Low Temperature Seamless Steel Pipe

GRADE

MINIMUM IMPACT TEST TEMPERATURE

℉

℃

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

-50

-45

Grade 10

-150

-100

STANDARD

GRADE

TENSILE STRENGTH(MPA)

MIN YIELD POINT(MPA)

ELONGATION (%)

Longitudinal

Transverse

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

STANDARD

GRADE

CHEMICAL COMPOSITION(％)

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