ASTM A106 Standard Specification
ASTM A106 pipe is the standard specification for seamless carbon steel pipes for high temperature applications. The application range is the transport of gases or liquids in refineries and boiler plants where high temperatures and pressures are encountered. Pipe produced in accordance with ASTM A106 shall be suitable for bending, flanging, welding, and other forming operations.
ASTM A106 Chemical composition:
| 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 Property:
| Grade |
Tenssile Test MPa or N/mm2 |
Remarks (Similar to JIS) |
| MIn. Yield Point |
Tensile Strength |
| Gr A |
205 |
330Min |
(STPG370) |
| Gr B |
240 |
415Min |
(STPG410) |
| Gr C |
275 |
485Min |
(STPG480) |
ASTM A106 Dimension Tolerances:
| 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 |
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