexes. In case of revision or cancellation of this standard, the relevant information will be published in the information index “National Standards”
© Standartinform, 2008 © STANDARDINFORM, 2010
In the Russian Federation, this standard cannot be fully or partially reproduced, replicated and distributed as an official publication without permission from the Federal Agency for Technical Regulation and Metrology
INTERSTATE STANDARD
HOT-ROLLED ROUND STEEL
Assortment
Round hot-rolled steel bars. Dimensions
Date of introduction - 2009-07-01
1 area of use
This standard applies to hot-rolled steel bars of round section (hereinafter referred to as rolled products) with a diameter from 5 to 270 mm inclusive, which is used in all industries.
Rolled products with a diameter over 270 to 330 mm inclusive are manufactured by agreement between the manufacturer and the consumer (according to the agreed specification).
2 Classification. Main parameters and dimensions
2.1 Rentals are divided into:
Rolling thread: especially high - A01; high - A1, A2, AZ; increased - B1; regular - B1, B2, VZ, B4, B5;
Authenticity: measured - MD;
measured with unmeasured length - MD1 1 >; multiple dimensional - CD; multiple measured with unmeasured length - KD1 1 >; unmeasured - ND;
limited within unmeasured limits - OD; limited with unmeasured length - OD1 1); in skeins - NMD;
According to maximum deviations in the length of rolled stock of cut and multiple cut lengths by groups: BD
By curvature into classes: I, II, III, IV.
2.2 The nominal diameter of the rolled product, maximum deviations along it, cross-sectional area and weight of 1 m length of the rolled product must correspond to those indicated in Figure 1 and Table 1.
"When supplying rolled products of measured length with unmeasured length (MD1), multiples of rolled stock with unmeasured length (KD 1) and limited rolled products with unmeasured length (OD1), the presence of rolled stock of unmeasured length is allowed in an amount of no more than 5% of the batch weight.
Official publication
Picture 1
Table 1
|
Nominal diameter d, mm |
Maximum deviation, |
mm, with rolling accuracy |
transverse | |||||
|
rolled products, kg |
||||||||
Continuation of Table 1
|
Nominal diameter d, mm |
Maximum deviation, mm, with rolling accuracy |
transverse | ||||||
|
rolled products, kg |
||||||||
End of table 1
1) By agreement between the manufacturer and the consumer (according to the agreed specification).
Notes
1 The cross-sectional area and weight of 1 m of rolled length are calculated based on the nominal dimensions. When calculating the mass of 1 m of rolled stock, the steel density was taken to be 7.85 g/cm 3 . The weight of 1 m length of rolled stock and the cross-sectional area of rolled stock are reference values.
2 By agreement between the manufacturer and the consumer (according to the agreed specification), rolled products are manufactured of intermediate sizes with maximum deviations along the nearest smaller diameter.
3 For rolled products with a diameter of up to 9 mm inclusive, produced in coils on mills not equipped with finishing blocks, maximum diameter deviations of no more than ± 0.5 mm are allowed (B4).
2.2.1 Rolled products with rolling accuracy A2 and B2 (Table 1) may be manufactured with positive maximum deviations equal in value to the sum of the maximum deviations in diameter (AZ and VZ).
2.3 By agreement between the manufacturer and the consumer (according to the agreed specification), it is allowed to produce rolled products with a diameter of over 270 to 300 mm inclusive with maximum deviations of + 6.0 mm, over 300 to 330 mm inclusive with maximum deviations of + 7.0 mm.
2.4 By agreement between the manufacturer and the consumer (according to the agreed specification), rolled products are manufactured with positive maximum deviations in diameter (B5) indicated in Table 2.
table 2
In millimeters
2.5 The ovality of rolled products should not exceed 75% of the sum of the maximum deviations in diameter. At the request of the consumer (according to the agreed specification), the ovality of rolled products is no more than
50% of the sum of maximum deviations in diameter and no more than 60% of the sum of maximum deviations in diameter for rolled products made of alloy tool and high-speed steel.
2.6 Rolled products with a diameter of up to 9 mm inclusive are produced in coils, above mm - in rods.
By agreement between the manufacturer and the consumer (according to the agreed specification), rolled products with a diameter of more than 9 mm are produced in coils and less than 9 mm inclusive - in bars.
2.7 Rolled products are made in length:
from 2 to 12 m inclusive - from carbon steel of ordinary quality and low-alloy steel;
from 2 to 6 m inclusive - from high-quality carbon and alloy steel; from 1 to 6 m inclusive - made of high-alloy steel.
