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TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN

TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN

TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN
TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN
Categories Stainless Steel Pipe
Brand Name: DELTA
Model Number: 347
Certification: ISO
Place of Origin: China
MOQ: 500 kgs
Price: 5-8 USD/Kg
Payment Terms: L/C,T/T,Western Union
Supply Ability: 3 Ton per week
Delivery Time: 5 - 12 days based on the quantity
Packaging Details: standard packing for export
Products: Stainless Steel Seamless Pipe
Grade: 347
Diameter: DN10 - DN400
Length: 6m or custom cutting any length as request
Standard: ASTM EN
Service: Cutting
Loading Port: Shanghai Port
Thickness: 4.0 - 50.0mm
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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
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TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN

Alloy 347H Stainless Steel Tubing / ASTM A312 Austenitic Stainless Pipes TP347H for Industrial


Products Specification


Products Name347 Stainless Steel Seamless Pipe

Grade:		304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 S32760 904L 254SMO and equal grade in GB JIS EN DIN Standard
Standards:ASTM A213M-94b ASTM A249M-94a ASTM A269-94a
ASTM A312M-94b,ect.
DIN 17456-85 DIN 17458-85 DIN 17459-92.ect
JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect.
GB13296-1991 GB14975-2002 GB14976-2002,ect.
Size:ND5 - DN400
Length:6m length or cutting any length as request
Applications:fluid and gas transport, structure , boiler, heat exchanger, super heater

TP347H Stainless Steel Pipe: High-Temperature Performance for Critical Industrial Applications

TP347H stainless steel pipe is a premium-grade austenitic stainless steel designed for extreme environments requiring high-temperature strength and corrosion resistance. The "TP" designation indicates its use as Tube/Pipe, while the "H" suffix denotes higher carbon content (0.04–0.10%) for enhanced creep resistance at elevated temperatures. Stabilized with niobium (Nb), it prevents carbide precipitation at grain boundaries, making it ideal for welded components in corrosive and high-heat settings

Chemical Composition

ElementContent Range (%)Role in Performance
Chromium (Cr)17.0–19.0Forms a protective oxide layer, enhancing resistance to oxidation and corrosion.
Nickel (Ni)9.0–13.0Stabilizes the austenitic structure, improving ductility and toughness.
Niobium (Nb)≥5×Carbon (C)Prevents sensitization (carbide formation) during welding or high-temperature exposure.
Carbon (C)0.04–0.10Boosts high-temperature strength and creep resistance.
Manganese (Mn)≤2.0Aids in deoxidation and improves hot workability.
Silicon (Si)≤1.0Enhances oxidation resistance and acts as a deoxidizer.
Phosphorus (P)≤0.045Controlled to minimize brittleness.
Sulfur (S)≤0.030Reduces hot cracking during welding when kept low.

Mechanical Properties

PropertyMinimum ValueTesting Condition
Tensile Strength515 MPa (75,000 psi)Room temperature
Yield Strength (0.2% offset)205 MPa (30,000 psi)Room temperature
Elongation (in 50 mm)35–40%After annealing
Hardness (HRB)95 (max)Room temperature

Standards & Specifications

TP347H pipes comply with rigorous international and industry standards:

StandardApplication Scope
ASTM A213/ASME SA213Boiler, superheater, and heat exchanger tubes for high-pressure steam systems
ASTM A312/ASME SA312Seamless and welded pipes for corrosive environments
GB/T 14976Chinese standard for fluid transport and boiler applications
EN 10216-2European standard for pressure tubes in high-temperature services.

Typical Applications

TP347H pipes excel in industries demanding reliability under extreme conditions:

IndustryApplications
Power GenerationBoiler tubes, superheaters, reheaters, and high-pressure steam pipelines in coal-fired and gas-fired power plants
PetrochemicalRefinery equipment, catalytic crackers, and process piping handling corrosive fluids like hydrogen sulfide
Chemical ProcessingReactors, heat exchangers, and pipelines for acids, alkalis, and organic solvents.
AerospaceExhaust systems and structural components in jet engines and aerospace propulsion systems

Key Advantages

  1. Exceptional High-Temperature Stability:
    Maintains structural integrity up to 816°C (1500°F) and resists creep deformation in prolonged high-heat applications
  2. Corrosion Resistance:
    Niobium stabilization prevents intergranular corrosion, even after welding, making it suitable for aggressive chemical environments
  3. Superior Weldability:
    Compatible with TIG, MIG, and plasma welding methods without significant loss of mechanical properties
  4. Formability:
    Readily cold-worked (e.g., bending, rolling) and hot-formed (e.g., forging) with proper process control
  5. Cost-Effective Performance:
    Outperforms 321H in extreme temperatures (above 537°C) while offering comparable corrosion resistance

Packaging & Handling

TP347H pipes are packaged to ensure damage-free transport:

  • Inner Protection: Ends capped with plastic to prevent debris ingress.
  • Weather Resistance: Wrapped in plastic film or woven cloth to guard against moisture and abrasion
  • Secure Bundling: Bundled with steel straps or polypropylene bands for stability during shipping.
  • Custom Options: Wooden crates or pallets available for sensitive or large-diameter pipes

Conclusion

TP347H stainless steel pipe combines niobium stabilization and high-carbon content to deliver unmatched performance in high-temperature, corrosive environments. Its compliance with global standards, robust mechanical properties, and versatility make it the material of choice for critical infrastructure in power, petrochemical, and aerospace industries. Whether in boiler tubes for a Thai power plant or refinery reactors, TP347H ensures longevity and reliability where failure is not an option.
Product Tags:

TP347H stainless steel pipe

  

ASTM stainless steel seamless pipe

  

DN10-DN400 stainless steel pipe

  
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TP347H Stainless Steel Seamless Pipe DN10-DN400 ASTM EN

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