Standard No.:	GB/T 1222-2007
English Name:	Spring steels
Chinese Name:	弹簧钢
Chinese Classification:	H40    Steel and iron products in general
Professional Classification:	GB    National Standard
ICS Classification:	77.140.25 77.140.25    Spring steels 77.140.25
Issued by:	AQSIQ,SAC
Issued on:	2007-8-14
Implemented on:	2008-3-1
Status:	abolished
Superseded by:	GB/T 1222-2016 Spring steels
Superseded on:	2017-9-1
Abolished on:	2017-09-01
Superseding:	GB/T 1222-1984 GB 1222-1984 Spring steels
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

This standard specifies the order contents, dimension, shape, weight, allowable variation, technical requirements, test methods, test rules, packing, marking and quality certificate of hot-rolled, forged and cold drawn spring steel. This standard is applicable to the round spring steel with diameter no larger than 100mm, square steel with side length no larger than 100mm (hereinafter referred to as steel bar), flat spring steel with thickness no larger than 40mm and spring steel wire rod with diameter no larger than 25mm [excluding the wire rod for oil hardening-tempering steel spring wire (YB/T 5365)]. According to the consultation by the supplier and the purchaser, steel bar with diameter or side length greater than 100mm, flat steel with thickness 40mm and wire rod with diameter greater than 25mm can also be supplied. The designation and chemical composition specified in this standard are also applicable to ingot steel, steel billet and their products.

Foreword I 1 Scope 2 Normative References 3 Order Contents 4 Dimension, Shape, Weight and Permissible Deviation 5 Technical Requirements 6 Test Methods 7 Test Rules 8 Packing, Marking and Quality Certificate Annex A (Normative) Size, appearance and permissible deviation of flat hot rolled bar Annex B (Normative) 28 MnSiB Technical Conditions Annex C (Informative Annex) Characteristic Value of 28 Music

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