By agreement between the manufacturer and the consumer (according to the agreed specification), rolled products are manufactured in unmeasured lengths ranging from 3 to 13 m inclusive, while 10% of the bars by weight of the batch may have a shorter length, but not less than 75% of the minimum length.
2.8 Maximum deviations for the manufactured length of rolled stock of cut and multiple cut lengths must not exceed the values specified in Table 3.
Table 3
2.9 The curvature of the rolled product should not exceed the values indicated in Table 4.
Table 4
1 * At the request of the consumer (according to the agreed specification).
2.10 The curvature of the rolled product is measured over a section of at least 1 m in length at a distance of at least 100 mm from the end of the bar.
2.11 The diameter and ovality of rolled products are measured at a distance of at least 100 mm from the end of the bar and at least 1.5 m from the end of the coil when its weight is up to 250 kg and at a distance of at least 3.0 m when the coil weighs over 250 kg.
2.11.1 By agreement between the manufacturer and the consumer (according to the agreed specification), the diameter, ovality and curvature of the rolled product are measured at a distance of at least 150 mm from the end of the bar.
UDC 669.14-122:006.354 MKS 77.140.60 V22
Key words: rolled round section, parameters and dimensions, manufacturing accuracy, maximum deviations, curvature, ovality
Editor N.V. Talanova Technical editor V.N. Prusakova Proofreader L. S. Chernousova Computer layout IL. Naleykina
Signed for publication on 02/05/2010. Format 60x84%. Offset paper. Arial typeface. Offset printing. Uel. oven l. 1.40. Academic ed. l. 0.80. Circulation 185 copies. Zach. 82.
FSUE "STANDARTINFORM", 123995 Moscow, Granatny lane, 4.
Typed into FSUE "STANDARTINFORM" on a PC
Printed in the branch of FSUE "STANDARTINFORM" - type. "Moscow Printer", 105062 Moscow, Lyalin lane, 6.
“Carbon steel is of ordinary quality. Stamps"
According to the production method, a steel circle can be:
· Hot rolled (with and without special surface finishing);
· Forged;
· Calibrated (with and without special surface finishing);
Made from ordinary quality carbon steel hot rolled circle. Manufactured from alloyed structural steel without heat treatment and heat treated - TO (annealed, highly tempered, normalized or normalized with high tempering). hot rolled And forged circles.
Calibrated the circle can be cold-rolled or cold-drawn, made of high-quality carbon or alloy steel, processed by cold drawing with compression to improve resistance to mechanical stress and increase physical and plastic properties, and is cold-worked - H or heat-treated - T (annealed, normalized, hardened and tempered ).
Hot-rolled and calibrated wheels can be produced with a special surface finish: the quality of the steel surface is achieved by removing the surface layer (grinding, turning, roughing followed by polishing, rolling, etc.).
At the consumer’s request, a steel circle can be manufactured with a guarantee of weldability “sw”, which is ensured by the chemical composition and manufacturing technology.
The main components that make up the alloys used for the production of products, and the percentage of these components, as well as the grades of alloys are indicated in Table 1.
Table 1
Grades and chemical composition of steels for the manufacture of steel circles
Steel group | Mass fraction of elements, % | ||||||||||
Manganese | Molybdenum | Aluminum | |||||||||
Carbon steel of ordinary quality | |||||||||||
St0, St1kp, St1ps, St1sp, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp, St3Gps, St3Gsp, St4kp, St4ps, St4sp, St5ps, St5sp, St5Gps, St6ps | |||||||||||
Alloy structural steel | |||||||||||
Chrome | 15X, 15XA, 20X, 30X, 30XRA, 35X, 38XA, 40X, 45X, 50X | ||||||||||
Manganese | 15G, 20G, 25G, 30G, 35G, 40G, 45G, 50G, 40GR, 10G2, 30G2, 35G2, 40G2, 45G2, 50G2, 47GT | ||||||||||
Chromomanganese | 18ХГ, 18ХГТ, 25ХГТ, 30ХГТ, 27ХГР, 40ХГТР, 25ХГМ, 38ХГМ | ||||||||||
Chrome-silicon | 33ХС, 38ХС, 40ХС | ||||||||||
Chrome-molybdenum and chrome-molybdenum-vanadium | 15ХМ, 20ХМ, 30ХМ, 30ХМА, 35ХМ, 38ХМ, 30Х3МФ, 40ХМФА | ||||||||||
Chrome vanadium | 15HF, 40HFA | ||||||||||
