DRAFT MALAYSIAN 15P004R0 STANDARD - SIRIM€¦ · SIRIM Berhad (National Centre for ... MS ISO 6508-1, Metallic materials -- Rockwell hardness test -- Part 1: Test method MS ISO 6892-1,

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DRAFT

MALAYSIAN 15P004R0

STANDARD STAGE : PUBLIC COMMENT (40.20)

DATE : 01/02/2016 – 01/04/2016

Alloyed spring steels - Specification OFFICER/SUPPORT STAFF: (NI/siti) ICS: 77.140.10 Descriptors: steel, spring steel

© Copyright 2016 DEPARTMENT OF STANDARDS MALAYSIA

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© STANDARDS MALAYSIA 2016 - All rights reserved i

Contents

Page Committee representation ..................................................................................................... ii Foreword .............................................................................................................................. iii 1 Scope ....................................................................................................................... 1 2 Normative references ................................................................................................ 1 3 Designation of grade ................................................................................................. 2 4 Method of manufacture ............................................................................................. 2 5 Chemical composition ............................................................................................... 3 6 Appearance, shape, dimensions and tolerances ....................................................... 4 7 Decarburisation ........................................................................................................ 7 8 Tests ........................................................................................................................ 9 9 Inspection ................................................................................................................. 9 10 Marking .................................................................................................................. 10 11 Report .................................................................................................................... 10

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ii © STANDARDS MALAYSIA 2016 - All rights reserved

Committee representation The Industry Standards Committee on Metallic Materials and Semi-Finished Products (ISC P) under whose authority this Malaysian Standard was developed, comprises representatives from the following organisations: Association of Consulting Engineers Malaysia Association of Marine Industries of Malaysia Construction Industry Development Board Malaysia Department of Standards Malaysia Federation of Malaysian Manufacturers IKRAM QA Services Sdn Bhd Institute of Materials Malaysia Jabatan Kerja Raya Malaysia Malaysia Steel Association Malaysia Steel Institute Malaysian Iron and Steel Industry Federation Master Builders Association Malaysia Ministry of International Trade and Industry Pertubuhan Akitek Malaysia SIRIM Berhad (National Centre for Machinery and Tooling Technology) SIRIM Berhad (National Precision Tooling (M) Sdn Bhd) SIRIM Berhad (Secretariat) SIRIM QAS International Sdn Bhd The Institution of Engineers, Malaysia Universiti Malaya Universiti Sains Malaysia Universiti Teknologi Malaysia The Technical Committee on Alloy Steels which developed this Malaysian Standard consist of representatives from the following organisations: Amsteel Mills Sdn Bhd

Ann Joo Steel Berhad

BlueScope Steel (Malaysia) Sdn. Bhd

IKRAM QA Services Sdn Bhd

Kanzen Tetsu Group

Malaysian Iron and Steel Industry Federation

SIRIM Berhad (Secretariat)

SIRIM QAS International Sdn Bhd (Testing Services Department - Civil and Construction Section)

SIRIM QAS International Sdn Bhd (Testing Services Department - Technical and Calibration Section)

SKF Bearing Industries (M) Sdn Bhd

Southern Steel Berhad

SuperInox Pipe Industry Sdn Bhd

Universiti Islam Antarabangsa Malaysia

Universiti Kebangsaan Malaysia

Universiti Sains Malaysia

Co-opted member: Malaysia Steel Institute

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© STANDARDS MALAYSIA 2016 - All rights reserved iii

Foreword This Malaysian Standard was developed by the Technical Committee on Alloy Steels under the authority of the Industry Standards Committee on Metallic Materials and Semi-Finished Products. Compliance with a Malaysian Standard does not itself confer immunity from legal obligations.

