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Products Description
ASTM A312 TP347H Stainless Steel Pipe
Advantages of ASTM A312 TP347H Stainless Steel Pipe
- Material Advantages: The stabilizing effect of niobium in TP347H prevents carbide precipitation, thereby reducing intergranular corrosion in steam circuits, making it suitable for boilers, superheaters, and reheaters.
- Welding Advantages: TP347H's resistance to intergranular corrosion ensures strong and reliable process piping welds.
- High Creep Strength Advantage: TP347H's high carbon content enhances the pipe's deformation resistance at high temperatures through solid solution strengthening and carbide precipitation.
applications of ASTM A312 TP347H Stainless Steel Pipe
- Petrochemical and Refining Industries: Furnace tubes, reformer piping, and catalytic cracking units.
- Chemical Processing: Reactors, heat exchangers, and piping systems for handling highly oxidizing chemicals.
- Aerospace and Gas Turbines: Turbine casings and exhaust systems, high-temperature fuel and exhaust piping, etc.
- Environmental Protection: Incinerators, flue gas cleaning systems, and waste heat recovery boilers.
- Industrial Heating Equipment: Heat treatment furnace components, radiant tubes, and high-temperature conveyors.
Chemical Composition
| Element | C | Mn | Si | P | S | Cr | Ni | Nb + Ta |
| TP347H (%) | 0.04 – 0.10 | ≤ 2.00 | ≤ 0.75 | ≤ 0.045 | ≤ 0.030 | 17.0 – 19.0 | 9.0 – 13.0 | ≥ 10 × C (typically 0.8 – 1.20%) |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness |
| Value | ≥ 515 MPa | ≥ 205 MPa | ≥ 35% | ≤ 90 (HRB) |
Possible Alternative Grades
- 304H – For moderate high-temperature service.
- 316H – Better chloride resistance, but lower creep strength than 347H.
- 321H – Titanium-stabilized, also good for high temperatures.
- Incoloy 800H/HT – For very high temperature strength beyond stainless steels.
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We updated and perfected the product structure of ASTM A312 Grade TP304L Exhaust Pipes (TP304 TP304L TP316 TP316L TP347 TP347H TP321 TP321H TP310 TP310S) in order to comply with market changes and ever-increasing requirements of customers. We always adhere to the spirit of pursuing excellence, take patriotism and love for the people as the soul of running a business, take the supremacy of integrity as the foundation of the business, and take reform and innovation as the road to force. We have a young and passionate team.
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