Spiral seam carbon steel pipe ASTM A139 is a steel pipe produced in accordance with ASTM (American Society for Testing and Materials) standard A139. It is mainly used for welded structures, especially spiral seam submerged arc welded steel pipes. ASTM A139 steel pipe is primarily used in bridges, buildings, and other structural applications that require high strength and good welding properties.
ASTM A139 steel pipe is usually made of mild steel, which has good toughness and weldability. During the manufacturing process of steel pipes, steel plates are rolled into a spiral shape and welded by submerged arc welding to form a continuous spiral weld. This type of steel pipe is often used where it can withstand pressure and heavy loads because of its high mechanical strength and structural stability.
ASTM A139 steel pipe is usually made of mild steel, which has good toughness and weldability. During the manufacturing process of steel pipes, steel plates are rolled into a spiral shape and welded by submerged arc welding to form a continuous spiral weld. This type of steel pipe is often used where it can withstand pressure and heavy loads because of its high mechanical strength and structural stability.
Mechanical Property
| Grade A | Grade B | Grade C | Grade D | Grade E | |
| Yield strength, min, Mpa(KSI) | 330(48) | 415(60) | 415(60) | 415(60) | 445(66) |
| Tensile strength, min, Mpa(KSI) | 205(30) | 240(35) | 290(42) | 315(46) | 360(52) |
Chemical Composition
|
Element |
Composition, Max, % |
||||
|
Grade A |
Grade B |
Grade C |
Grade D |
Grade E |
|
|
Carbon |
0.25 |
0.26 |
0.28 |
0.30 |
0.30 |
|
Manganese |
1.00 |
1.00 |
1.20 |
1.30 |
1.40 |
|
Phosphorus |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
|
Sulfur |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