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© STANDARDS MALAYSIA 2016 - All rights reserved 1

Alloyed spring steels - Specification 1 Scope This Malaysian Standard specifies the alloyed spring steels (hereafter referred to as “steels”) mainly used for the hot-formed springs such as the laminated springs, coiled springs and torsion bar springs. 2 Normative references The following normative references are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the normative reference (including any amendments) applies. MS 1846, Steel and steel products - General technical delivery requirements (First revision) MS 2247:2009 (P), Carbon steels for machine structural use MS ISO 6506-2, Metallic materials -- Brinell hardness test -- Part 2: Verification and calibration of testing machines MS ISO 6508-1, Metallic materials -- Rockwell hardness test -- Part 1: Test method MS ISO 6892-1, Metallic materials -- Tensile testing -- Part 1: Method of test at room temperature JIS G 0320, Standard test method for heat analysis of steel products JIS G 0321:2010, Product analysis and its tolerance for wrought steel JIS G 0415:2015, Steel and steel products - Inspection documents JIS G 0551, Steels - Micrographic determination of the apparent grain size JIS G 0553, Steel - Macroscopic examination by etching JIS G 0555, Microscopic testing method for the non-metallic inclusions in steel JIS G 0558, Steels - Determination of depth of decarburization JIS G 0561, Method of hardenability test for steel (End quenching method) JIS G 0901, Classification of structural rolled steel plate and wide flat for building by ultrasonic test JIS G 3191, Dimensions, mass and permissible variations of hot rolled steel bars and bar in coil JIS G 3194, Dimensions, mass and permissible variations of hot-rolled flat steel

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2 © STANDARDS MALAYSIA 2016 - All rights reserved

JIS Z 2320-1, Non-destructive testing - Magnetic particle testing - Part 1: General principles JIS Z 2344, General rule of ultrasonic testing of ultrasonic testing of metals by pulse echo technique 3 Designation of grade The steels shall be classified into 8 grades, and their designations shall be as given in Table 1.

Table 1. Designation of grade

Designation of grade Remarks

SUP6 Silicon manganese steels Mainly used for laminated

spring, coiled spring and torsion bar spring

SUP7 SUP9 Manganese chromium

steels SUP9A SUP10 Chromium vanadium

steels Mainly used for coiled spring and torsion bar spring

SUP11A Manganese chromium boron steels

Mainly used for large laminated spring, coiled spring and torsion bar spring.

SUP12 Silicon chromium steels Mainly used for coiled spring.

SUP13 Chromium molybdenum steels

Mainly used for large laminated spring and coil spring.

4 Method of manufacture The method of manufacture shall be as follows: a) The steels shall be manufactured from killed steel. b) Steels shall be rolled or forged as the forming ratio of 4S or over unless otherwise specified. In the case where the forming ratio of steels for rolling or forging is less than 4S, it shall be upon the agreement between the purchaser and the manufacturer. NOTE. S means the ratio of bend radius (radius curvature) to the thickness of flat sample.

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c) The hot-rolled steels, unless otherwise specified, shall be as rolled. d) The cold-worked steels shall be supplied in such a way that the hot-rolled steels shall be

hot-rolled then cold-worked, and shall be manufactured by cold-drawing, cutting, grinding or any combination thereof according to the specification.

5 Chemical composition The steels shall be subjected to the test of 8.1 and their cast analysis values shall be given in Table 2. When the product analysis values of steels are requested by the purchaser, the test of 8.1 shall be performed, and the tolerances corresponding to Table 2 shall be given in Table 4 of JIS G 0321. Elements not specified in this table shall not be intentionally added for purposes other than finishing the molten steel.

Table 2. Chemical composition Unit in percentage

Designation of grade C Si Mn Pa) Sa) Cu Cr Mo V B

SUP6 0.56 to 0.64

1.50 to 1.80

0.70 to 1.00

0.030 max.

0.030 max.

0.30 max - - - -

SUP7 0.56 to 0.64

1.80 to 2.20

0.70 to 1.00

0.030 max.

0.030 max

0.30 max - - - -

SUP9 0.52 to 0.60

0.15 to 0.35

0.65 to 0.95

0.030 max.

0.030 max

0.30 max

0.65 to 0.95

- - -

SUP9A 0.56 to 0.64

0.15 to 0.35

0.70 to 1.00

0.030 max.

0.030 max

0.30 max

0.70 to 1.00

- - -

SUP10 0.47 to 0.55

0.15 to 0.35

0.65 to 0.95

0.030 max.

0.030 max

0.30 max

0.80 to 1.10

- 0.15 to 0.25

-

SUP11A 0.56 to 0.64

0.15 to 0.35

0.70 to 1.00

0.030 max.

