GOST 9045-93

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  ГОСТ 9045-93

GOST 9045−93 cold-rolled thin sheets of low carbon quality steel for cold forming. Specifications (with Change No. 1)

GOST 9045−93

Group B33

INTERSTATE STANDARD

COLD ROLLED LOW CARBON
HIGH-QUALITY STEEL FOR COLD FORMING

Specifications

Cold rolled thin sheets of low-carbon steel for cold stamping.
Specifications

ISS 77.140.20
OKP 09 7300

Date of introduction 1997−01−01

Preface

1 DEVELOPED by the Ministry of metallurgy

INTRODUCED by Gosstandart of Russia

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 3 dated February 17, 1993)

The adoption voted:

The name of the state	The name of the national authority standardization
The Republic Of Azerbaijan	Azgosstandart
The Republic Of Armenia	Armastajad
The Republic Of Belarus	Belstandart
The Republic Of Kazakhstan	Gosstandart Of The Republic Of Kazakhstan
The Republic Of Moldova	Moldovastandart
Russian Federation	Gosstandart Of Russia
The Republic Of Turkmenistan	Glavgosekspertiza Turkmenistan
The Republic Of Uzbekistan	Standards
Ukraine	Gosstandart Of Ukraine

3 In this standard introduced by the international standard ISO 3574−86 «cold-rolled Sheet steel, compressed in a cold condition, commercial quality and drawing» in CP3 and CP4

4 Decree of the Russian Federation Committee on standardization, Metrology and certification from 20.02.96 N 67 interstate standard GOST 9045−93 introduced directly as state standard of the Russian Federation from January 1, 1997

5 REPLACE GOST 9045−80

6 REISSUE


The Change N 1, approved and promulgated by the Order of Rosstandart on 10.02.2016 N 37 St c 01.07.2016

Change No. 1 made by the manufacturer of the database in the text IUS N 5, 2016

1 Scope of

This standard applies to cold rolled sheet of low-carbon steel with thickness up to 3.9 mm, intended for cold forming.

Additional requirements, relevant international standard ISO 3574−86 in part marks CP3 and CP4 in italics.

2 Normative references

The present standard features references to the following standards:

GOST 2789−73 surface Roughness. Parameters and characteristics

GOST 5639−82 of Steel and alloys. Methods of detection and determination of grain size

GOST 5640−68 Steel. Metallographic method for the evaluation of microstructure of sheets and strips

GOST 7564−97 hire. General rules of sample, blanks collection for mechanical and technological tests

GOST 7565−81 (ISO 377−2-89) Iron, steel and alloys. Sampling method for determination of chemical composition

GOST 7566−94 metal Products. Acceptance, marking, packing, transportation and storage

GOST 9013−59 (ISO 6508−86) Metals. Method of measuring Rockwell hardness

GOST 10510−80 (ISO 8490−86) Metals. Test method for the extrusion of sheets and strips for Eriksen

GOST 11701−84 Metals. Methods tensile tests of thin sheets and strips

GOST 19904−90 cold-rolled steel sheets. Assortment

GOST 21014−88 ferrous metals. Terms and definitions of defects

GOST 22536.0−87 carbon Steel and unalloyed cast iron. General requirements for methods of analysis

GOST 22536.1−88 carbon Steel and unalloyed cast iron. Methods for determination of total carbon and graphite

GOST 22536.2−87 carbon Steel and unalloyed cast iron. Methods of determining sulphur

GOST 22536.3−88 carbon Steel and unalloyed cast iron. Methods for determination of phosphorus

GOST 22536.4−88 carbon Steel and unalloyed cast iron. Methods for determination of silicon

GOST 22536.5−87 (ISO 629−82) carbon Steel and unalloyed cast iron. Methods for determination of manganese

GOST 22536.10−88 carbon Steel and unalloyed cast iron. Methods for determination of aluminium

GOST 22975−78 Metals and alloys. Method of measuring Rockwell hardness at low loads (for Super-Rockwell)

(Changed edition, Rev. N 1).

