級(jí)別

最低沖擊試驗(yàn)溫度

℉

℃

Grade 1

-50

-45

Grade 3

-150

-100

Grade 4

-150

-100

Grade 6

-50

-45

Grade 7

-100

-75

Grade 8

-320

-195

Grade 9

-100

-75

Grade 10

-75

-60

標(biāo)準(zhǔn)

牌號(hào)

抗拉強(qiáng)度（MPa）

屈服強(qiáng)度（MPa）

伸長(zhǎng)率（％）

縱向

橫向

ASTM A333

Grade 1

≥380

≥205

≥35

≥25

Grade 3

≥450

≥240

≥30

≥20

Grade 4

≥415

≥240

≥30

≥16.5

Grade 6

≥415

≥240

≥30

≥16.5

Grade 7

≥450

≥240

≥30

≥22

Grade 8

≥690

≥515

≥22

Grade 9

≥435

≥315

≥28

Grade 10

≥550

≥450

≥22

Grade 11

≥450

≥240

≥18

標(biāo)準(zhǔn)

牌號(hào)

化學(xué)成分（％）

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

Al

ASTM

A333

Grade 1

≤0.30

0.40-1.06

≤0.025

≤0.025

Grade 3

≤0.19

0.18-0.37

0.31-0.64

≤0.025

≤0.025

3.18-3.82

Grade 4

≤0.12

0.18-0.37

0.50-1.05

≤0.025

≤0.025

0.44-1.01

0.47-0.98

0.40-0.75

0.04-0.30

Grade 6

≤0.30

≥0.10

0.29-1.06

≤0.025

≤0.025

Grade 7

≤0.19

0.13-0.32

≤0.90

≤0.025

≤0.025

2.03-2.57

Grade 8

≤0.13

0.13-0.32

≤0.90

≤0.025

≤0.025

8.40-9.60

Grade 9

≤0.20

0.40-1.06

≤0.025

≤0.025

1.60-2.24

0.75-1.25

Grade 10

≤0.20

0.10-0.35

1.15-1.50

≤0.03

≤0.015

≤0.15

≤0.25

≤0.015

≤0.50

≤0.12

≤0.06

Grade 11

≤0.10

≤0.35

≤0.6

≤0.025

≤0.025

≤0.50

35.0-37.0

≤0.50