grade

chemical composition %

Mechanical property

C

SI

Mn

P

S

Ceq

Yield strength

Tensile strength

Elongation

ÓS(Mpa)

Ób(Mpa)

A%

Q195

0.06-0.16

≤0.30

0.25-0.50

≤0.050

≤0.045

≥195

315-430

≥33%

Q215A

0.09-0.15

≤0.30

0.25-0.55

≤0.050

≤0.045

≥215

≥375

≥27

Q215B

≤0.045

Q235A

0.14-0.22

≤0.30

0.30-0.65

≤0.050

≤0.045

≥235

≥410

≥23

Q235B

0.12-0.20

0.30-0.70

≤0.045

SAE1006

≤0.08

≤0.10

0.25-0.40

≤0.04

≤0.05

SAE1008

≤0.10

≤0.10

0.30-0.50

≤0.05

≤0.04

H08A

≤0.10

≤0.03

0.30-0.60

≤0.030

≤0.030

≥330

410-550

≥22

ER50-6

0.06-0.15

0.80-1.15

1.40-1.85

≤0.025

≤0.035

≥420

≥500

≥22

Notes: For H08A: Cu≤0.20, Ni≤0.30  For ER50-6: Cu≤0.20