3 Assortment

3.1 the rent is divided:

— by product:

sheets, coils;

— normalized characteristics:

1, 2, 3, 4, 5;

— quality surface finishes on the group:

very high finishing — I*,

high finishing — II

advanced finishing — III (IIIA, IIIB);

— the ability to draw (rolled to 2 mm thick):

very particularly difficult — VOSV*, VOSV-T**,

particularly difficult — OSV,

complex — SV,

very deep — VG.
_______________
* At the request of the consumer.

** At the customer’s request with high technological properties.

3.2 In terms of assortment of hire must meet the requirements of GOST 19904.

3.3 Scheme of the legend of the rent is given in Appendix 1.

4 Technical requirements

4.1 Characteristics

4.1.1 rolled made of low-carbon steels.

Steel grades are given in Appendix 2.

4.1.1.1 steel grade is set by the manufacturer.

4.1.1.1 the Processes used in the production of steel and the manufacture of sheet steel, compressed in the cold state, depend on the choice of the manufacturer.

4.1.2 Categories of rentals depending on the normalized characteristics are shown in table 1.

Table 1

Category rental	Standard features					The ability to extract	The thickness of rolling, mm
	Yield strength	Temporary resistance	Relative elongation	Hardness	The depth of the spherical dimples
1	-	-	-	-	+	SV, VG	To 2.0
2	-	+	+	-	-	SV, VG, OSV	«3,9
3	-	+	+	-	+	OSV, SV, VG	«The 2.0
4	+	+	+	-	+	VOSV, VOSV-T, OSV, SV	«The 2.0
5	+	+	+	+	+	VOSV, VOSV-T, OSV, SV	«The 2.0

4.1.3 Mechanical properties of the rolled products shall conform to the requirements of table 2.

Table 2

			Hardness, of not more than
The ability to extract	Limit yield strength, N/mm(kgf/mm), no more	Temporary resistance , N/mm(kgf/mm)	Elongation , %, not less, when the thickness of the rolled				HR 15T	HR 30T	HRB
			when the thickness of the rolled
			less than 0.7 mm	from 0.7 to 1.5 mm incl.	St 1.5 to 2.0 mm incl.	St. 2.0 to 3.9 mm incl.	St. 0.5 to 0.8 mm incl.	St. 0.8 to 1.7 mm incl.	St. 1.7 to 2.0 mm incl.
OSV	195 (20)	250−350 (26−36)	34	36	40	42*	76	51	46
SV	205 (21)	250−380 (26−39)	32	34	38	40*	78	53	48
VG	-	250−390 (26−40)	26	28	29	30	-	-	-
* Before 01.01.99 optional, then the rule specified.

Table 2A — Requirements for mechanical properties of carbon steel sheet, compressed in a cold condition

Marking stamps	Application	Limit tensile strength* H/mm, not more	Elongation after fracture** , %, not less than, when calculated to the length of the sample		Hardness***, no more
			НRB	HR30T
			80 mm	50 mm
CR3	Deep drawing	350	34	35	53	52
CR4	Deep drawing special deoxidation (not aging)	340	36	37	50	50
* The minimum limit of tensile strength should normally be 270 N/mm. All the values of the limit of tensile strength are given with accuracy to the nearest 10 N/mm. ** For material thickness up to 0.6 mm inclusive, the values of elongation given in the table should be reduced by 1. Minimum values of elongation for the calculation of the length of the sample (initial cross — sectional area of sample) may be particularly specified stakeholders. *** Equivalent values of hardness Vickers also admitted to application in the case of coordination of stakeholders at the conclusion of the order. By agreement of interested parties requirements for hardness is allowed to stipulate. The hardness of sheet thinner than 0.6 mm shall be measured only in accordance with the scale HR30Т.

