TU 14-550-6-94 tape 60S2A

AGREED Chief Engineer PO Izhmash Yu.I. Belotserkovsky 8.09.94

UDC Group B34 I APPROVE General manager PO "Izhstal" V.V. Moiseev 09/16/94

COLD-ROLLED STEEL TAPE GRADE 60S2A, 60S2A-SH

Technical conditions

TU 14-550-6-94

(Reissued in 2004 with changes 1-3)

Valid from 01.11.94 without limitation

Chief Technologist PO "Izhstal" M.A. Loyferman 15.07.94

1994

TU 14-550-6-94

These technical conditions apply to cold-rolled strip made of grade 60S2A steel, obtained by open smelting (60S2A) or electroslag remelting (60S2A-Sh), hereinafter referred to as strip.

Cold rolled strip is intended for the production of springs and other products.

Example of a symbol:

Cold-rolled strip, 0.7 mm thick, high precision (T), 20.0 mm wide, normal precision, with uncut edges (HO), cold-worked, ordinary quality (H), light (C), without microstructure control, made of 60C2A steel grade.

Tape 0.7-Tx20-NO-N-S-60S2A TU 14-550-6-94

Referenced regulatory documents (RD) are given in Appendix B.

1 TECHNICAL REQUIREMENTS

1.1 Cold-rolled strip must comply with the requirements of these technical conditions and be manufactured according to technological documentation approved in the established manner.

1.2. Main parameters and sections

1.2.1 The tape is manufactured:

- thickness from 0.2 to 3.0 mm;

- width from 15.0 to 240.0 mm.

Maximum deviations in thickness and width of the tape must comply with GOST 2283;

by manufacturing precision

- by thickness:

- normal accuracy;

- high precision - T;

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- by width:

- normal accuracy;

- high precision - Ш;

by surface type

- annealed tape:

- light - C;

- light with tarnished colors - C;

- dark;

- work-hardened tape:

- light - C;

- dark;

by the type of edges

- with cut edges;

- with uncut edges - NO;

by type of processing

- annealed of ordinary quality;

- cold-worked, ordinary quality - H;

by microstructure

- without microstructure control.

1.3 Characteristics

1.3.1 The chemical composition of steel must comply with the standards of Table 1.

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Table 1 In percentage

Mass fraction of elements
Carbon	Manganese	Silicon	Phosphorus	Sulfur	Copper	Nickel	Chromium
			no more
0.58-0.63	0.60-0.90	1.6-2.0	0.025	0.025	0.25	0.25	0.30
Note - For steel obtained by electroslag remelting, the mass fraction should not exceed the content of: phosphorus - 0.020%, sulfur - 0.015%. Limit deviations for the mass fraction of carbon are plus or minus 0.02%.

1.3.2 The tensile strength, σ _in, should be:

- for annealed tape no more than 880 N/mm² (90 kgf/mm²);

- for work-hardened strip - 780-1180 N/mm² (80-120 kgf/mm²),

- relative elongation, δ ₄ for annealed tape should be at least 8%.

1.3.3 The depth of one-sided decarburization of the tape must comply with GOST 2283.

1.3.4 The surface of the tape should be free of film, rolled-in scale, rolled-in metal particles, tears and rust. The presence of isolated films, as well as individual small scratches, marks, prints, ripples, the size of which does not exceed:

- for light and light with tarnished colors of tape - half of the maximum deviations in thickness;

- for dark tape - maximum thickness deviation.

1.3.5 The light tape must have a metallic surface color from light gray to dark gray.

On a light tape with tarnish colors, an oxidized surface with non-uniform tarnish colors of various shades is allowed.

The surface color of the dark tape is not regulated. Spots of dirt are allowed on the surface of the dark tape.

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1.3.6 The following is not allowed on tape with cut edges:

- in width - torn edge and nicks with a depth of more than half the maximum deviation;

- by thickness - burrs larger than the maximum deviation for normal thickness accuracy.

