Implementation standard: ASTM A333 (2004) --- Seamless steel pipe for low temperature (American standard)
GB18984 (2003) --- Seamless steel pipes for cryogenic pipelines (national standard)
Product application: Suitable for -45℃～-195℃ low-temperature pressure vessel pipes and seamless steel pipes for low-temperature heat exchanger pipes
Chemical composition of low temperature steel pipe
| Standard |
Grade |
Chemical composition（%） |
| C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Al |
| GB/T18984 |
16MnDG |
0.12～0.20 |
0.20～0.55 |
1.20～1.60 |
≤0.025 |
≤0.025 |
|
|
|
|
|
|
| 10MnDG |
≤0.13 |
0.17～0.37 |
≤1.35 |
≤0.025 |
≤0.025 |
|
|
|
|
≤0.07 |
|
| 09DG |
≤0.12 |
0.17～0.37 |
≤0.95 |
≤0.025 |
≤0.025 |
|
|
|
|
≤0.07 |
|
| 09Mn2VDG |
≤0.12 |
0.17～0.37 |
≤1.85 |
≤0.025 |
≤0.025 |
|
|
|
|
≤0.12 |
|
| 06Ni3MoDG |
≤0.08 |
0.17～0.37 |
≤0.85 |
≤0.025 |
≤0.025 |
|
2.5～3.7 |
|
0.15～0.30 |
≤0.05 |
|
| ASTM A333 |
Grade1 |
≤0.30 |
-- |
0.40～1.06 |
≤0.025 |
≤0.025 |
|
|
|
|
|
|
| Grade3 |
≤0.19 |
0.18～0.37 |
0.31～0.64 |
≤0.025 |
≤0.025 |
|
3.18～3.82 |
|
|
|
|
| Grade4 |
≤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 |
| Grade6 |
≤0.30 |
≥0.10 |
0.29～1.06 |
≤0.025 |
≤0.025 |
|
|
|
|
|
|
| Grade7 |
≤0.19 |
0.13～0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
|
2.03～2.57 |
|
|
|
|
| Grade8 |
≤0.13 |
0.13～0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
|
8.40～9.60 |
|
|
|
|
| Grade9 |
≤0.20 |
-- |
0.40～1.06 |
≤0.025 |
≤0.025 |
|
1.60～2.24 |
0.75～1.25 |
|
|
|
| Grade10 |
≤0.20 |
0.10～0.35 |
1.15～1.50 |
≤0.035 |
≤0.015 |
≤0.15 |
≤0.25 |
≤0.015 |
≤0.50 |
≤0.12 |
≤0.06 |
| Grade11 |
≤0.10 |
≤0.35 |
≤0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
35.0～37.0 |
|
≤0.50 |
|
|
Mechanical properties of low temperature steel pipe
| Standard |
Grade |
Minimum impact test temperature |
tensile strengthMpa |
Yield Strength |
Elongation% |
| F |
℃ |
Portrait |
Horizontal |
| ASTM A333 |
Grade1 |
-50 |
-45 |
≥380 |
≥205 |
≥35 |
≥25 |
| Grade3 |
-150 |
-100 |
≥450 |
≥240 |
≥30 |
≥20 |
| Grade4 |
-150 |
-100 |
≥415 |
≥240 |
≥30 |
≥16.5 |
| Grade6 |
-50 |
-45 |
≥415 |
≥240 |
≥30 |
≥16.5 |
| Grade7 |
-100 |
-75 |
≥450 |
≥240 |
≥30 |
≥22 |
| Grade8 |
-320 |
-195 |
≥690 |
≥515 |
≥22 |
|
| Grade9 |
-100 |
-75 |
≥435 |
≥315 |
≥28 |
|
| Grade10 |
-75 |
-60 |
≥550 |
≥450 |
≥22 |
|
| Grade11 |
|
|
≥450 |
≥240 |
≥18 |
|
| GB/T18984 |
16MnDG |
|
-45 |
490～665 |
≥315 |
≥30 |
| 10MnDG |
|
-45 |
≥400 |
≥240 |
≥35 |
| 09DG |
|
-45 |
≥385 |
≥210 |
≥35 |
| 09Mn2VDG |
|
-70 |
≥450 |
≥300 |
≥30 |
| 06Ni3MoDG |
|
-100 |
≥455 |
≥250 |
≥30 |
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