4.1.4. The depth of wells with the test extrusion must meet the requirements of table 3.

Table 3

In millimeters

The thickness of the rolled	The depth of the spherical dimples, at least, for rental of drawing ability
	OSV	SV	VG
0,4	9,0	8,8	8,6
0,5	9,4	9,2	9,0
0,6	9,8	9,6	9,4
0,7	10,2	10,0	9,7
0,8	10,6	10,4	10,0
0,9	10,9	10,6	10,3
1,0	11.1 V	10,8	10,5
1,1	11,3	11,0	10,8
1,2	11,5	11,2	11,0
1,3	11,7	11,4	11,2
1,4	11,8	11,5	11,3
1,5	11,9	11,6	11,5
1,6	12,0	11,7	11,6
1,7	12,1	11,9	11,8
1,8	12,2	12,0	11,9
1,9	12,3	12,1	12,0
2,0	12,4	12,2	12,1
Note For rental of intermediate thickness standards depth of a spherical hole to take the nearest lower thickness shown in table 3.

4.1.5 rental are made in heat-treated and dressirovka condition. By agreement between manufacturer and consumer hire are made in nedressirovanny condition, in this non-stripe a — line slip, stain adhesion welding and inflection, and the figures for the yield strength, the depth of the spherical dimples, relative elongation, flatness and roughness are not normalized.

4.1.6 the hire is manufactured from mill and cut edge.

On edges not allowed defects, the depth of which exceeds half of the limit deviations on width of rolled and deducing it for a nominal size width.

4.1.7 hire should not have curved corners, twisted the ends and edges at an angle more than 90° and folds. The length of the ends of the incomplete rolls of width not exceed the width of the roll.

4.1.8 Surface rental should be free of captivity, through tears, bubbles-bubbles, bubbles rolled out, stain adhesion welding, cuts, tears, katanoi scale, puretravel, neotravel, strip autofrettage, okatannyh metal and foreign particles.

Bundles are not allowed.

Characteristic of the quality of surface finish are given in table 4.

Table 4

The group finishes	Characteristics of surface finish quality
II	On both sides of the rental are not allowed defects, the depth of which exceeds ½ of the sum of limit deviations for thickness and for outputting the minimum dimensions in thickness and color of tint at a distance greater than 50 mm from edges. On the front side (top surface) are not allowed marks and scratches longer than 50mm
III	On both sides are not allowed defects, the depth of which exceeds ½ of the sum of limit deviations for thickness and deducing the rental for the minimum dimensions in thickness
	IIIa color tint is not allowed at a distance of 200 mm from the edges	IIIb the color of the tint permitted on the entire surface of the rolled

Determining the location of the front of the rental given in Annex 3.

4.1.8 and the State of the surface of sheet steel, compressed in the cold state, for the hood (CR3 and CR4) may be different in the case of closed and open parts.

The surface of sheet steel, intended for manufacturing of enclosed parts, may have pores, slight indentations, faint strokes or scratches, and slight discoloration.

The surface of sheet steel intended for the manufacture of exposed parts, should be relatively free from the above defects. Unless otherwise specified, inspection is subjected to only one side of the sheet.

Sheet steel, compressed in a cold condition, usually produce a Mat surface that is suitable for the following ordinary decorative painting, however, such steel is not recommended for electrochemical coatings.

When forming steel sheet, compressed in a cold condition, in the manufacture of parts may occur the deterioration of the surface of some localized areas that may require manual processing of these sites of the items for surface preparation for subsequent application of the product.

4.1.9 For rental of group III surface finish remove surface defects with fine-grained emery Stripping or felt around with emery paste. While on the surface rental allowed traces of abrasive Stripping, and the depth of Stripping should take the rental for a minimal thickness dimension.

4.1.10 the Amount of elongation and the depth of the spherical dimples rolled a very deep drawing, produced in dressirovka state, guaranteed by the manufacturer within 10 days from the date of shipment.

4.1.10 and the Values stated in table 2A are applicable to the period of time shown in table 4A, since the readiness of steel to delivery.

