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Si

Mn

P

S

Cu

Ni

Cr

Mo

Nb

V

Al

0.11

0.15-0.5

1.1-1.5

0.02

0.01

0.3-0.4

0.25-0.4

0.4-0.7

0.1

0.01-0.05

0.01-0.06

0.015-0.05

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485MPa

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