1.3.7 On a tape with uncut edges, a torn edge with a depth greater than the maximum deviation in width is not allowed.

1.3.8 Delamination of the tape is not permitted.

1.3.9 The crescent shape of the cut tape must comply with GOST 2283.

1.3.10 Other technical requirements according to GOST 2283.

1.3.11 The purity of steel for non-metallic inclusions for steel grade 60S2A-Sh must comply with the standards specified in Table 2.

Table 2

Type of non-metallic inclusions	Acceptable score, no more than
	average	maximum
Linear oxides - OS	1.5	2.0
Point oxides - OT	1.5	2.0
Silicates brittle - CX	2.0	2.5
Plastic silicates - SP	2.0	2.5
Non-deformable silicates - SN	2.0	2.5
Sulfides - C	2.0	2.5

1.4 Marking

1.4.1 Marking of tape according to GOST 2283.

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1.5 Packaging

1.5.1. Packaging of tape according to GOST 2283.

2 ACCEPTANCE RULES

2.1 Acceptance rules according to GOST 2283.

3 CONTROL METHODS

3.1 Control methods according to GOST 2283.

4 TRANSPORTATION AND STORAGE

4.1 Transportation of the tape must be carried out in accordance with GOST 2283.

4.2 The tape must be stored in the manufacturer's and consumer's warehouses in closed storage facilities that protect it from exposure to moisture and chemical reagents.

5 MANUFACTURER'S WARRANTIES

5.1 The manufacturer guarantees that the tape complies with the requirements of these technical conditions, subject to the transportation and storage conditions established by the technical conditions.

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APPENDIX A

(recommended)

SCROLL

equipment and tools used in product inspection

Equipment and tools		Parameter controlled
Name	Type, division value, error
Calipers	GOST 166-89, division value 0.05 mm, error ± 0.1 mm, measuring range 0-250 mm		Tape width, dimensions of samples for mechanical testing, relative elongation, surface quality
Micrometer	GOST 6507-90, division value 0.01 mm, error ± 0.005 mm, measurement range 0-25 mm		Tape thickness, surface quality
Car rupture	GOST 28840-90, error ± 1%		Tensile strength, relative elongation
Ruler measuring metal	GOST 427-75, division value 1 mm, error ± 0.5 mm		Inner diameter of roll
Roulette measuring metal	GOST 7502-98, class 3, price divisions 1 mm, error ±2 mm, measuring range 0-5 mm		Length of tape
Scales	GOST R 53228-2008, error ± 600 g, measuring range up to 500 kg		Weight of pack, roll
Metallographic microscope	TU 3-3.ED1.2068-89		Depth of decarburized layer, size of non-metallic inclusions
Profilometer	GOST 19300-86		Roughness of the tape
Ruler	Enterprise ND		Crescent shape of the tape

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APPENDIX B

(informative)

REFERENCE REGULATORY DOCUMENTS

Designation of the referenced document	Section, paragraph, appendix number
GOST 166-89 GOST 427-75 GOST 2283-79 GOST 6507-90 GOST 7502-98 GOST 19300-86 GOST 28840-90 GOST R 53228-2008 TU 3-4.ED1.2068-89	Appendix A Appendix A 1.2.1; 1.3.3; 1.3.9; 1.3.10; 1.4.1; 1.5.1; 2.1; 3.1; 4.1 Appendix A Appendix A Appendix A Appendix A Appendix A Appendix A

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APPENDIX B

(recommended)

Change	Sheet (page) numbers				Document number	Signature	Date	Deadline for introducing the change
	changed	replaced	new	cancelled
p/4	7.8	-	-	-	p/4			01.03.2004
4	1	2, 3, 4, 5, 6, 7, 8	-	-	Izv. 4-2016		10/31/16	11/15/2016
P4	7	-	-	-	P4		03.07.19
P4	8	-	-	-	P4		03.07.19

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