Product Overview – ASTM A312 TP310H Welded Pipes
TP310H is the high carbon version of 310 stainless steel. The controlled carbon range enhances high-temperature tensile strength and stress rupture resistance.
This grade is specifically selected for pressure piping systems, superheaters, and refinery units where long-term service above 500°C–650°C is expected.
Unlike 310S, which focuses on weldability, 310H is selected for elevated temperature mechanical performance.
Welded TP310H pipes are manufactured through precision forming and longitudinal welding, followed by heat treatment and inspection as per ASTM A312 requirements.
Standard & International Identification - ASTM A312 TP310H Welded Pipes
Technical Specifications – TP310H Welded Pipes
| Manufacturing Method: | Welded / ERW |
| Nominal Bore Range: | 1/8″ NB to 36″ NB |
| Wall Thickness: | SCH 5S to SCH 160 |
| Standard Length: | 6m, 12m, Custom Length |
| Surface Finish: | Pickled, Annealed, Industrial Finish |
| Pipe Ends: | Plain End (PE), Beveled End (BE) |
| Inspection: | Hydrostatic, Weld Seam Testing, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
| Dimensional compliance: | ASME B36.19M. |
All specifications are in accordance of ASTM A312 / ASME SA312 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition of ASTM A312 TP310H Welded Pipes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10% |
| Manganese (Mn) | 2.00 % |
| Silicon (Si) | 1.50% |
| Phosphorus (P) | 0.045 % |
| Sulfur (S) | 0.030 % |
| Chromium (Cr) | 24.0 – 26.0% |
| Nickel (Ni) | 19.0 – 22.0% |
| Iron (Fe) | Balance |
Note: The higher carbon level distinguishes 310H from 310S.
Mechanical Properties of ASTM A312 TP310H Welded Pipes
| Property | Minimum Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | 40% |
310H offers enhanced creep resistance compared to 310S in long-term high heat conditions.
Elevated Temperature Service Capabilities- ASTM A312 TP310H Welded Pipes
SS 310H welded pipes deliver:
For superheater and high-pressure thermal units, 310H is often specified over 310S.
Industrial Usage Areas of ASTM A312 TP310H Welded Pipes
- 🔸Superheater assemblies
- 🔸Boiler pressure piping
- 🔸Petrochemical reactors
- 🔸Furnace structural components
- 🔸Power plant heat transfer systems
- 🔸High temperature refinery units
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