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YB/T 5058-2005Cold-Rolled Spring and Tool Steel Strips (English PDF)

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Issued by

National Development and Reform Commission

Level / Type

National · Recommended

Issue date

July 26, 2005

Implementation date

December 1, 2005

Scope

YB/T 5058-2005 (Cold-Rolled Spring and Tool Steel Strips) is available as an English-translated PDF.

YB/T 5058-2005 - This Standard specifies the classification and code, dimension, shape, weight, technical requirements, test and inspection, package, marking and quality certificate, etc. of cold-rolled spring and tool steel strips.

This Standard is applicable to the cold-rolled spring and tools steel strips for manufacturing the springs, knives, tapes and other products with rolling width less than 600mm.

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Document preview — YB/T 5058-2005

National Standard of the People's Republic of China

ICS: 77.140.50
Classification: H 46

Issued by: National Development and Reform Commission

Foreword...3
1 Scope...4
2 Normative References...4
3 Ordering Contents...7
4 Classification and Code...7
5 Dimension, Shape, Weight and Allowable Tolerance...8
6 Technical Requirements...8
7 Test Methods...10
8 Inspection Rules...11
9 Package, Marking and Quality Certificate...12

Foreword

This Standard replaced YB/T 5058-1993 Cold-Rolled Spring and Tool Steel Strips.

Compared with the original standard, this Standard has the major modification

contents as follows.

--- Re-define the classification and code;

--- Quote the dimension, shape and allowable tolerance from GB/T 15391-1994;

--- Delete the Designation 65Si2MnWA.

This Standard was proposed by China Iron and Steel Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee for

Standardization of Steel.

Drafting organization of this Standard. China Metallurgical Information and

Standardization Institute.

Chief drafting staffs of this Standard. Wang Xiaohu, and Dong Li.

The historical editions replaced by this Standard are as follows.

--- GB 3525-1983; YB/T 5058-1993.

Cold-Rolled Spring and Tool Steel Strips

1 Scope

This Standard specifies the classification and code, dimension, shape, weight,

technical requirements, test and inspection, package, marking and quality certificate,

etc. of cold-rolled spring and tool steel strips.

This Standard is applicable to the cold-rolled spring and tools steel strips for

manufacturing the springs, knives, tapes and other products with rolling width less than

600mm.

2 Normative References

The provisions in following documents become the provisions of this Standard through

reference in this Standard. For dated references, the subsequent amendments

(excluding corrigendum) or revisions do not apply to this Standard, however, parties

who reach an agreement based on this Standard are encouraged to study if the latest

versions of these documents are applicable. For undated references, the latest edition

of the referenced document applies.

GB/T 222-1984 Method of Sampling Steel for Determination of Chemical

Composition and Permissible Variations for Product Analysis

GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The

Diantipyryl Methane Phosphomolybdate Gravimetric Method for the Determination

of Phosphorus Content

GB/T 223.9 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chrome

Azurol S Photometric Method for the Determination of Aluminum Content

GB/T 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy-The

Cupferron Separation - Chrome Azurol S Photometric Method for the

Determination of Aluminum Content

GB/T 223.11 Methods for Chemical Analysis of Iron, Steel and Alloy - Ammonium

Sulfate Oxidation Volumetric Method for the Determination of Chromium Content

GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-

Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the

Determination of Vanadium Content

GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The

Chromotropic Acid Photometric Method for the Determination of Titanium Content

GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium

Thiosulfate Separation Iodometric Method for the Determination of Copper

Content

3 Ordering Contents

When ordering product, the user shall provide the following information.

4 Classification and Code

4.1 Classification by edge state

4.3 Classification by surface quality

4.4 Classification by soft-hard-degree

5 Dimension, Shape, Weight and Allowable Tolerance

The dimension, shape, weight and allowable tolerance of steel strip shall conform to

the corresponding provisions of GB/T 15391-1994.

6 Technical Requirements

6.1 Designations and chemical compositions

The chemical compositions of T7, T7A, T8, T8A, T8Mn, T8MnA, T9, T9A, T10, T10A,

T11, T11A, T12, T12A, T13, T13A shall conform to the provisions of GB/T 1298-1986.

The chemical compositions of Cr06 shall conform to the provisions of GB/T 1299-2000.

The chemical compositions of 85, 65Mn, 50CrVA, 60Si2Mn, 60Si2MnA shall conform

to the provisions of GB/T 1222-1984.

6.2 Steel strips shall be delivered in coils. For the chilled steel strip and annealed steel

strip with thickness no greater than 0.3mm, the inner diameter of the coils shall be no

less than 150mm; while the annealed steel strip with thickness greater than 0.3mm,

the inner diameter of the coil shall be no less than 200mm.

