Metal & Oil & Gas News – 
Yaang Steel offer an extensive range of Seamless steel pipes for low temperature sevice. Low temperature service seamless pipes are application for low-temperature pressure container piping by the main standard GB/T18984-2003, ASTM/ASME A/SA333 with steel grade 16MnDG, 10MnDG, A333 Gr.1, A333 Gr.6, A333Gr.3.
GB/T18984-2003 standard suitable for -49 to -148 degrees F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.
ASTM/ASME A/SA-333 Grades allow for cold temperature service to minus 150 degrees F. Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.
This specification covers seamless and welded steel pipe for low temperature service. The Grade 6 alloy steel involved is similar to AISI 4032 low alloy steel.
Sizes
1/4” Nominal to 24”O.D.
Wall Thickness – Schedule 10 through XXH
Low Temperature Steel Pipe Specifications & Grades
- SA333 & A333 – Grades 1, 3, & 6
- GB/T18984-2003 – 16MnDG, 10MnDG
Chemical Composition(%)
| 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 | – | – | – |
Mechanical Properties
| 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 | |
