ASTM A106 Standard Specification
The ASTM A106 standard is widely recognized for specifying seamless Carbon Steel pipes designed for use in high-temperature environments. These pipes are commonly used in industries such as refineries, power plants, and boiler systems where the transport of gases or liquids under high pressure and temperature is required. The material is suitable for various fabrication processes including bending, flanging, and welding, making it a versatile choice for industrial piping applications.
Chemical Composition of ASTM A106
| Steel Grade |
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 |
Mechanical Properties of ASTM A106
| Grade |
Tensile Test (MPa or N/mm²) |
Remarks (Similar to JIS) |
| Min. Yield Point |
Tensile Strength |
| Gr A |
205 |
330 Min |
(STPG370) |
| Gr B |
240 |
415 Min |
(STPG410) |
| Gr C |
275 |
485 Min |
(STPG480) |
Dimensional Tolerances for ASTM A106
| Pipe Type |
Pipe Sizes |
Tolerances |
| Cold Drawn |
OD |
≤48.3mm |
±0.40mm |
| ≥60.3mm |
±1% mm |
| WT |
±12.5% |
Number of Tests Required
|
NPS |
On One Length from Each Lot of |
| Tensile |
5 and smaller |
400 or less |
| 6 and larger |
200 or less |
| Bending |
2 and smaller |
400 or less |
| Flattening |
2 through 5 |
400 or less |
| 6 and over |
200 or less |
ASTM A106 pipes are essential in high-temperature and high-pressure systems due to their excellent mechanical properties and reliability. They are manufactured with strict quality control to ensure compliance with industry standards, providing long-term performance and safety in critical applications. Whether you're working on a power plant project or an oil refinery system, ASTM A106 is a trusted choice for durable and efficient piping solutions.
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