ASTM A106 Standard Specification
The ASTM A106 standard outlines the requirements for seamless Carbon Steel pipes designed for use in high-temperature environments. These pipes are commonly used in refineries, power plants, and boiler systems where they are exposed to elevated temperatures and pressure conditions. The material is suitable for various fabrication processes such as bending, flanging, and welding, making it a versatile choice for industrial 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 |
≤48.3 mm |
±0.40 mm |
| ≥60.3 mm |
±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 widely used in critical infrastructure projects due to their strength, durability, and ability to withstand harsh environmental conditions. Whether you're working on a power generation system or an oil and gas pipeline, selecting the right grade based on temperature and pressure requirements is essential. Always consult with a qualified metallurgist or engineer to ensure that the chosen material meets all project specifications and safety standards.
Carbon Steel
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