ASTM A106 seamless steel pipe is carbon steel pipe for boilers, heat exchangers and high-temperature service. ASTM A106 includes 3 steel grades: A106 grade A, A106 grade B and A106 grade C. The ASTM A106 seamless steel pipes are suitable for welding, bending, flanging, and similar forming operations. Mechanical testing of the specimens shall include tensile, bending, flattening, hydrostatic and nondestructive electric tests. Among the 3 ASTM A106 steel grades, ASTM A106 grade B is one most commonly used steel grade.
ASTM A106 seamless steel pipe chemical Composition:
| ASTM A106 | C, max.% | Mn % | P, max | S, max | Si, min | Cr, max | Cu, max | Mo, max | Ni, max | V, max |
| Grade A | 0.25 | 0.27 - 0.93 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| Grade B | 0.30 | 0.29 - 1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
| Grade C | 0.35 | 0.29 - 1.06 | 0.035 | 0.035 | 0.10 | 0.40 | 0.40 | 0.15 | 0.40 | 0.08 |
ASTM A106 seamless steel pipe mechanical property:
| ASTM A106 | Tenssile Test MPa or N/mm2 | Remarks (Similar to JIS) | |
| MIn. Yield Point | Tensile Strength | ||
| Grade A | 205 | 330Min | (STPG370) |
| Grade B | 240 | 415Min | (STPG410) |
| Grade C | 275 | 485Min | (STPG480) |
ASTM A106 equivalent steel grades:
| Specification | Mechanical Properties | Grade A | Grade B | Grade C |
| ASTM A53 | Tenside strength, min, psi (MPa) | 48000(330) | 60000(415) | |
| Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | ||
| ASTM A106 | Tenside strength, min, psi (MPa) | 48000(330) | 60000(415) | 70000(485) |
| Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | 40000(275) |
ASTM A106 seamless steel pipe (also covered in ASME specifications as ASME SA 106) is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels.
