steel

Class I Chemical Composition (Mass Fraction) (%)

C Mn si P S Al Nb V

general

The intensity of

Steel A ≤.22 ≥2.5C.10 ~ 0.35 ≤.04 ≤0.04

B ≤ o.21.60 ~ 1.00

D ≤.21 0.60 ~ 1.00 ≥.015

E ≤.18.70 ~ 1.20 ≥0.015

high

strong

The degree of

Steel AH32 ≤.18.70 ~ 1.60 0.10 ~.50 ≤.04 ≤0.04 ≥.015

DH32 o. 90 ~ 1.60

EH32 o. 90 ~ 1.60

AH36 0.70 ~ 1.60 o. 015 ~ O.050 o. 03O ~ O.10

DHB6 0.90 ~ 1.60

EH36 o. 90 ~ 1.60