Shipbuilding
ASTM A106 standard specification for seamless steel pipe for high-remperature service.
ASTM A106 (also known as ASME SA106 pipes) belongs to the American standard, which contains steel grade: Gr.A; Gr.B; Gr.C. 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.
Sizes
1” – 26” dependent on OD vs Wall Ratio
ASTM A106 Grade B pipe is equivalent to ASTM A53 Grade B and API 5L B on chemical position and mechanical properties, in general use carbon steel and yiled strength minimum 240 MPa, tensile strength 415 Mpa.
Mechanical Properties:
|
Steel Grade |
Tensile Strength(Mpa) |
Yield Strength(Mpa) |
Elongation(%) |
Delivery Condition |
| A |
≥330 |
≥205 |
20 |
Annealed |
| B |
≥415 |
≥240 |
20 |
Annealed |
| C |
≥485 |
≥275 |
20 |
Annealed |
Chemical Composition:
| Element | Grade A | Grade B | Grade C |
| Carbon max. % | 0.25 | 0.30 | 0.35 |
| Manganese % | 0.27 – 0.93 | 0.29 – 1.06 | 0.29 – 1.06 |
| Phosphorus max % | 0.035 | 0.035 | 0.035 |
| Sulfur max % | 0.035 | 0.035 | 0.035 |
| Silicon, min % | 0.10 | 0.10 | 0.10 |
Process:
ASTM A106 seamless steel pipe includes two processes, cold drawn and hot rolled. In addition to the different production processes, the two are different in precision, surface quality, minimum size, mechanical properties, and organizational structure. It is widely used in various industries such as petroleum, chemical industry, boiler, power station, shipbuilding, machinery manufacturing, automobile, aviation, aerospace, energy, geology, construction and military industry.
Heat treatment:
Hot-finished pipe need not be heat treated.When hot finished pipe is heat treated, it shall be heat treated at a temperature of 1200°F(650℃) or higher.
Cold drawn pipe shall be heat treated after the final cold draw pass at a temperature of 1200°F(650℃) or higher.
