This standard specifies high-strength chromium-molybdenum steel forgings (hereinafter referred to as forgings) used in pressure vessels used at high temperatures.
JIS G 3206:1993 history
2008JIS G 3206 AMD 1:2008 High strength chromium-molybdenum alloy steel forgings for pressure vessels under high-temperature service (Amendment 1)
1993JIS G 3206:1993 High strength chromium-molybdenum alloy steel forgings for pressure vessels under high-temperature service