GOST 4041-71

• gost-4041-71.pdf (321.75 KiB)
  ГОСТ 4041-71

GOST 4041−71 rolled sheet for cold forming of structural quality steel. Technical specifications (Changes No. 1−4)

GOST 4041−71
Group B33

INTERSTATE STANDARD

THE ROLLED SHEET FOR COLD FORMING OF STRUCTURAL QUALITY STEEL

Specifications

Rolled plates of high quality structural steel for cold stamping. Specifications

OKP 09 8100

Date of introduction 1976−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 12.03.71 N 421

3. REPLACE GOST 4041−48

4. Standard uniform with OBD 14351−77

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 1050−88	2.4
GOST 1497−84	4.1
GOST 1763−68	4.1
GOST 5639−82	4.1
GOST 5640−68	4.1
GOST 7564−97	4.1 a
GOST 7565−81	3.5
GOST 7566−94	3.2, 5.1
GOST 9012−59	4.1
GOST 9013−59	4.1
GOST 9454−78	4.1
GOST 12359−99	4.1
GOST 14019−80	4.1
GOST 19903−74	1A.2, 1A.4
GOST 22536.1−88	4.1
GOST 22536.2−87	4.1
GOST 22536.3−88	4.1
GOST 22536.4−88	4.1
GOST 22536.5−87	4.1
GOST 22536.6−88	4.1
GOST 22536.7−88	4.1
GOST 22536.8−87	4.1
GOST 22536.9−88	4.1
GOST 22536.10−88	4.1
GOST 28473−90	4.1

6. Limitation of actions taken on the Protocol, the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

7. EDITION with Amendments No. 1, 2, 3, 4, approved in August 1974, April 1980, December 1985, may 1990 (IUS 10−74, 5−80, 3 to 86, 8−90).


This standard applies to hot rolled plates with thickness from 4 to 14 mm of high quality structural carbon steel, intended for cold forming.

(Changed edition, Rev. N 3, 4).

1. CLASSIFICATION

1.1. Rentals are divided as follows:

a) at the normalized characteristics 1, 2, 3, 4;

b) the quality of the surface finish on the group:

— high finishing — III,

— plain finish — IV;

C) accuracy of rolling:

— high — AA,

— high — A,

— normal — B.

(Changed edition, Rev. N 1, 3).

1a. BRAND AND ASSORTMENT

1a.1. The steel grade and the thickness of the sheets shall be as specified in table.1A.

Table 1a

Category	The thickness of the sheets, mm	Steel grade
1	From 4 to 14 incl.	08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25Ps, 25, 30, 35, 40
2		08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25Ps, 25, 30, 35, 40, 08JUA, 10JUA, 15JUA, 20JUA
3	4 to 8 incl.	08KP, 08ps
4		08JU

1a.2. Shape, dimensions and limit deviations on width and length, deflection from flatness and Cochin Reza hire should correspond to GOST 19903.

1A.3. Maximum deviations in thickness of the sheets must conform to the standards specified in table.1B.

Table 1B

In millimeters

The thickness of the sheets	Pred. off.
	high precision AA	increased accuracy And	normal precision, B the width of the sheet
			up to 1200	more than 1,200
4 to 5 incl.	±0,25	±0,30	-	-
SV. 5 to 6 incl.	±0,28	±0,35
SV. 6 to 7 incl.	±0,30	±0,37	+0,3 -0,5	±0,5
SV. 7 to 8 cyl.	-
SV. 8 to 10 incl.		-
SV. 10 to 12 incl.			+0,4 -0,6	±0,6
SV. 12 to 14 incl.			+0,5 -0,7	±0,7

1a.4. Camber sheets intended for the manufacture of spars shall not exceed 3 mm per 1 m length, the entire length is 15 mm with a length of less than 7200 mm.

Example of designation of sheet metal dimensions 6х700х6000 mm according to GOST 19903, normal accuracy of rolling (B), the normal flatness (PN) of steel grade 20, category 2, group IV surface finishing, heat-treated (T):

Sec. 1A. (Added, Rev. N 3).

2. TECHNICAL REQUIREMENTS

2 1. Rental made in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

(Changed edition, Rev. N 1, 2, 3).

