GB/T 1222-2007: Spring steels

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Scope

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-rod (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.

Basic Data

Standard ID	GB/T 1222-2007 (GB/T1222-2007)
Description (Translated English)	Spring steels
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H40
Classification of International Standard	77.140.25
Word Count Estimation	17,199
Date of Issue	2007-08-14
Date of Implementation	2008-03-01
Older Standard (superseded by this standard)	GB/T 1222-1984
Quoted Standard	GB/T 222; GB/T 223.3; GB/T 223.5; GB/T 223.11; GB/T 223.13; GB/T 223.18; GB/T 223.19; GB/T 223.23; GB/T 223.24
Regulation (derived from)	China National Standard Approval Announcement No. 8, 2007 (No. 108); National Standard Notice No. 321 of 2016
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the hot-rolled, forging, cold-drawn steel spring ordering content, dimensions, shape, test methods, , weight and tolerance, technical requirements for inspection rules, packaging, marking and quality certificate. This standard applies to grow in diameter or side l00 mm spring steel round and square steel (hereinafter referred to as the bar), thickness less than 40 mm of spring steel flat, diameter of not more than 25 mm of spring steel wire rod (not including oil quenched and tempered spring steel wire with a wire rod (YB/T 5365)). Negotiated by both supply and demand, but also supply diameter or length was longer than l00 mm rod, thickness greater than 40 mm in diameter greater than 25 mm flat steel and wire rod. Designation and chemical composition requirements of this standard also applies to the ingot, billets and its products.