- ASTM A333 Grade 8 Ultra-low temperature steel pipe
- ASTM A333 Gr.9 Seamless Steel Pipe
- ASTM A333 Gr.4 Seamless Steel Pipe
- ASTM A333 Gr.10 Seamless Steel Pipe
- ASTM A333 Grade 6, Seamless Steel Pipe for Low-Temperature Service
- ASTM A333 Grade 3, Seamless Pipe for Low-Temperature Service
- ASTM A333 Grade 1, Seamless and Welded Steel Pipe for Low-Temperature Service.
- ASTM A333, Seamless and Welded Steel Pipe for Low-Temperature Service
This specification covers nominal (average) walled pipe almost exclusively in seamless.
Low Temperature Steel Pipe Specifications & Grades
- SA333 & A333 – Grades 1, 3, 6 & 8
- A671 CC65 CL22 EFW at -50°F (Welded Alternative to A333)
- Flanges: A/SA 350 LF2, LF3
- Fittings: A/SA-420 WPL6, WPL3
Size range
- 1/4” Nominal to 24”O.D.
- Wall Thickness – Schedule 10 through XXH
- Unscheduled heavy wall pipe thicknesses available up to 4 inches.
For low temperature
Production specification range of low temperature pipe products
Strike temperature condition：
| Crade | The lowest temperature for strike test | |
| ℉ | ℃ | |
| ASTM A333 Grade 1 | -50 | -45 |
| ASTM A333 Grade 6 | -50 | -45 |
Chemical Composition (%) of ASTM A333 steel pipe
| Grade | Tensile Strength (MPa） | Yield Point (MPa) | Elongation (%) | |
| Y | X | |||
| 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 | |
Mechanical requiremnts of ASTM A333 alloy pipe
| Grade | Chemical Composition (%) | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | |
| 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 | |||
Heat Treatment:
Grades 1 and 6 shall be heat treated to control their microstructure.
ASTM A333 Grade 6 and ASME SA 333 Grade 6 are heat treated to achieve normalized condition @ 920 degrees Celsius with controlled microstructure.
Production specification range of low temperature pipe products
Specific Impact requirements
|
No. |
Order No. |
Size description |
||
|
O.D.
/mm |
W.T.
/mm |
Legnth
/m |
||
|
1 |
A333 Gr.6
A333 Gr.6/X42NS
|
10-127 |
1-20 |
6-12.0 |
|
42-114.3 |
3.5-6 |
6-12.2 |
||
|
42-114.3 |
6-12 |
6-12.2 |
||
|
114.3-180 |
3.8-8 |
6-12.2 |
||
|
114.3-180 |
8-22 |
6-12.2 |
||
|
68-180 |
10-14 |
6-12.2 |
||
|
69-254 |
14-55 |
6-12.2 |
||
|
140-340 |
6-8 |
6-12.2 |
||
|
140-368 |
8-42 |
6-12.2 |
||
|
318-720 |
14-50 |
4-12.5 |
||
|
2 |
A333 Gr.6/X52QS |
42-114.3 |
3.5-12 |
6-12.2 |
|
114.3-180 |
3.8-22 |
6-12.2 |
||
|
68-254 |
10-40 |
6-12.2 |
||
|
140-368 |
6-40 |
6-12.2 |
||
|
318-720 |
14-40 |
4-12.5 |
||
|
140-368 |
6-25 |
6-12.2 |
||
|
318-720 |
14-25 |
4-12.5 |
||
|
3 |
16MnDG |
10-127 |
1-20 |
6-12.0 |
|
42-114.3 |
3.5-12 |
6-12.2 |
||
|
114.3-180 |
3.8-22 |
6-12.2 |
||
|
68-254 |
10-55 |
6-12.2 |
||
|
140-368 |
6-42 |
6-12.2 |
||
|
318-720 |
14-120 |
4-12.5 |
||
Specific Impact requirements
The raw material used for low temperature service pipe is ALUMINIUM killed with high proportion of manganese (more than 1%) combined with low proportions of carbon (less than 0.23%).For low temperature pipe to be certified as LTCS additional impact test should be conducted at low temperatures, as per mandatory requirements in section 8 of ASTM A 333.