Nickel-molybdenum | 15N2M (15NM) 20N2M (20NM) | ||||||||||
Chromium-nickel and chromium-nickel with boron | 12ХН, 20ХН 40ХН, 45ХН, 50ХН, 20ХНР, 12ХН2, 12ХН3А, 20ХН3А, 30ХН3А, 12Х2Н4А, 20Х2Н4А | ||||||||||
Chrome-silicon-manganese and chrome-silicon-manganese-nickel | 20KhGSA, 25KhGSA, 30KhGS, 30KhGSA, 35KhGSA, (30KhGSN2A) | ||||||||||
Chrome-margon-nickel and chrome-margon-nickel with titanium and boron | |||||||||||
(15KhGNTA), 20KhGNR, 20KhGNTR, 38KhGN, 14KhGN, 19KhGN | |||||||||||
Chromium-nickel-molybdenum | 20ХН2М (20ХНМ), 30ХН2МА (30ХНМА), 40ХН2МА (40ХНМА), 38Х2Н2МА (38ХНМА), 40Х2Н2МА (40ХНМА), 38ХН3МА, 18Х2Н4МА (18Х2Н4ВА), 25Х2Н4МА (25Х2Н4ВА) | ||||||||||
Chromium-nickel-molybdenum-vanadium and chromium-nickel-vanadium | 30ХН2МФА (30ХН2ВВА), 36ХН2Н2МВА (36ХН1МФА), 38ХН3МFA, 45ХН2МФА (45ХНММА), 20ХН4ФА | ||||||||||
Chromo-aluminum with molybdenum | 38Х2МУА (38ХМУА) | ||||||||||
Chromium-manganese-nickel with molybdenum and titanium | 20ХГНМ, 40ХГНМ, 25ХГНМТ | ||||||||||
* Structure of a carbon steel grade of ordinary quality: “St” - steel, numbers - conditional number of the grade depending on the chemical composition, “G” - manganese with its mass fraction in steel of 0.8% or more, degree of steel deoxidation: “kp” - boiling, "ps" - semi-calm, "sp" - calm.
In the designation of grades of alloy structural steel, the first two digits indicate the average mass fraction of carbon in hundredths of a percent:
P - boron, Yu - aluminum, C - silicon, T - titanium, F - vanadium, X - chromium,
G - manganese, N - nickel, M - molybdenum, V - tungsten.
The numbers after the letters indicate the approximate mass fraction of the alloying element in whole units (the absence of a number indicates that the brand contains less than 1.5% of this element). The quality of steel is indicated at the end of the brand name: with the letter A - high-quality, with the letter Ш separated by a dash - especially high-quality.
In the production of steel circles, the content of phosphorus, sulfur, and residual copper is allowed, in percentages not exceeding the values indicated in Table 2.
table 2 Phosphorus, sulfur and copper content in steel circle
Hot-rolled steel circles with a diameter of up to 9 mm and calibrated with a diameter of up to 5 mm according to standards are manufactured in coils, with larger diameters in rods. Forged is supplied only in rods, because... manufactured with a minimum diameter of 40 mm
Application
Carbon steel circle is widely used in construction. For example, products made from steel grade St3 are used to reinforce reinforced concrete structures. Due to its high ductility, a steel circle of small radius is used for the construction of fences and arc welding of structural elements. Stands and household hangers are produced from a range of steels St3, St4, St5. It is also used in various forged products to create decorative elements.
Alloy steel products have high performance properties, therefore they are used in construction in areas with more severe climates and low temperature conditions.
A steel circle made of structural steel, after appropriate processing, acquires properties such as increased flexibility and superhardness. Many machines and mechanisms use springs made from a similar steel circle.
Table 3 aboutdeviations along the diameter of the steel circle, mm
According to the length of the rod, the hot-rolled steel circle can be of the following lengths:
· measured - MD,
· measured with unmeasured length - MD1,
multiple dimensional - CD,
multiple with unmeasured length - KD1,
· unmeasured - ND,
· limited within unmeasured limits - OD,
· limited with unmeasured length - OD1,
· in skeins - NMD.
For types of steel circles with irregular lengths, the presence of rolled products of irregular length is allowed in a quantity of no more than 5% (for hot-rolled) and 10% (for calibrated) of the batch weight.
Maximum deviations for the manufactured length for hot-rolled and calibrated wheels of cut and multiple cut lengths depend on the length of the product: for a length up to 4 m inclusive, the maximum deviation is +30 mm, from 4 to 6 m - +50 mm, over 6 m - +50 mm (for calibrated) and +70 mm (for hot-rolled circle).
