ASME SA213 TP347H Stainless Steel Seamless Tube for Superheater
ASTM A213 TP347H is a seamless stainless steel tube designed for high-temperature applications, particularly suitable for superheaters and heat exchangers.
GNEE supplies ASTM A213 ASME SA-213 TP347H seamless steel tubes made of niobium-chromium-nickel austenitic stainless steel. Due to the presence of stable niobium, TP347H steel tubes exhibit excellent resistance to intergranular corrosion, high durability and strength, oxidation resistance, and superior bending and welding properties. Its overall performance surpasses that of ASTM A213 ASME SA-213 TP304H. ASTM A213 ASME SA-213 TP347H seamless steel tubes are suitable for high-temperature and high-pressure environments; the maximum operating temperature for pressure-bearing components is 650°C, and the maximum operating temperature for oxidation-resistant components is 850°C.
Product Name：ASTM A213 ASME SA-213 TP347H Stainless Steel Tubes
FOB Price: US $4000-5000 / Ton | 1 Ton/Tons (Min. Order)
Specifications: 57mm*8mm; 60mm*9mm; 45mm*11mm, 51mm*12mm etc.
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package：Standard export package,suit for all kinds of transport, or as required
Email: sales@gneestainless.com
Chemistry Composition of ASTM A213 ASME SA-213 TP347H
| GRA. | UNS. | ASME SA213 CHEMICAL COMPOSITION % | ||||||
|---|---|---|---|---|---|---|---|---|
| C | MN | P |
S |
SI | CR | NI | ||
| TP347H | S34709 | 0.04-0.10 | 2.00 | 0.045 | 0.030% max | 1.0 | 17.00-19.00 | 9.0-13.0 |
Mechanical Properties of ASTM A213 ASME SA-213 TP347H
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 515 min | 205 min | 35 min | 192 max |
ASTM-A213 TP347H Seamless Boiler Superheater and Heat Exchanger Tubes
| Allowable Outside Diameter Variation in mm | Allowable Wall Thickness Variation | Exact Length Tolerance in mm | Testing | ||||
|---|---|---|---|---|---|---|---|
| Nominal Diameter | Over | Under | %Over | %Under | Over | Under | |
| Under 25.4 | .1016 | .1016 | +20 | -0 | 3.175 | 0 | Flattening Test |
| 25.4-38.1 incl | .1524 | .1524 | +22 | -0 | 3.175 | 0 | Tension Test |
| 38.1-50.8 excl | .2032 | .2032 | +22 | -0 | 3.176 | 0 | Flare Test |
| 50.8-63.5 excl | .254 | .254 | +2 | -0 | 4.46 | 0 | Hardness Test |
| 63.5-76.2 excl | .347H8 | .347H8 | +22 | -0 | 4.76 | 0 | 100% Hydrostatic test |
| 76.2-101.6 incl | .381 | .381 | +22 | -0 | 4.76 | 0 | Refer to ASTM A-450 |
Requirements for heat treatment and grain size of sa-213 TP347H seamless steel tube
| Grade | Heat treatment | Solution treatment temperature,℃ | Cooling medium | ASTM grain size class number |
| SA-347H | solution treatment. | Cold working(1100℃) Hot working(1050℃) |
Water cooling or rapid cooling | 7 |
ASME SA213 TP347H Stainless Steel Seamless Tube Applications
Due to its exceptional oxidation resistance and high-temperature strength, TP347H is extensively used in:
Power Generation: Superheater and reheater tubes for ultra-supercritical boilers.
Petrochemical: High-temperature heat exchanger tubes and refinery piping systems.
Chemical Processing: Equipment handling organic acids and hot oxidizing environments.
When you inquire about ASTM A213 TP347H seamless tubes from a supplier, please be sure to provide/ask for the following information: Outer diameter (OD), wall thickness, length (single or double random)
Grade: TP347H / 1.4550 (confirm if it meets your specifications)
Surface treatment: bright annealing, pickling annealing, cold drawing, etc.
Certifications: factory test certificate (e.g., EN10204/3.1), third-party inspection reports available if required
Surface condition and end treatment (flat end, beveled end)
Quantity (tons or pieces) and delivery terms (FOB, CIF, etc.)
Packaging requirements (wooden crates, strapping, etc.)
Delivery time and port of shipment.
Inspection & Test:
Chemistry composition,
Tensile test,
Hardeness test,
Flattening test,
Flaring test,
NDT,
Surface inspection and dimension check.
Markings
Markings will adhere to prescribed specifications in A999/A999M. They shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydro testing is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). For Grades TP347 and TP347H Stainless Tubes, the marking shall also include the heat number and heat-treatment lot identification.
Note:
Mill test certificates will be issued according to EN10204-3.1 or 3.2
All tubes shall be supplied as per applicable ASME SA213/213M Specification.
FAQ
What is the difference between TP347 and TP347H?
The primary difference lies in the carbon content. TP347H has a controlled carbon range of 0.04% to 0.10%, whereas standard TP347 usually has a maximum limit of 0.08%. The higher carbon in TP347H specifically enhances creep strength for high-temperature service above 538°C.
Why is Niobium added to TP347H?
Niobium (Nb), also known as Columbium, is a strong carbide-forming element. It combines with carbon to prevent the formation of chromium carbides at grain boundaries, thereby protecting the steel from intergranular corrosion (sensitization).
Is ASME SA213 TP347H the same as ASTM A213 TP347H?
Yes, for most practical purposes, they are identical. ASTM A213 is the standard specification published by ASTM International, while ASME SA-213 is the version adopted by the ASME Boiler and Pressure Vessel Code (BPVC) for use in pressure applications.
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