久久国产福利一区二区-久久强奷乱码老熟女网站-欧美裸体xxxx极品-午夜精品久久久久久99热-国产精品免费无码二区

標(biāo)準(zhǔn)

牌號(hào)

抗拉強(qiáng)度
(MPa)

屈服強(qiáng)度(MPa) ≥

延伸率(%)
≥

≤16

>16mm

GB/T8163-1999

10

335-475

205

195

24

20

410-550

245

235

20

Q295

430-610

295

285

22

Q345

490-665

325

315

21

標(biāo)準(zhǔn)

牌號(hào)

C

Si

Mn

P≤

S≤

Ni≤

Cu≤

Cr≤

GB/T8163-1999

10

0.07-0.14

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.15

0.25

20

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.25

0.25

Q295 A

≤0.16

≤0.55

0.80-1.50

0.045

0.045

0.30

0.30

0.30

Q295 B

≤0.16

≤0.55

0.80-1.50

0.040

0.040

0.30

0.30

0.30

Q345 A

≤0.20

≤0.55

1.00-1.60

0.045

0.045

0.30

0.30

0.30

Q345 B

≤0.20

≤0.55

1.00-1.60

0.040

0.040

0.30

0.30

0.30

Q345 C

≤0.20

≤0.55

1.00-1.60

0.035

0.035

0.30

0.30

0.30

Q345 D

≤0.18

≤0.55

1.00-1.60

0.030

0.030

0.30

0.30

0.30

Q345 E

≤0.18

≤0.55

1.00-1.60

0.025

0.025

0.30

0.30

0.30