2.2. Depending on the standardized characteristics of the hire are made in accordance with the requirements of table.1.

Table 1

Category	Steel grade	Normalized feature
			Mechanical property
		Chemical composition	Times — ing company of Tule — nie , N/mm(kgf/mm)	The limit current of honor , N/mm(kgf/mm)	Relatively outline — tion , %	Hard — ness, HB or HRB	Bending in cold — rated as 180°	Grain size	Structurally SVO — BoD — hydrated cements Titus	Bands — chatot	Bezug — l’heureux — wives — tion layer for steel grades 35, 40
1	08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25Ps, 25, 30, 35, 40	+	+	-	+	-	-	-	-	-	+*
2	08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25Ps, 25, 30, 35, 40, 08JUA, 10JUA, 15JUA, 20JUA			+*		+	+	+		+*
3	08KP, 08ps			+					+*	+	-
4	08JU									-

Notes:

1. The «+" sign means that the feature is normalized, the sign «— «is not normalized, the «+*" — normalized on-demand consumer.

2. The grain size of steel grades 30−40 category 2 is not normalized.


(Changed edition, Rev. N 1−4).

2.3. By agreement with the consumer allowed to produce sheets of stanoevski. The conditions of manufacture of hire on stanoevski established by agreement between the manufacturer and the consumer.

(Changed edition, Rev. N 4).

2.4. Chemical composition of steel shall conform to the standards specified in GOST 1050's and Vice table.2 of this standard.

For rental of steel grades 08KP and 08ps 3rd category chemical composition of steel shall conform to the standards given in table.2.

Table 2

Steel grade	Mass fraction of elements, %, not more
	Carbon	Manganese	Silicon	Sulfur	Phosphorus	Chrome	Nickel	Copper	Aluminium
08ps	0,09	0,25−0,45	0,04	0,030	0,025	0,10	0,15	0,20	-
08KP	0,10		0,03
25Ps	0,22−0,27	0,25−050		0,040	0,040	0,25	0,25	0,30
08JU	0,10	0,25−0,45		0,030	0,025	0,10	0,15	0,20	0,02−0,08
08JUA		0,20−0,40		0,025	0,020
10JUA	0,07−0,14		0,07
15JUA	0,12−0,18	0,25−0,45
20JUA	0,16−0,22

Notes:

1. In steel brand 25Ps in ready rental is allowed the mass fraction of carbon up to 0.30% silicon up to 0.08%.

2. In semi-killed steel permitted the presence of residual aluminum.

3. Mass fraction of arsenic and nitrogen in the steel should not exceed the limits given vhost 1050.


(Changed edition, Rev. N 2, 4).

2.5−2.8. (Deleted, Rev. N 1, 3).

2.9. Sheets are produced in heat-treated (annealed, normalized, vysokoopasnye, normalized and vysokoopasnye).

Sheets laminated on the continuous rolling mills, and leaves the 1st and 4th categories, laminated on other countries allowed to produce without any heat treatment subject to compliance with all requirements of this standard.

By agreement with the consumer allowed to produce sheets 2nd category, laminated on the mills exploded-rolled, without heat treatment.

(Changed edition, Rev. N 3).

2.10. Mechanical properties of the sheets shall be as specified in table.4.

Table 4

Steel grade	Category	Temporary resistance , MPa (kgf/mm)	Yield strength , MPa (kgf/mm) not more than	Elongation, %, not less than		Hardness, no more
						HRB	HB
08KP	1−2	270−370 (28−38)	-	34	30	55	100
08ps, 08		270−410 (28−42)		32	28	61	109
10kp						64	114
10ps, 10		290−420 (30−43)			27	66	117
15kp, 15ps, 15		320−440 (33−45)		30	26	68	121
20kp, 20ps, 20		340−490 (35−50)		28	24	71	127
25Ps		370−540 (38−55)		27	23	76	138
25		390−540 (40−55)		26
30		430−590 (44−60)		24	21	80	149
35		480−640 (49−65)		22	18	84	163
40		510−660 (52−67)		21	17	85	167
08KP, 08ps	3	not more than 360 (37)	235 (24)	36	32	54	98
08JU	4		265 (27)			67	118
08JUA	2	270−360 (28−37)	-			65	116
10JUA		270−410 (28−42)		32	28	66	117
15JUA		320−440 (33−45)		30	26	68	121
20JUA		340−490 (35−50)		28	24	71	127

Notes:

1. For plates in normalized condition a higher strength of 50 N/mm(5 kgf/mm), subject to the norms relative elongation and bending.

