国内的可以用09DR代替,它的原材料标准是ASTM A333 等级为GR。6,管道配件标准就是ASTM A420 。呵呵呵
ASTM A420/A420M–01Standard Specification for Piping Fittings of Wrought Carbon Steel andAlloy Steel for Low-Temperature Service
低温下用锻制碳素钢和合金钢管配件
WPL - wrought product for low temp service
SA420 WPL 6是该标准中一个等级的钢种
材质含量要求为:
C:0.30
Mn: 0.60–1.35
P: 0.035
S: 0.040
Si: 0.15–0.40
Ni: 0.40
Cr: 0.30
Mo: 0.12
Cu: 0.40
Cb: 0.02
V: 0.08