0.030 max

0.30 max

0.70 to 1.00

- - 0.0005 min

SUP12 0.51 to 0.59

1.20 to 1.60

0.60 to 0.90

0.030 max.

0.030 max

0.30 max

0.60 to 0.90

- - -

SUP13 0.56 to 0.64

0.15 to 0.35

0.70 to 1.00

0.030 max.

0.030 max

0.30 max

0.70 to 0.90

0.25 to 0.35

- -

a) The values of P and S may be specified to be not more than 0.035 % upon the agreement between the purchaser and the manufacturer.

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6 Appearance, shape, dimensions and tolerances 6.1 Appearance The steels shall be well-finished and free from defects detrimental to practical use. However, for the steels furnished in coil form, the detection of defects for the whole length is generally difficult and since there is no chance to remove them, the steels sometimes may include defective parts. Therefore, the treatment for the defective part, if necessary, shall be upon the agreement between the purchaser and the manufacturer. 6.2 Standard for removing defects and allowable limit of remaining defects for steels The standard for removing defects and allowable limit of remaining defects for steels shall be upon the agreement between the purchaser and the manufacturer. 6.3 Shape, dimensions and tolerances 6.3.1 Round bar, wire rod and wire 6.3.1.1 Hot-rolled steels The standard dimension for the hot-rolled steels (round bar and wire rod) to be hot-formed into springs shall be as given in Table 3, and the dimensional tolerances shall be as given in Table 4. The dimensions and tolerances for the steels which are subjected to cold-drawing, cutting, etc. shall be as specified in clause 6 of MS 2247:2009 (P). For the wire rod, of 32 mm or less in diameter is applicable, in general.

Table 3. Standard dimension (diameter) for hot-rolled steels (hot-forming into springs as it is)

9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 25 26 28 30 32 34 36 38 40 42 44 45 46 48 50 53 55 56 60 63 65 70 75 80

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Table 4. Tolerances on hot-rolled steels (hot-forming into springs as it is)

Dimensions in millimetres

Diameter, Ø Tolerances Deviation a)

Ø < 10 ± 0.20 0.20 max 10 ≤ Ø < 16 ± 0.25 0.25 max 16 ≤ Ø < 21 ±0.30 0.30 max 21 ≤ Ø < 34 ±0.40 0.40 max 34 ≤ Ø < 46 ±0.50 0.50 max 46 ≤ Ø < 75 ±0.70 0.70 max 75 ≤ Ø ≤ 80 ±1.00 1.00 max NOTE. The dimensions other than those in this table to be agreed between the purchaser and the manufacturer. a)

The deviation means the difference between the minimum diameter and the maximum diameter at the single section of round bar.

6.3.1.1.1 The tolerances on length for the round bar shall be +40−0 mm to the specified

dimension by the purchaser unless otherwise agreed between the purchaser and the manufacturer. 6.3.1.1.2 The camber for the round bar shall not be more than 3 mm in any 1 m length, and not more than 3 mm X ( )

or less, for the total length. 6.3.1.2 Cold-worked steels. The standard dimension for the cold-worked steels (round bar and wire) shall be as given in Table 5, and the tolerances shall be as given in Table 6. For the wire rod of 14 mm or less in diameter is applicable, in general.

Table 5. Standard dimension (diameter) for cold-worked steels

Dimensions in millimetres 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 16.5 17 17.5 18 18.5 19 20 21 22 24 25 26 28 30 32 34 36 38 40 42 44 45 46 48 50 53 55 56 60 63 65 70 75 80

6.3.1.2.1 The tolerances on length for the round bar shall be +25−0 mm to the specified

dimension by the purchaser unless otherwise agreed between the purchaser and the manufacturer. 6.3.1.2.2 The dimensions other than those in Table 5 shall be upon the agreement between the purchaser and the manufacturer.

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Table 6. Tolerances for cold-worked steels

Dimensions in millimetres Diameter, Ø Tolerances Deviation a)

Ø < 12.5 ± 0.06 0.06 max 12.5 ≤ Ø < 26 ± 0.08 0.08 max 26 ≤ Ø < 48 ±0.10 0.10 max 48 ≤ Ø < 80 ±0.15 0.15 max a)

The deviation means the difference between the minimum diameter and the maximum diameter at the single section of round bar.