2. For sheets of steel grade 08KP 3 category, the yield strength is guaranteed within 7 days from the day of the test.

3. Allowed by agreement between manufacturer and consumer exceeding the standards of hardness on the 5 units of NV in the observance of the relative elongation, ultimate strength, yield strength and bending.

4. Norms in terms of the yield strength for steel grades 2nd category set from 01.01.94.

The determination is carried out for the dataset.


(Changed edition, Rev. N 3, 4).

2.11. Leaves 2 (except steel 40), 3rd and 4th categories must withstand the bend test cold 180° when the thickness of the mandrel specified in table.5.

Table 5

Steel grade	The thickness of the mandrel when the thickness of the sheet
08KP, 08ps, 08, 08JU, 10kp, 10ps, 10, 15kp, 15ps, 08JUA, 10JUA	=0 (before contact)
15, 20kp, 20ps, 20, 25Ps, 25, 15JUA and 20JUA
30, 35

In the curve should be free of tears, cracks, and delamination.

2.12. Grain size of steel should not be larger than 5, the numbers sheets 2nd category and 6th numbers worksheets 3 and 4-th categories.

The unevenness of the grain may be within three adjacent mesh sizes.

2.11, 2.12. (Changed edition, Rev. N 1, 2, 3).

2.13, 2.14. (Deleted, Rev. N 3).

2.15. At the request of the consumer the sheets of steel grades 35 and 40 should be checked for depth bezoperatsionnogo layer. Depth of decarburization (ferrite plus transition zone) must not exceed 2% of the actual thickness of the sheet.

2.16. Sheets are produced in etched form.

It is possible to manufacture sheets with a thickness of 4−6 mm in dressirovka; standards of hardness established by agreement between the manufacturer and the consumer.

2.15, 2.16 (Revised edition, Edit. N 3).

2.17. The surface of the sheets must be clean, must not have rolled and kletochnykh captured, smoothed out bubbles, cracks and impurities, laps, cracks, stress, delamination katanoi scale. Allowed yellow tint after etching.

On the surface of the sheets of the third group of trim allowed defects not outputting the sheets beyond the negative limit deviation: total easy Rabina, sinks scale sink-wdwy, minor scratches and fingerprints.

On the surface of the sheet group IV surface finish defects permitted, not outputting the sheets beyond the negative limit deviation: total Rabina, sinks scale sink-wdwy, minor scratches, fingerprints.

Allowed Stripping of local defects on the surface of the leaves.

The depth of Stripping should take the sheets outside the negative extreme deviations.

The quality of the surface is allowed to clarify by comparison with the standards agreed upon by manufacturer and consumer.

(Changed edition, Rev. N 2).

2.18. The leaves should be trimmed evenly on all sides. Sheets laminated on the continuous rolling mills can be supplied with edging (rolled) edge, if the depth of the torn edges does not exceed half the tolerances for the width of the sheet and outputs the sheet beyond the nominal width.

(Changed edition, Rev. N 3).

2.19. The leaves should be straightened.

(Changed edition, Rev. N 2, 3).

2.20. (Deleted, Rev. N 3).

2.21. When control leaves the ultrasound norms set by agreement between manufacturer and consumer.

(Changed edition, Rev. N 3).

2.22. Standards for determination at the request of the consumer impact toughness at minus 20 or minus 40 °C for sheets of steel calm and semi-killed grades, poloschatosti worksheets 2nd category of grain size for sheets of steel grades 30−40, structural-free cementite for worksheets 3 and 4-th categories set by agreement between manufacturer and consumer.

(Added, Rev. N 3).

3. ACCEPTANCE RULES

3.1. (Deleted, Rev. N 3).

3.2. The sheet discharge produced by the parties. The party must consist of sheets of one melting ladle (steel, pour it into ingots), one thickness, one batch in the oven, or a single mode of heat treatment (furnaces for continuous operation) and one category and be accompanied by a document of quality according to GOST 7566 with the additional indication:

— the type of heat treatment;

values of yield strength for steel grades category 2 (subject to definition);

— test results sheets of non-destructive methods (subject to the control of the ultrasonic or other methods).

