ASTM A 106 Black Carbon Seamless Steel Pipe for High-Temperature Service
Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations, and for welding. When the steel is to be welded, it is presupposed that a welding procedure suitable to the grade of steel and intended use or service will be utilized.Manufacturing Process of ASTM A106 Seamless Steel Pipe:
ASTM A106 seamless steel pipe are produced either by cold-drawn or hot rolled, as specified.Chemical Composition of ASTM A106 Seamless Steel Pipe
Grade and Chemical Composition (％)| Grade | C≤ | Mn | P≤ | S≤ | Si≥ | Cr≤ | Cu≤ | Mo≤ | Ni≤ | V≤ |
| A | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| B | 0.30 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| C | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
Dimension tolerance of ASTM A106 Seamless Steel Pipe
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Dimension Tolerances：
Pipe Type
Pipe Sizes Tolerances Cold Drawn
OD ≤48.3mm ±0.40mm ≥60.3mm ±1％mm WT ±12.5％
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Appearance for ASTM A106 Black Seamless Steel Pipe
A sufficient number of visual surface imperfections to provide seasonable assurance is necessary. The defect shall be removed or cut off within the limits of requirements on length . The finished pipe shall be reasonably straight.Delivery Condition
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- In principle, it should be in manufacturing condition, or a cold finish condition, or an annealing condition. Other heat treatments are available upon request
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Marking for ASTM A106 Black Seamless Steel Pipe
- Manufacturer’s name or mark
- Specification number(year-date or required)
- Size( OD, W.T, length)
- Grade( A or B)
- Type of pipe( F, E, or S)
- Test pressure( seamless steel pipe only)
- Heat Number
- Any additional information specified in the purchase order.
Packing for ASTM A106 Black Seamless Steel Pipe:
- Bare pipe or Black / Varnish coating ( customized);
- 6”and below in bundles with two cotton slings ;
- Both ends with end protectors;
- Plain end , bevel end(2”and above with bevel ends, degree: 30~35°) ,threaded and coupling;
- Marking.
| Grade | Rm Mpa Tensile Strength | Mpa Yield Point | A％ Elongation | Delivery Condition |
| A | ≥330 | ≥205 | 20 | Annealed |
| B | ≥415 | ≥240 | 20 | Annealed |
| C | ≥485 | ≥275 | 20 | Annealed |
Mechanical Properties of ASTM A106 Seamless Steel Pipe