ASTM A333 Grade 6 pipe is common use material for low temperature services in above -45℃
The standards includes manufacturing types in welding (ERW) and seamless. Material covers carbon and alloy steels
Our supply range
• Standard: ASTM A333/A333M, ASME SA333
• Material Grades: Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 7, Grade 8, Grade 9, Grade 10 and Grade 11
• Outer Diameters: NPS 1/2 inch to NPS 48 inch, 21.3mm to 1219mm
• Wall Thickness: SCH 10, SCH 20, SCH STD, SCH 40, SCH 80, SCH XS to SCH160, SCHXXS; 1.24mm up to 1 inch, 25.4mm
• Range of Length: 20ft to 40ft, 5.8m to 11.8m, 6m to 12m.
• Ends procession: Plain, beveled, threaded
• Coatings: 3LPE, FBE, Galvanized
If you need an ASTM A333 Grade 6 pipe PDF for submittals, we can prepare a project-style data sheet together with traceable documentation such as MTC, heat numbers, dimensional inspection, and impact test records aligned to your ITP.
ASTM A333 Gr 6 chemical composition & Mechnical property
A333/A333M-16 |
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| TABLE 1 Chemical Requirements | ||||||||||
| Element | Composition,% | |||||||||
| Grade 1 | Grade 3 | Grade 4 | Grade 6 | Grade 7 | Grade 8 | Grade 9 | Grade 10 | Grade 11 | ||
| Carbon,max | 0.30 | 0.19 | 0.12 | 0.30 | 0.19 | 0.13 | 0.20 | 0.20 | 0.10 | |
| Manganese, max | 0.40-1.06 0.025 |
0.31-0.64 | 0.50-1.05 | 0.29-1.06 | 0.90 max | 0.90 max | 0.40-1.06 | 1.15-1.50 | 0.60 max | |
| Phosphorus, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.035 | 0.025 | |
| Sulfur,max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.015 | 0.025 | |
| Silicon | … | 0.18-0.37 | 0.08-0.37 | 0.10 min | 0.13-0.32 | 0.13-0.32 | 0.10-0.35 | 0.35 max | ||
| Nickel | 3.18-3.82 | 0.47-0.98 | 0.40 max | 2.03-2.57 | 8.40-9.60 | 1.60-2.24 | 0.25 max | 35.0-37.0 | ||
| Chromium | … | … | 0.44-1.01 | 0.30 max | … | … | 0.15 max | 0.50 max | ||
| Copper | … | … | 0.40-0.75 | 0.40 max | … | … | 0.75-1.25 | 0.15 max | … | |
| Aluminum | .. | … | 0.04-0.30 | … | … | .. | … | 0.06 max | … | |
| Vanadium,max.. | … | … | 0.08 | … | … · | 0.12 | … | |||
| Columbium, max |
… | … | . | 0.02 | … | … | … | 0.05 | … | |
| Molybdenum,max | . | … | … | 0.12 | … | … | … · | 0.05 | 0.50 max | |
| Cobalt | … | … | … | 0.50 max | ||||||
| A.For each reduction of 0.01%carbon below 0.30%,an increase of 0.05 %manganese above 1.06%would be permited to a maximum of 1.35%manganese. | ||||||||||
| B. Where an ellipsis(...)appears in this table,there is no requirement and analysis for the element need not to be determined or reported. | ||||||||||
| C.By agreement between the manufacturer and the purchaser,the limit for columbium may be increased up to 0.05%on heat analysis and 0.06% on product analysis. | ||||||||||
| Property | ASTM A333 Grade 6 Requirement |
|---|---|
| Yield Strength (min) | 240 MPa (35 ksi) |
| Tensile Strength (min) | 415 MPa (60 ksi) |
Heat treatment requirements:
1. Normalize above 815°C.
2. Normalize above 815°C, then temper.
3. Hot formed between 845 and 945°C, then cooled in furnace above 845°C (for seamless tubes only).
4. Machined and then tempered as per above Point 3.
5. Hardened and then tempered above 815°C.
Pipe Tolerance
|
Outside Diameter, mm |
positive tolerance,mm |
negative tolerance,mm |
|
10.3-48.3 |
0.4 |
0.4 |
|
48.3＜D≤114.3 |
0.8 |
0.8 |
|
114.3＜D≤219.10 |
1.6 |
0.8 |
|
219.1＜D≤457.2 |
2.4 |
0.8 |
|
457.2＜D≤660 |
3.2 |
0.8 |
|
660＜D≤864 |
4.0 |
0.8 |
|
864＜D≤1219 |
4.8 |
0.8 |
Wall thickness tolerance of steel pipe:
Any point shall not be less than 12.5% of the nominal wall thickness. If the minimum wall thickness is ordered, no point shall be less than the required wall thickness.
Low-Temperature Impact Toughness (The Critical Feature)
This is the most important property of ASTM A333 GR.6.
Test Temperature: The Charpy V-Notch (CVN) impact test is conducted at -45°C (-50°F)
Requirement: The material must absorb a minimum average energy of 18 J (or 13 J according to some supplier data, but the standard aims for toughness to prevent failure) at this temperature -4-9. This ensures the pipe will not crack easily in cold environments.
Applications
Due to its low-temperature toughness, this grade is widely used in critical industries
1. Oil & Gas: For transmission lines in arctic regions or processing plants.
2.Petrochemical & Refineries: In cryogenic services and for handling liquefied gases (like ethylene, ammonia, urea).
3.Power Plants: For boiler systems and external piping in cold climates.
4.Chemical Processing: In equipment that operates at sub-zero temperatures
Tips
Foreign Trade Tips
Differentiate from A106: ASTM A106 GR.B is for high-temperature applications, ASTM A333 GR.6 is the dedicated choice for low-temperature environments (below -45°C) where impact resistance is required
Key Document Check: Always remind your supplier that the Mill Certificate must clearly show the Charpy Impact Test results at -45°C. Without this, the material cannot be certified as A333 GR.6.
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