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ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes

ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes

  • ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes
  • ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes
  • ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes
  • ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes
ASTM A376 TP347H Seamless Pipes Supplier High-Temperature Austenitic Steel Pipes
Product Details:
Place of Origin: CHINA
Brand Name: YUHONG
Certification: ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number: ASTM A376 TP347H
Payment & Shipping Terms:
Minimum Order Quantity: 100KGS
Price: Negotiable
Packaging Details: Ply-wooden Case /Iron Case/ Bundle with plastic Cap/Woven Case
Delivery Time: Depends on quantity
Payment Terms: L/C,T/T
Supply Ability: 1000 tons per month
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Detailed Product Description
Material Grade: ASTM A376 TP347H / ASME SA376 TP347H Key Application: Superheater Tubes / Reformer Tubes / Boiler Systems
Processing Technology =: Cold-Drawn / Hot-Finished Seamless Equivalent Standards: UNS S34709, EN 1.4912, DIN X8CrNiNb16-13
NDT Testing: 100% UT (Ultrasonic) + Hydrostatic Test Certification Compliance: ASTM A376, ASME SA376, ISO 15510, NACE MR0175
Highlight:

ASTM A376 TP347H seamless pipes

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high-temperature austenitic steel pipes

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duplex stainless steel pipe supplier



1. TP347H Austenitic Stainless Steel Pipes Overview


ASTM A376 TP347H seamless pipes are high-temperature austenitic stainless steel tubes stabilized with niobium (Nb). Engineered for superior creep resistance and oxidation resistance up to 815°C (1,500°F), they withstand extreme thermal cycling and corrosive environments. Compliant with ASTM A376 standards, these pipes are solution-annealed for optimal microstructural stability, making them ideal for critical high-pressure applications.


2. TP347H Chemical Composition


The niobium-stabilized chemistry prevents chromium carbide precipitation, enhancing intergranular corrosion resistance.


Element Min (%) Max (%)
Carbon (C) 0.04 0.10
Chromium (Cr) 17.0 20.0
Nickel (Ni) 9.0 13.0
Niobium (Nb) 8×C min 1.10
Manganese (Mn) - 2.00
Silicon (Si) - 0.75
Phosphorus (P) - 0.045
Sulfur (S) - 0.030
Iron (Fe) Balance Balance


3. TP347H Equivalent Grades


Globally recognized cross-standard designations:


Standard Equivalent Grade
UNS S34709
EN 1.4912
DIN X8CrNiNb16-13
JIS SUS 347H TB
GB 0Cr18Ni11Nb


4. TP347H Mechanical Properties


Post-solution annealing properties per ASTM A376:


Property Value
Tensile Strength ≥515 MPa (75 ksi)
Yield Strength (0.2%) ≥205 MPa (30 ksi)
Elongation (%) ≥35% (50mm gauge length)
Hardness (Max) 192 HB / 90 HRB
Test Temperature Room Temperature (20°C)


5. TP347H Dimensional Tolerances


Manufactured to ASTM A376/A999 specifications:


Parameter Tolerance
Outer Diameter (OD) ±0.75% for OD ≤ 48.3mm; ±0.50% for OD > 48.3mm
Wall Thickness +20% / -12.5%
Length +6mm / -0mm (for lengths ≤6m)
Straightness 0.0015 × length (mm)


6. TP347H High-Temperature Applications


Designed for critical thermal and corrosive environments:


  • Power Generation: Superheaters, reheaters, and boiler tubes in coal-fired/thermal plants.


  • Petrochemical: Catalytic cracker units, furnace manifolds, and reformer tubes.


  • Aerospace: Exhaust systems and heat exchangers.


  • Nuclear: Steam generator tubing and pressurizer components.


  • Industrial Processing: High-temperature fluid transfer systems.



Why Choose Our TP347H Seamless Pipes?


  • Precision cold-drawn/hot-finished for uniform wall consistency.


  • 100% non-destructive testing (UT/ET) and hydrostatic certification.


  • Traceable mill test reports (MTRs) compliant with ASTM A376.


  • Custom sizes: OD 6mm–914mm, Wall Thickness 1.24–50mm.

Tag:

welded steel pipe,

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super duplex seamless pipe

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