Table 4A

Marking stamps	Period
CR3	8 days
CR4	6 months

4.1.11 hire can be made without testing the mechanical properties, hoods and microstructure under the condition of stanoevski metal from the consumer.

4.2 Characteristics of performance that are installed at the customer’s request

4.2.1 rental with regulated chemical composition.

Rolled made of low-carbon steel grades:

— 08JU — the ability to extract VOSV, VOSV-T, OSV, SV;

— 08KP, 08ps — the ability to extract VG.

Allowed manufacture of hire ability to extract VG from steel grade 08JU.

4.2.2 the Chemical composition of the steel at plavonia analysis shall conform to the requirements of table 5.

Table 5

Mark steel	Mass fraction of elements, %
	carbon	manganese	sulfur	phosphorus	silicon	aluminum acid
	no more
08JU	0,07	0,35	0,025	0,020	0,03	0,02−0,07
08ps	0,09	0,45	0,030	0,025	0,04	-
08KP	0,10	0,40	0,030	0,025	0,03	-
Notes 1 In all grades of steel is allowed the mass fraction of aluminium-0.07% without limitation lower limit. 2 allowed for the mass fraction of carbon in the steel grade 08JU to 0.08%, steel grade 08ps — up to 0.10% subject to the compliance of the mechanical properties.

(Changed edition, Rev. N 1).

4.2.2 the Chemical composition (melting analysis) shall conform to the values given in table 5A.

Table 5A — Chemical composition (melting analysis)

Marking stamps	Application	Carbon max.	Manganese max.	Phosphorus max.	Sulfur max.
CR3	Deep drawing	0,10	0,45	0,03	0,03
CR4	Deep drawing special deoxidation (not aging)	0,08	0,45	0,03	0,03
All values given in wt. %.

4.2.3 rental of group II finish — the surface with normalized surface roughness. The rules of roughness is determined by agreement between the consumer and the manufacturer.

4.2.4 rental very deep drawing (VG) with a normalized yield strength.

Norms set by agreement between the consumer and the manufacturer.

4.2.5 rental very deep drawing (VG) with hardness control. Norms set by agreement between the consumer and the manufacturer.

4.2.6 rolled in a very special complex of extracts (VOSV, VOSV-T).

The mechanical properties and the depth of the spherical dimples when tested in the extrusion shall meet the requirements of tables 6 and 7.

Table 6

			Hardness, of not more than
The ability to extract	Limit yield strength, N/mm(kgf/mm), no more	Rupture strength , N/mm(kgf/mm)	Elongation , %, not less, when the thickness of the rolled			HRТ15	HRТ30	HRB
			when the thickness of the rolled
			less than 0.7 mm	from 0.7 to 1.5 mm incl.	St 1.5 to 2.0 mm incl.	from 0.5 to 0.8 mm incl.	St. 0.8 to 1.7 mm incl.	St. 1.7 to 2.0 mm incl.
VOSV	185 (19)	250−350 (26−36)	38	40	42	76	51	46
VOSV-T	175 (18)	250−320 (26−33)	40	42	44	75	45	43

Table 7

The thickness of rolling, mm	0,4	0,5	0,6	0,7	0,8	0,9	1,0	1,1	1,2	1,3	1,4	1,5	1,6	1,7	1,8	1,9	2,0
The depth of the spherical holes, mm	9,3	9,7	10,0	10,4	10,7	11,0	11,2	11,4	11,6	11,8	11,9	12,0	12,1	12,2	12,3	12,4	12,5
Note For rental of intermediate thickness standards depth of a spherical hole to take the nearest lower thickness shown in table 7.

4.2.7 rent very deep drawing (VG) with a temporary tear resistance of 270−350 N/mm(28 to 36 kgf/mm) and elongation not less than 34%. With plate thickness of up to 0.6 mm inclusive relative elongation should be not less than 33%.

4.2.8 hire a particularly high surface finish (group I). Characteristic of the quality of surface finish are given in table 8.

