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This specification covers seamless and welded steel pipe for low temperature service.
Seamless service for cryogenic service is applicable to 16MnDG, 10MnDG, A333 Gr.1, Gr.3, Gr.1 of main standard GB / T18984-2003, ASTM / ASME A / SA333.
Sunny Steel provides a wide range of seamless steel tubes for cryogenic services.
The GB / T18984-2003 standard is applicable to low temperature pressure vessel pipes from -49 to -148 degrees F and seamless steel tubes with low temperature heat exchange tubes.
The ASTM / ASME A / SA-333 level allows cryogenic service to be below 150 degrees Fahrenheit. Materials are always provided under standardized conditions and the Charpy impact is tested to a specific temperature range to ensure that the required service temperature is met.
| Grade | C | Si | Mn | P(max) | S | Ni | Mo | V |
| 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 |
| A333 Gr.1 | <=0.30 | - | 0.40-1.06 | 0.025 | 0.025 | - | - | - |
| A333 Gr.3 | <=0.19 | 0.18-0.37 | 0.31-0.64 | 0.025 | 0.025 | 3.18-3.82 | - | <=0.12 |
| A333 Gr.6 | <=0.30 | >=0.10 | 0.29-1.06 | 0.025 | 0.025 | - | - | - |
| Grade | Tensile strength | Lower yield strength（Rcl/Mpa） | Elongation | |
| Rm/Mpa | W.T.<=16mm | W.T.>16mm | A/% | |
| 16MnDG | 490-665 | >=325 | >=315 | >=30 |
| 10MnDG | >=400 | >=240 | >=35 | |
| A333 Gr.1 | >=205 | >=380 | >=35 | |
| A333 Gr.3 | >=450 | >=240 | >=30 | |
| A333 Gr.6 | >=455 | >=250 | >=30 | |