S275JR (≤40mm)
化學(xué)成分(質(zhì)量分?jǐn)?shù))/%
C≤0.21
Mn≤1.50
P≤0.045
S≤0.045
N≤0.009
S275JR (>40mm)
化學(xué)成分(質(zhì)量分?jǐn)?shù))/%
C≤0.22
Mn≤1.50
P≤0.045
S≤0.045
N≤0.009
S275JR (≤16mm)
化學(xué)成分(質(zhì)量分?jǐn)?shù))/%
C≤0.21
Mn≤1.50
P≤0.035
S≤0.035
Cu≤0.55
N≤0.012
其他:S275鋼
S275JR (>16---≤40mm)
化學(xué)成分(質(zhì)量分?jǐn)?shù))/%
C≤0.21
Mn≤1.50
P≤0.035
S≤0.035
Cu≤0.55
N≤0.012
其他:CEV≤0.40--≤0.44
S275JR (>40mm)
C≤0.22
Mn≤1.50
P≤0.035
S≤0.035
Cu≤0.55
N≤0.012
其他:(≤30--≤400mm)