This standard specifies heat-treated (quenched and tempered) alloy steel forgings (hereinafter referred to as forgings) that are used for pressure vessels and their parts, taking into account weldability.
JIS G 3204:1988 history
2008JIS G 3204 AMD 1:2008 Quenched and tempered alloy steel forgings for pressure vessels (Amendment 1)
1988JIS G 3204:1988 Quenched and tempered alloy steel forgings for pressure vessels