6.4 According to the requirements of the purchaser, the hardness of the steel strip can

be inspected. The hardness value and test method shall be agreed by the supplier and

the purchaser.

6.5 Through the negotiation between the two parties, the spheroidal annealed steel

strip can be supplied. The spherical pearlite level and the evaluation method shall be

agreed by the supplier and the purchaser.

6.7 The surface of the higher-level steel strip shall be smooth and free of cracks,

crusting, foreign inclusions, iron oxide scale, rust and delamination. The individual tiny

concaves, bumps, scratches, indentations and pitting with depth or height no greater

than half thickness tolerance of steel strip are allowed to exist.

6.8 The surface of ordinary-level steel strip shall be oxidized, and free of cracks,

crusting, foreign inclusions, iron oxidized scales, rust, and delamination. The individual

tiny concaves, bumps, scratches, indentations, pitting, as well as inconspicuous

corrugations and troughs with depth or height no greater than thickness tolerance of

steel strip are allowed to exist.

7 Test Methods

7.1 The quantity of inspection samples per batch of steel strips and the test methods

shall conform to the provisions of Table 4.

7.2 The surface quality of steels strip shall be examined visually.

7.3 The tensile test of the steel strip shall conform to the provisions of GB/T 228.

7.3.1 The width and gauge length of sample for tensile test shall conform to the

provisions of Table 5.

7.3.5 Calculate the strength according to the actual section before the sample test.

7.4 The inspection on the depth of decarburization layer shall be performed as per

GB/T 224.

8 Inspection Rules

8.1 Steel strips shall be accepted in batches. Each batch consists of the steel strips

with the same designation, the same furnace number, the same dimension, the same

type and the same group.

8.3 All steel strips shall be performed the appearance and dimension test.

Thickness of steel strip Gauge length Sample width

The tolerance of sample width is ± 0.25.

8.4 The unevenness of the steel strip is inspected under the chill condition.

8.5 From the steel strips with qualified appearance and dimension, select 3% but no

less than 2 coils (bundles) to perform the tensile test, hardness test, spherical pearlite

grade test, and decarburization layer depth test.

8.6 For the sampling position of the sample, the non-trimming steel strip shall be no

less than 10mm from the edge; while the trimming steel strip shall be no less than 5mm

from the edge.

8.7 The reinspection of the steel strip shall be performed as per the GB/T 247-1997.

9 Package, Marking and Quality Certificate

The package, marking and quality certificate of the steel strip shall be performed as

per the provisions of GB/T 247-1997.

YB/T 5058-2005

NATIONAL FERROUS METALLURGY INDUSTRY

ICS 77.140.50

H 46

Replacing YB/T 5058-1993

Cold-Rolled Spring and Tool Steel Strips

Issued on. JULY 26, 2005

Implemented on. DECEMBER 01, 2005

Issued by. National Development and Reform Commission

Table of Contents

Foreword... 3

1 Scope... 4

2 Normative References... 4

3 Ordering Contents... 7

4 Classification and Code... 7

5 Dimension, Shape, Weight and Allowable Tolerance... 8

6 Technical Requirements... 8

7 Test Methods... 10

8 Inspection Rules... 11

9 Package, Marking and Quality Certificate... 12

Foreword

This Standard replaced YB/T 5058-1993 Cold-Rolled Spring and Tool Steel Strips.

Compared with the original standard, this Standard has the major modification

contents as follows.

--- Re-define the classification and code;

--- Quote the dimension, shape and allowable tolerance from GB/T 15391-1994;

--- Delete the Designation 65Si2MnWA.

This Standard was proposed by China Iron and Steel Industry Association.

This Standard shall be under the jurisdiction of National Technical Committee for

Standardization of Steel.

Drafting organization of this Standard. China Metallurgical Information and

Standardization Institute.

Chief drafting staffs of this Standard. Wang Xiaohu, and Dong Li.

The historical editions replaced by this Standard are as follows.

--- GB 3525-1983; YB/T 5058-1993.

Cold-Rolled Spring and Tool Steel Strips

1 Scope

This Standard specifies the classification and code, dimension, shape, weight,

technical requirements, test and inspection, package, marking and quality certificate,

etc. of cold-rolled spring and tool steel strips.

This Standard is applicable to the cold-rolled spring and tools steel strips for

manufacturing the springs, knives, tapes and other products with rolling width less than

600mm.

2 Normative References

The provisions in following documents become the provisions of this Standard through

reference in this Standard. For dated references, the subsequent amendments

(excluding corrigendum) or revisions do not apply to this Standard, however, parties

who reach an agreement based on this Standard are encouraged to study if the latest

versions of these documents are applicable. For undated references, the latest edition

of the referenced document applies.