Table 8

Surface condition	Characteristics of the condition of surface finishes	The characteristics of surface quality
Glossy	Roughness of not more than 0.6 µm	On the face of the rental are not allowed defects, except for some marks and scratches length less than 20 mm
Matt	Roughness less than 1.6 µm	On the reverse side of the rental are not allowed defects, the depth of which exceeds ¼ of the sum of limit deviations for thickness and spots of dirt, color tint, and gray spots
Rough	Roughness 1.6 µm

4.2.9 hire the ability to draw VOSV, VOSV-T, OSV and SV casinoi 0.5 mm and less controlled hardness.

Standards must meet the requirements of table 2 and table 6 for thickness rolled, over 0.5 to 0.8 mm. it is allowed the presence of traces of deformation on the back side of the test sample.

4.2.10 rental with control of the microstructure

Rental must be with a long grain.

With equiaxed microstructure standards must meet the requirements of table 9.

Table 9

The ability to extract	The number of grains of ferrite	Structural-free cementite, points, no more
VOSV, VOSV-T	6, 7	2
OSV, SV	6, 7, 8, 9	2
VG	-	3
Note — hire the ability to draw VOSV and VOSV-T allowed the grain of the ferrite number 8 and 9.

4.3 Marking

4.3.1 Marking rolled — GOST 7566 with additions.

4.3.1.1 Marking rental, you should contain a group of surface finish, size of rental, the ability to draw. In the manufacture of hire in accordance with the requirements of 4.1.11 indicates designation — T.

Indicate grade of steel in the manufacture of hire in accordance with the requirements of 4.2.1.

4.3.1.1 and Unless otherwise specified, the following data for identification of steel shall be clearly indicated on the top sheet of each package or on label attached to each roll or sheet delivery:

— and — manufacturer’s name or identification trademark;

— b number of this international standard;

in marking quality;

— the order number;

d product dimensions;

— — the batch number;

— W — weight.

4.4 Packing

4.4.1 Packing of rental — according to GOST 7566 with additions:

4.4.1.1 Bicycle should be lubricated on both sides with a layer of grease that protects it from corrosion.

At the request of the consumer, not oil, in this case, allowed the grease, rust stains, marks and scratches, due to lack of grease.

4.4.1.1 In order prevent rust on sheet steel, compressed in a cold condition, usually apply a coating of oil, however in case of such requirements specified sheet material may be supplied without oil overlay. It should be remembered that the oil is not a lubricant for extruding or molding, and it should easily be removed degreasing substances.

4.4.1.2 stack of sheets is wrapped with sheets of mild steel, is placed on rails and are firmly bonded steel strips.

The use of other materials and ways of packaging, ensuring the safety of rental transportation. At the request of the consumer packs before wrapping sheets mild steel is additionally wrapped in waterproof paper.

5 Acceptance

5.1 Acceptance of rental — according to GOST 7566 with additions:

Rent to acceptance of the present parties. The party must consist of rental of one charge in one furnace or heat treatment furnace, continuous action, one category hoods, one size in thickness.

Party rental made in accordance with the requirements of 4.2.1 shall consist of one steel melting ladle.

5.2 Each shipment shall be accompanied by a document of quality in accordance with GOST 7566 with additions:

group surface finish;

— flatness;

— categories according to standardized characteristics.

In the manufacture of hire in accordance with the requirements of 4.1.1 in the document about the quality specifies the actual chemical composition of the steel.

In the manufacture of hire in accordance with the requirements of 4.1.1 point name — T.

Indicate grade of steel in the manufacture of hire in accordance with the requirements of 4.2.1.

5.3 For surface inspection, dimensions, flatness, chemical composition, mechanical properties test extrusion and determine the microstructure of each party rental take two sheets or one roll.

5.4 If unsatisfactory test results of at least one indicator of a re-test is carried out according to GOST 7566.

5.4 If the result of the failed to obtain pre-determined results two repeated tests should be undertaken on samples made from random material of the same party. The results of both tests shall conform to the requirements of ISO 3574−86, otherwise the whole batch may be rejected.

