ผลิตภัณฑ์โลหะ
เอกสารมาตรฐาน
ญี่ปุ่น
JSA
JIS G 3221:1988
Chromium molybdenum steel forgings for general use
1988
13
Std. JISf 2021 V.2
This Japanese Industrial Standard specifies the chromium molybdenum steel forgings hereinafter referred to as the "steel forgings", formed into rod, ring and disc shapes for general use as rods, shafts, cranks, pinions, gears, flanges, rings, wheels, discs, etc.