6.3.2 Flat steel The shape, dimensions and tolerances of the flat steel shall be as follows. 6.3.2.1 Profile of section

Key b Width of flat steel R Profile of round edge (curvature radius) t Thickness of flat steel

Figure 1. Profile of section of flat steel The profile of section of flat steel shall be as given in Figure 1. The profile of section other than that in Figure 1 shall be upon the agreement between the purchaser and the manufacturer. 6.3.2.2 Standard dimension and tolerances The standard dimension and the tolerances of flat steel shall be as given in Table 7. 6.3.2.2.1 The thickness shall be measured at both ends of the width, and the difference between the thicknesses at both ends shall not be more than 25 % of the range of tolerances on thickness specified in this table (however, the minimum value is 0.10 mm). Both surfaces shall not be convex. 6.3.2.2.2 The profile of both edges of width shall be the round edge. However, this R may be substituted with the numerical value upon the agreement between the purchaser and the manufacturer.

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6.3.2.2.3 The tolerances on length of the flat steel shall be +40

−0 mm to the dimension specified by the purchaser unless otherwise agreed between the purchaser and the manufacturer. 6.3.2.3 Camber The camber for steel flats shall be not more than 15 mm in any 5 m length and also shall not exceed 3 mm in any 1 m at arbitrary portion. NOTE. The definition of camber is such that the maximum deviation c of edge from the line connecting both edges of product or the line connecting arbitral two points as given in Figure 2.

Key b Width of flat steel l Length of flat steel or distance between any two points of edge c camber

Figure 2. Camber of steel flat 7 Decarburisation The steels shall be free from decarburisation that is detrimental to practical use. The allowable limit for the decarburisation depth may be upon the agreement between the purchaser and the manufacturer, in which the measuring method of the decarburisation depth shall be as specified in 8.2.

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Table 7. Standard dimension and tolerances for flat steel Dimensions in millimetres

Width, b

Tolerances on width

Thickness, t

5 6 7 8 9 10 11 12 13 14 16 18 20 22 25 30

Tolerances on thickness

45 ± 0.50 ± 0.15 ± 0.15 ± 0.25

50 ± 0.60 ± 0.15 ± 0.15 ± 0.18 ± 0.20 ± 0.20 ± 0.25 ± 0.25 ± 0.25 ± 0.30

60 ± 0.60 ± 0.15 ± 0.15 ± 0.18 ± 0.20 ± 0.20 ± 0.25 ± 0.25 ± 0.30 ± 0.30 ± 0.35

70 ± 0.80 - ± 0.18 ± 0.18 ± 0.20 ± 0.25 ± 0.25 ± 0.25 ± 0.30 ± 0.30 ± 0.30 ± 0.35 ± 0.35 ± 0.40 ± 0.45 ± 0.50

80 ± 0.80 - - ± 0.20 ± 0.20 ± 0.25 ± 0.25 ± 0.30 ± 0.30 ± 0.30 ± 0.30 ± 0.35 ± 0.35 ± 0.40

90 ± 1.00 - - - ± 0.25 ± 0.25 ± 0.30 ± 0.30 ± 0.30 ± 0.30 ± 0.35 ± 0.35 ± 0.40 ± 0.45 ± 0.50

100 ± 1.00 - - - ± 0.30 ± 0.30 ± 0.30 ± 0.30 ± 0.35 ± 0.35 ± 0.40 ± 0.45 ± 0.50

150 ± 1.00 - - - ± 0.40 ± 0.40 ± 0.50 ± 0.50

NOTE. The dimensions other than those in this table to be agreed between the purchaser and the manufacturer.