6 Methods to control

6.1 For testing mechanical and technological properties of rental from each selected roll selected one sample at a distance of not less than 2.0 m from its end. From each sample of the selected roll or sheet selected:

— a transverse tensile specimen (place clippings — according to GOST 7564);

— one specimen by squeezing. The sample is cut by the length corresponding to the entire width of the rental. The tests are carried out in places corresponding to the middle and the edge across the width of rolled (not closer than 40 mm from the edge). The test result should be the arithmetic mean of the three measurements. When tested on the automatic machine allowed reducing the depth of the spherical holes of 0.3 mm;

— two specimens on the microstructure is one with edge, one from the middle part of the width of the rental;

— one sample for hardness.

6.1 and the Samples for tensile testing and hardness test

From each batch of sheet material intended for delivery, should be prepared one representative sample for tensile testing (which is also used for hardness test) in accordance with the requirements specified in table 2A. Party in this case represents every 50 t or less of sheet material of the same quality, laminated to the same thickness and condition.

6.2 Test conduct:

— tensile — according to GOST 11701 on samples with an estimated length of 80 mm and a width of the working part 20 mm. the diagram of stretching for rental ability hoods VOSV, VOSV-T, OSV and SV should not be a site of fluidity. On the surface of the samples after testing should not be strips of slip lines;

— squeezing — GOST 10510.

Allowed to test on the device Ericksen on samples with a width of 80−90 mm;

— the amount of grain according to GOST 5639;

— the presence of structurally free cementite — according to GOST 5640 (scale I).

6.2 and tensile Tests should be carried out in accordance with standard ISO 6892. Samples for tensile testing in the transverse direction should be cut to half the distance between the center and the edge of the sheet in the direction of rolling.

6.3 surface Quality of rolled checked by visual inspection without the use of magnifying devices. Classification of surface defects according to GOST 21014.

6.4 Sampling for chemical analysis according to GOST 7565.

6.5 Chemical analysis according to GOST 22536.0 — 22536.5, GOST 22536.10 or other methods providing the required accuracy.

If there are differences in used methods established by this standard.

6.5 a Analysis of each melt should hold the manufacturer to determine the content in wt. % of carbon, manganese, phosphorus, and sulfur. If necessary, upon special request, the data of this analysis should be disclosed to the buyer or his representative.

6.6 hardness — GOST 9013 or GOST 22975, depending on the thickness of the hire and expected hardness values.

The hardness is determined on samples selected for tensile testing out their working part or on the samples in order to control the microstructure.

6.6 and hardness test shall be carried out in accordance with the recommendations of ISO/R 1024 ISO 6507−1 or ISO 6508, using the models referred to in 6.2.

6.7 surface Roughness of the rolled measured by the contact profilometer according to GOST 2789.

Samples taken from the control coil (sheet) at a distance of not less than 40 mm from the edge and from the middle part of the width of the roll (sheet) one sample of size 200x200 mm.

6.8 permitted the use of statistical and non-destructive methods of control, providing the accuracy achieved by direct methods of measurement.

If there are differences in applied methods of control established by this standard.

6.9 Control the depth of the surface defects is carried out according to the method of the manufacturer.

7 Transportation and storage

7.1 Transportation and storage — by GOST 7566.

ANNEX 1 (mandatory). Scheme legend rental

ANNEX 1
Mandatory

If you have not specified any parameters it selects the manufacturer.

ANNEX 2 (informative). The steel grade used

ANNEX 2
Reference

The ability to extract	Steel grade
VOSV, VOSV-T	08JU
OSV
SV
VG	08JU, 08KP, 08ps

APPENDIX 3 (reference). Determining the location of the front of the rental

APPENDIX 3
Reference

In rolled sheet metal face is the upper surface of the sheet bundle.

In a roll rolled face is the outer surface of the roll.



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Rolled steel General purpose: the security Council. Standards. -
M.: IPK Publishing house of standards, 2003