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Low-temperature seamless steel pipe standard

Standard:
GB / T 18984-2003

Uses:
Applicable -45 ~ -100 ℃ at low temperature pressure vessels and low temperature heat exchanger pipe.

Main production steel grade:
09DG, 16MnDG

Mechanical behavior:

Grade

Rm (MPa)

ReL (MPa)

A (%)

Impact test

T ( ° C )

Kv (J)

16MnDG

490 ~ 665

≥ 315

≥ 30

-45

≥ 34

10MnDG

400

≥ 240

≥ 35

-45

≥ 34

09D

385

≥ 240

≥ 35

-45

≥ 47

09Mn2VDG

450

≥ 300

≥ 30

-70

≥ 47

 

chemical composition:

Grade

C

Si

Mn

P

S

V

16MnDG

0.12 ~ 0.20

0.20 ~ 0.55

1.20 ~ 1.60

≤0.025

≤0.025

≤0.03

10MnDG≤0.130.17 ~ 0.37≤1.35≤0.025≤0.025≤0.07
09D≤0.120.17 ~ 0.370.95 ~ 1.35≤0.025≤0.025≤0.07
09Mn2VDG≤0.120.17 ~ 0.37≤1.85≤0.025≤0.025≤0.12

 

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