뜨거운 끝난 연약한 강철 배관

Element

Permissible maximum content in the cast analysis
% by mass

Permissible deviation of the product analysis from specified limits for the cast analysis
% by mass

C a

≤0.20

﹢0.02

＞0.20

﹢0.03

Si

≤0.60

﹢0.05

Mn

Non-alloy ≤1.60

﹢0.10

Fine grain ≤1.70

﹣0.05

﹢0.10

P

Non-alloy ≤0.040

﹢0.010

Fine grain ≤0.035

﹢0.005

S

Non-alloy ≤0.040

﹢0.010

Fine grain ≤0.030

﹢0.005

Nb

≤0.060

﹢0.010

V

≤0.20

﹢0.02

Ti

≤0.03

﹢0.01

Cr

≤0.30

﹢0.05

Ni

≤0.80

﹢0.05

Mo

≤0.10

﹢0.03

Cu

≤0.35

﹢0.04

0.35＜Cu≤0.70

﹢0.07

N

≤0.025

﹢0.002

AItotal

≥0.020

﹣0.005

a For S235JRH in thicknesses ≤16mm, the permissible deviation=0.04%C,and for thicknesses＞16mm and ≤40mm the permissible deviation=0.05%C