Maximum deviations in length for a forged circle depend on the diameter: +70 mm with a diameter of 40-80 mm, +100 mm with a diameter of 80-150 mm, +150 mm with a diameter over 150 mm.
The maximum curvature values for round steel rods are given in Table 4.
Table 4
Maximum curvature of a circle per 1 m length, %
A steel circle made of carbon steel of ordinary quality has several rolled categories, which differ from each other by a set of standardized indicators and the steel grades used. Table 5 shows the ratio of steel grades and rolled products categories.
Table 5 Categories of rolled carbon steel of ordinary quality
steel grade |
|
St0, St1pk, St1ps, St1sp, St2pk, St2ps, St2sp, St3pk, St3ps, St3sp, St4pk, St4ps, St4sp, St5ps, St5sp, St6ps, St6sp |
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St3pk, St3ps, St3sp, St3Gps, St4pk, St4ps, St4sp, St5ps, St5sp, St5Gps |
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St3ps, St3sp, St3Gps, St4ps, St4sp |
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St3ps, St3sp, St3Gps, St3Gsp |
Surface quality groups steel circle depend on the steel from which it is made. Hot-rolled carbon steel wheels of ordinary quality have surface quality groups, which are indicated in Table 6.
Table 6 Surface quality groups of ordinary quality carbon steel
Quality group | Characteristic | Application |
On the surface, without cleaning, there may be individual rolled out bubbles and dirt, ripples, imprints, risks, in which deviations from the diameter should be within normal limits. Other types of defects were removed by the manufacturer by gentle cleaning or cutting, in which the diameter deviations do not exceed those indicated in Table 3. | Can be used without surface treatment |
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Defects as in group 1GP are allowed without cleaning. Other types of defects are removed by gentle cleaning or cutting, the depth of which does not exceed: | Used for hot pressure treatment |
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For diameters less than 40 mm - the sum of maximum diameter deviations; |
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With a diameter of 40 mm to 140 mm - 5% of the diameter; |
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With a diameter over 140 mm - 8% of the diameter. |
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The depth of cleaning or cutting is calculated from the minimum size of the rolled product. |
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Defects the depth of which does not exceed: | Used for cold machining by cutting |
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For a diameter less than 100 mm - a negative value of the maximum deviation; |
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For a diameter of 100 mm and more - the sum of maximum deviations. |
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The depth of defects is calculated from the nominal size. |
Surface quality groups for a circle made of alloy structural steel are given in Table 7.
Table 7 Surface quality groups of alloy structural steel
Surface quality group | Diameter, mm | Depth of defect removal, no more | Defects allowed without cleaning |
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Made from quality and high quality steel | Made from particularly high-quality steel |
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6% diameter | 3% diameter | Single small risks, dents and ripples within half of the total maximum deviations. There are no hairs. |
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From 140 to 200 | 5% diameter | For a circle made of high-quality and high-quality steel of group 2, small hairs with a depth of no more than a quarter of the sum of the maximum deviations from the diameter are allowed, but not more than 0.2 mm. |
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From 80 to 140 | Sums of maximum deviation values | |||
Half the sum of maximum deviations | ||||
Depth of defects, no more |
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100 or more | The sums of maximum deviations are for wheels made of high-quality and high-quality steel; minus tolerance - for wheels made of especially high-quality steel |
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Minus tolerance |
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A circle made of calibrated steel has surface quality groups, which are given in Table 8.
Table 8 Surface quality groups of calibrated steel
Marking Symbol diagram for a steel circle: X 1 - manufacturing accuracy (accuracy class for hot-rolled - see table 3, quality for calibrated - see table 3, for forged - not indicated). X 2 - curvature, deviation from flatness (class I, II, III, IV; quality h). X 3 - diameter, mm. X 4 - designation of the standard for the assortment. X 5 - steel grade (see table 1). X 7 - surface quality group (see tables 6,7,8). X 8 - designation of the steel standard. Marking example: Hot-rolled round steel of normal rolling accuracy (B), curvature class II, with a diameter of 30 mm according to GOST 2590-2006, made of steel grade St5ps, category 1, group 1GP according to GOST 535-2005. Advantages · Circles made of structural steel (carbon and low-alloy) have good weldability, which is why they are widely used for the manufacture of building structures. “Rolled alloy structural steel. Technical specifications" "Ordinary quality carbon steel. Stamps" | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||