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8 Tests 8.1 Chemical analysis test The chemical analysis test shall be as follows: a) The general requirements for chemical analysis test and the sampling method for cast

analysis shall be as specified in MS 1846. b) The sampling method for product analysis shall be as specified in Clause 4 of

JIS G 0321:2010. c) The cast analysis method shall be as specified in JIS G 0320 and the product analysis

method shall be as specified in JIS G 0321:2010. 8.2 Method of measuring decarburised depth The method of measuring the decarburised depth shall be as specified in JIS G 0558. Unless otherwise specified, the measurement by microscope, among other methods, specified in JIS G 0558 shall apply. 8.3 Other tests Upon agreement between the purchaser and the manufacturer, the purchaser may designate the following tests, provided that the sampling method of specimen, test method and others shall preliminarily be agreed with the manufacturer. Tests conducted are on grain size, macrostructure, non-metallic inclusions, hardenability, magnetic particle, ultrasonic, mechanical properties and microstructure inspections. The testing methods shall be as follows, respectively. Grain size JIS G 0551 Macrostructure JIS G 0553 Non-metallic inclusions JIS G 0555 Hardenability JIS G 0561 Magnetic particle JIS Z 2320-1 Ultrasonic JIS G 0901, JIS Z 2344 Mechanical properties MS ISO 6892-1, MS ISO 6506-2

MS ISO 6508-1 The testing method of microstructure shall be upon the agreement between the purchaser and the manufacturer. 9 Inspection The inspection shall be as follows: a) General items for inspection shall be as specified in MS 1846;

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b) The chemical composition shall comply with Clause 5;

c) The appearance, shapes, dimensions and tolerances shall comply with Clause 6;

d) Decarburisation shall comply with Clause 7; and

e) Other inspections when either of the tests specified in 8.3 is performed, the test result shall comply with the criteria of acceptance upon agreement between the purchaser and the manufacturer.

10 Marking The marking on each steel shall be done with the following items by, a suitable method. The round bar, wire rod, wire, and flat steel that having a diameter less than 30 mm may be bound up and the marking may be made on each bundle by a suitable method. However, the hot-rolled steel round bar with diameter of 30 mm or more shall be legibly marked on each product individually. A part of following particulars may be omitted when agreed upon between the purchaser and the manufacturer: a) Designation of grade.

b) Heat number or manufacturing number,

c) Manufacturer’s name or its identifying brand.

d) Method of marking dimensions shall be as specified in JIS G 3191 or JIS G 3194. However,

the expression method of wire rod shall be as the method of dimension expression method of bar-in-coil as specified in JIS G 3191.

11 Report The report shall comply with the requirement as specified in MS 1846. However, unless otherwise specified at the time of ordering, the type of inspection document shall comply with standard designation 2.3 or 3.1B in Table 1 of JIS G 0415:2015. Further, the report of Clause 9 e) shall be upon the agreement between purchaser and the manufacturer.

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© STANDARDS MALAYSIA 2016 - All rights reserved

Acknowledgements Members of Technical Committee on Alloy Steels Prof Dr Mohd Abd Maleque (Chairman) Ms Nageswary S Iyampillai (Secretary) Mr Yee Sen Tat Mr Ng Beng Fooi Mr. Jack Chum Mr Azman Idris Mr Mark Lim Mr Mohd Azlan Mat Isa Mr Dalha Rahmat Ms Chua Seok Cheng Assoc Prof Dr Zainuddin Sajuri Prof Dr Ahmad Badri Ismail Co-opted members Ms Lee Hooi Lan

Universiti Islam Antarabangsa Malaysia SIRIM Berhad Amsteel Mills Sdn Bhd Ann Joo Steel Berhad BlueScope Steel (Malaysia) Sdn. Bhd IKRAM QA Services Sdn Bhd Malaysian Iron and Steel Industry Federation SIRIM QAS International Sdn Bhd (Testing Services Department - Civil and Construction Section Testing) SIRIM QAS International Sdn Bhd (Testing Services Department - Technical and Calibration Section) Southern Steel Berhad Universiti Kebangsaan Malaysia Universiti Sains Malaysia Malaysia Steel Institute

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© Copyright 2016 All rights reserved. No part of this publication may be reproduced or utilised in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the Department of Standards Malaysia.

Documents

DRAFT MALAYSIAN 15P004R0 STANDARD - SIRIM€¦ · SIRIM Berhad (National Centre for ... MS ISO 6508-1, Metallic materials -- Rockwell hardness test -- Part 1: Test method MS ISO 6892-1,