For sheets, made of steel from continuous casting, the weight of the batch shall not exceed 250 tons

(Changed edition, Rev. N 1, 3, 4).

3.3. Visual inspection should be subjected to all sheets included in the batch. The surface inspection should be carried out without the use of magnifying devices.

3.4. (Deleted, Rev. N 1).

3.5. Sampling for chemical analysis is carried out according to GOST 7565. For chemical analysis of one sample taken from the bottoms of the bucket.

3.6. The number of sheets taken from each batch to check the quality of hire is established by the manufacturer, but not less than two.

The number of sheets for the ultrasonic inspection is determined by agreement between manufacturer and consumer.

3.7. Determination of impact strength at a temperature of minus 20 and minus 40 °C for sheets of steel calm and semi-killed grades, poloschatosti worksheets 2nd category of grain size for sheets of steel grades 30−40, structural-free cementite for sheets 3 and 4th categories is performed according to the requirement of the user.

3.6, 3.7. (Changed edition, Rev. N 3).

3.8. If unsatisfactory validation results of at least one of the indicators for him a second check for twice the number of samples selected from the other leaves the party.

(Added, Rev. N 3).

3.9. The volume control stanoevski determined by agreement between the manufacturer and the consumer.

(Added, Rev. N 4).

4. TEST METHODS

4.1. From each selected for control select sheet:

a) a transverse sample of the tensile and Flexural strength. Place tenderloin — GOST 7564 (version 1);

b) two sample for hardness, depth of decarburization, grain size, poloschatosti and the presence of structurally free cementite.

One sample is cut at a distance of 40−50 mm from the edge of the middle third of the width of the sheet. In coordination with the consumer the test can be performed on one sample cut from the middle third of the width of the sheet.

(Added, Rev. N 3).

4.1. The tests are carried out:

— tensile — according to GOST 1497, and on short samples; carrying out repeated tests on samples with the estimated length of 11.3; the norms shall be as specified in table.4 for elongation ;

— bending — according to GOST 14019*;
_______________
* On the territory of the Russian Federation GOST 14019−2003. — Note the manufacturer’s database.

— hardness according to Brinell and Rockwell — GOST GOST 9012 or 9013; hardness measurement allowed to produce the samples selected for the tensile test;

— the amount of grain according to GOST 5639;

— decarbonisation — GOST 1763;

— the banding and structural-free cementite — according to GOST 5640;

— toughness at low temperatures — according to GOST 9454.

Chemical composition is determined by GOST 22536.1-GOST 22536.10 or other methods providing the required accuracy of the analysis.

(Changed edition, Rev. N 1−3).

4.2. In the manufacture of sheets of stanoevski tests listed in clause 4.1, is not carried out. The supplier guarantees stanoevski metal to the first heat treatment, or before coating.

(Changed edition, Rev. N 3).

4.3, 4.4. (Deleted, Rev. N 3).

4.5. Allowed to control the mechanical properties by nondestructive methods according to the method agreed between the manufacturer and the customer.

4.6. Ultrasonic inspection technique set by agreement between the manufacturer and the consumer.

4.5, 4.6. (Added, Rev. N 3).

4.7. Conditions for the control of stanoevski set by agreement between manufacturer and consumer.

(Added, Rev. N 4).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage in accordance with GOST 7566 with the following additions.

5.1.1. Transportation rental packages carry out transport in accordance with cargo carriage regulations applicable to transport of this species.

(Changed edition, Rev. N 3).

5.2. Each sheet should be oiled on both sides with neutral oil or inhibitor grease. Sheets of steel grades 08JUA, 10JUA, 15JUA and 20JUA needs to be lubricated from two sides spindle oil with added inhibitor. Sheets of steel other grades upon a customer’s request is lubricated from two sides of the neutral oil with the addition of the inhibitor.

(Changed edition, Rev. N 2).

5.3, 5.4. (Deleted, Rev. N 3).

Sec. 6. (Deleted, Rev. N 3).


The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
High quality steel: Sat. Standards. -
M.: IPK Publishing house of standards, 2002