Seamless Heavy Wall Steel Tubing ASTM A333A333M
A333/A333M Seamless and Welded Steel Pipe for Low-Temperature Service
Material: Carbon and Alloy Steel, ferritic steel
Grade 1A, Grade3, Grade 4, Grade 6A, Grade 7A
Grade Gr 1A 3 4 6A 7A Chemical Requirements
|
Element |
Composition,% |
||||
|
Grade 1A |
Grade 3 |
Grade 4 |
Grade 6A |
Grade 7A |
|
|
Carbon, max |
0.30 |
0.19 |
0.12 |
0.30 |
0.19 |
|
Manganese |
0.40-1.06 |
0.31-0.64 |
0.50-1.05 |
0.29-1.06 |
0.90max |
|
Phosphorus,max |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
|
Sulfur,max |
0.025 |
0.025 |
0.025 |
0.025 |
0.025 |
|
Silicon |
- |
0.18-0.37 |
0.18-0.37 |
0.10min |
0.13-0.32 |
|
Nickel |
- |
3.18-3.82 |
0.47-0.98 |
- |
2.03-2.57 |
|
Chromium |
- |
- |
0.44-1.01 |
- |
- |
|
Copper |
- |
- |
0.40-0.75 |
- |
- |
|
Aluminum |
- |
- |
0.04-0.30 |
- |
- |
|
Vanadium,max |
- |
- |
- |
- |
- |
|
Columbium,max |
- |
- |
- |
- |
- |
|
Molybdenum,max |
- |
- |
- |
- |
- |
|
Cobalt |
- |
- |
- |
- |
- |
A For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be pemitted to a maximum of 1.35% manganese.
Manufacture:
The pipes are manufactured by seamless and welding process with the addition of no filler metal in the welding operation.
Grade 4 is manufactured by seamless process
Heat treatment:
All seamless and welded pipes, other than Grades 8 and 11, are heat treated to control their microstructure in accordance with methods of:
- Normalizing
- Quenched and Tempered
- Double Normalized and Tempeed
Impact Temperature
|
Grade |
Minimum Impact Test Temperature |
|
|
°F |
°C |
|
|
1 |
-50 |
-45 |
|
3 |
-150 |
-100 |
|
4 |
-150 |
-100 |
|
6 |
-50 |
-45 |
|
7 |
-100 |
-75 |
|
8 |
-320 |
-195 |
|
9 |
-100 |
-75 |
|
10 |
-75 |
-60 |
|
11 |
-320 |
-195 |
Tests and Inspection:
Tensile Requirements
Impact Requirements
Mechanical Teing
- Sampling
- Transverse or Longitudinal Tensile Test and Flattening Test
- Hydrostatic Test
- Impact Test
Key words:
low;low temperature service;seamless steel pipe;stainless steel pipe;steel pipe; temperature service
applications
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