ASTM A53 is Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless. ASTM A106 is Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service. API 5L is Specification for Line Pipe.
A 53 is a general steel pipe spec which covers galvanized pipe and black pipe. It is available in Type S (seamless), Type E (ERW, electric resistance welded longitudinal seam), and Type F (furnace welded).
A106 Gr. B is intended for high temperature service (up to 750 Deg F). It just applies to seamless steel pipe with killed steel. Pipe of NPS 1 1/2" and under may be either hot finished or cold drawn. Unless specified, pipe on and over NPS 2″ shall be hot finished, while A53 and API 5L are not.
| Standard | Grade | Chemical Composition % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Cu | Ni | Mo | V | ||
| ASTM A106 | B | ≤0.30 | 0.29-1.06 | ≤0.035 | ≤0.035 | >0.10 | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 |
| ASTM A53 | B | ≤0.30 | ≤1.20 | ≤0.05 | ≤0.045 | – | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 |
| API 5L | B(PSL-1) | ≤0.28 | ≤1.20 | ≤0.030 | ≤0.030 | – | – | – | – | – | – |
| DIN 1629 | St 37.0 | ≤0.17 | – | ≤0.040 | ≤0.040 | – | – | – | – | – | – |
| DIN 2448 | St 44.0 | ≤0.21 | – | ≤0.040 | ≤0.040 | – | – | – | – | – | – |
| EN10210 | S235JRH | ≤0.17 | ≤1.40 | ≤0.040 | ≤0.040 | – | – | – | – | – | – |
| GB/T8163 | 10# | 0.07-0.13 | 0.35-0.65 | ≤0.035 | ≤0.035 | 0.07-0.37 | ≤0.15 | ≤0.25 | ≤0.30 | – | – |
| GB/T8162 | 20# | 0.17-0.23 | 0.35-0.65 | ≤0.035 | ≤0.035 | 0.17-0.37 | ≤0.25 | ≤0.25 | ≤0.30 | – | – |
| Standard | Grade | Tensile Strength (MPa) |
Yield Strength (MPa) |
Trans.Elongation (%) |
Impact Test (J) |
|---|---|---|---|---|---|
| ASTM A106 | B | >415 | ≥240 | ≥16.5 | – |
| ASTM A53 | B | >415 | ≥240 | – | – |
| API 5L | B(PSL-1) | >414 | ≥241 | As clause a | – |
| DIN 1629 | St 37.0 | 350-480 | ≥235 | ≥23 | – |
| DIN 2448 | St 44.0 | 420-550 | ≥275 | ≥19 | – |
| EN10210 | S235JRH | 360-510 | ≥235 | ≥26 | 27 (+20°C) |
| GB/T 8163 | 10# | 335-475 | ≥205 | ≥24 | – |
| GB/T 8162 | 20# | 410-550 | ≥245 | ≥20 | – |
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