This standard specifies carbon steel and alloyed copper forgings (hereinafter referred to as steel forgings) with consideration for weldability for use in pressure vessels used at low temperatures and their parts.
JIS G 3205:1988 history
2008JIS G 3205 AMD 1:2008 Carbon and alloy steel forgings for pressure vessels for low-temperature service (Amendment 1)
1988JIS G 3205:1988 Carbon and alloy steel forgings for pressure vessels for low-temperature service