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ASTM A106 Standard Specification
The ASTM A106 standard outlines the requirements for seamless Carbon Steel pipes designed for high-temperature applications. These pipes are commonly used in industries such as refineries and boiler plants, where they must withstand high temperatures and pressures while transporting gases or liquids. Pipes manufactured according to this specification are expected to be suitable for various forming processes, including bending, flanging, and welding.
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 |
ASTM A106 Mechanical Properties
| Grade | Tensile Test MPa or N/mm2 | Remarks (Similar to JIS) | |
|---|---|---|---|
| Minimum Yield Point | Tensile Strength | ||
| Gr A | 205 | 330Min | Â (STPG370) |
| Gr BÂ | 240 | 415Min | Â (STPG410) |
| Gr C | 275 | 485Min | Â (STPG480) |
Â
Dimensional Tolerances for ASTM A106 Pipes
| Pipe Type | Pipe Sizes | Tolerances | |
|---|---|---|---|
| Cold Drawn | OD | ≤48.3mm | ±0.40mm |
| ≥60.3mm | ±1%mm | ||
| WT | ±12.5% | ||
Number of Tests Required
| Test Type | NPS | Quantity per Lot |
|---|---|---|
| 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 |
These specifications ensure that ASTM A106 pipes meet rigorous standards, making them ideal for critical industrial applications. Their robust mechanical properties and precise dimensional tolerances make them reliable components in environments where performance under stress is paramount. Additionally, the testing requirements guarantee consistent quality across each batch, providing assurance to users that these pipes will perform effectively in demanding conditions.
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