GB/T 222-1984 Method of Sampling Steel for Determination of Chemical

Composition and Permissible Variations for Product Analysis

GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The

Diantipyryl Methane Phosphomolybdate Gravimetric Method for the Determination

of Phosphorus Content

GB/T 223.9 Methods for Chemical Analysis of Iron, Steel and Alloy - The Chrome

Azurol S Photometric Method for the Determination of Aluminum Content

GB/T 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy-The

Cupferron Separation - Chrome Azurol S Photometric Method for the

Determination of Aluminum Content

GB/T 223.11 Methods for Chemical Analysis of Iron, Steel and Alloy - Ammonium

Sulfate Oxidation Volumetric Method for the Determination of Chromium Content

GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-

Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the

Determination of Vanadium Content

GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The

Chromotropic Acid Photometric Method for the Determination of Titanium Content

GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium

Thiosulfate Separation Iodometric Method for the Determination of Copper

Content

3 Ordering Contents

When ordering product, the user shall provide the following information.

4 Classification and Code

4.1 Classification by edge state

4.3 Classification by surface quality

4.4 Classification by soft-hard-degree

5 Dimension, Shape, Weight and Allowable Tolerance

The dimension, shape, weight and allowable tolerance of steel strip shall conform to

the corresponding provisions of GB/T 15391-1994.

6 Technical Requirements

6.1 Designations and chemical compositions

The chemical compositions of T7, T7A, T8, T8A, T8Mn, T8MnA, T9, T9A, T10, T10A,

T11, T11A, T12, T12A, T13, T13A shall conform to the provisions of GB/T 1298-1986.

The chemical compositions of Cr06 shall conform to the provisions of GB/T 1299-2000.

The chemical compositions of 85, 65Mn, 50CrVA, 60Si2Mn, 60Si2MnA shall conform

to the provisions of GB/T 1222-1984.

6.2 Steel strips shall be delivered in coils. For the chilled steel strip and annealed steel

strip with thickness no greater than 0.3mm, the inner diameter of the coils shall be no

less than 150mm; while the annealed steel strip with thickness greater than 0.3mm,

the inner diameter of the coil shall be no less than 200mm.

6.4 According to the requirements of the purchaser, the hardness of the steel strip can

be inspected. The hardness value and test method shall be agreed by the supplier and

the purchaser.

6.5 Through the negotiation between the two parties, the spheroidal annealed steel

strip can be supplied. The spherical pearlite level and the evaluation method shall be

agreed by the supplier and the purchaser.

6.7 The surface of the higher-level steel strip shall be smooth and free of cracks,

crusting, foreign inclusions, iron oxide scale, rust and delamination. The individual tiny

concaves, bumps, scratches, indentations and pitting with depth or height no greater

than half thickness tolerance of steel strip are allowed to exist.

6.8 The surface of ordinary-level steel strip shall be oxidized, and free of cracks,

crusting, foreign inclusions, iron oxidized scales, rust, and delamination. The individual

tiny concaves, bumps, scratches, indentations, pitting, as well as inconspicuous

corrugations and troughs with depth or height no greater than thickness tolerance of

steel strip are allowed to exist.

7 Test Methods

7.1 The quantity of inspection samples per batch of steel strips and the test methods

shall conform to the provisions of Table 4.

7.2 The surface quality of steels strip shall be examined visually.

7.3 The tensile test of the steel strip shall conform to the provisions of GB/T 228.

7.3.1 The width and gauge length of sample for tensile test shall conform to the

provisions of Table 5.

7.3.5 Calculate the strength according to the actual section before the sample test.

7.4 The inspection on the depth of decarburization layer shall be performed as per

GB/T 224.

8 Inspection Rules

8.1 Steel strips shall be accepted in batches. Each batch consists of the steel strips

with the same designation, the same furnace number, the same dimension, the same

type and the same group.

8.3 All steel strips shall be performed the appearance and dimension test.

Thickness of steel strip Gauge length Sample width

The tolerance of sample width is ± 0.25.

8.4 The unevenness of the steel strip is inspected under the chill condition.

8.5 From the steel strips with qualified appearance and dimension, select 3% but no

less than 2 coils (bundles) to perform the tensile test, hardness test, spherical pearlite

grade test, and decarburization layer depth test.

8.6 For the sampling position of the sample, the non-trimming steel strip shall be no

less than 10mm from the edge; while the trimming steel strip shall be no less than 5mm

from the edge.

8.7 The reinspection of the steel strip shall be performed as per the GB/T 247-1997.

9 Package, Marking and Quality Certificate

The package, marking and quality certificate of the steel strip shall be performed as

per the provisions of GB/T 247-1997.

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 12 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 223.3 · GB/T 223.9 · GB/T 223.10 · GB/T 223.16

Cited by

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