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Astm A106 Grade B Seamless Steel Pipe St37 Seamless Steel Tube
ASTM A106/ASME SA106 is the standard specification for seamless carbon steel pipe applied for high temperature services. It includes three grades A, B and C, and common use grade is A106 Grade B. It used in different industries not only for pipeline systems like oil and gas, water, mineral slurry transmission, but also for boiler, construction, structural purposes.
| Grade A | Grade B | Grade C | |
| Carbon max. % | 0.25 | 0.30 | 0.35 |
| *Manganese % | 0.27 to 0.93 | *0.29 to 1.06 | 0.29 to 1.06 |
| Phosphorous, max. % | 0.035 | 0.035 | 0.035 |
| Sulfur, max. % | 0.035 | 0.035 | 0.035 |
| Silicon, min.% | 0.10 | 0.10 | 0.10 |
| Chrome, max. % | 0.40 | 0.40 | 0.40 |
| Copper, max. % | 0.40 | 0.40 | 0.40 |
| Molybdenum, max. % | 0.15 | 0.15 | 0.15 |
| Nickel, max. % | 0.40 | 0.40 | 0.40 |
| Vanadium, max.% | 0.08 | 0.08 | 0.08 |
The materials used for ASTM A106 standard specification shall be applicable for bending, flanging, or the similar forming processes. In case the steel material is to be welded, the welding process supposed to be suitable for this grade of ASTM A106, and applicable for the high temperature working environment.
Where there is a superior or a higher grade for the ASTM A106 steel pipe is required, the standard has a optional specification for the supplementary requirements, for the pipes that used this standard. More over, these supplementary specification asked for the additional test, when the order is to be placed.
