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347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
Specifications
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
Description

SMLS Stainless Steel Pipe Tube Alloy TP347H ASTM A312 Alloy OD89MM 108MM 168MM 219MM

Products Specification

Products Name 347 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

347H stainless steel is a high-performance austenitic stainless steel alloy, renowned for its exceptional high-temperature strength and resistance to intergranular corrosion. Its unique composition, particularly the addition of niobium (Nb), stabilizes the material by preventing carbide precipitation at grain boundaries, making it ideal for demanding industrial environments involving elevated temperatures and corrosive conditions.

Chemical Composition

The precise alloying elements in 347H stainless steel are as follows:
Element Content Range (%) Purpose
Chromium (Cr) 17.0 – 19.0 Enhances corrosion resistance and oxidation resistance at high temperatures.
Nickel (Ni) 9.0 – 13.0 Stabilizes the austenitic structure, improving ductility and toughness.
Niobium (Nb) ≥ 5 × C (min) Prevents carbide precipitation (sensitization), enhancing intergranular corrosion resistance.
Carbon (C) 0.04 – 0.10 The "H" designation indicates higher carbon content, boosting high-temperature strength.
Manganese (Mn) ≤ 2.0 Aids in deoxidation and improves hot workability.
Silicon (Si) ≤ 1.0 Enhances oxidation resistance and acts as a deoxidizer.
Phosphorus (P) ≤ 0.045 Controlled to minimize brittleness.
Sulfur (S) ≤ 0.030 Reduces hot cracking during welding when kept at low levels.

Mechanical Properties

347H exhibits robust mechanical performance, especially under high-temperature conditions:
Property Minimum Value Testing Condition
Tensile Strength 515 MPa (75,000 psi) Room temperature
Yield Strength (0.2% offset) 205 MPa (30,000 psi) Room temperature
Elongation (in 50 mm) 40% After annealing
Hardness (HRB) 95 (max) Room temperature

Key Characteristics & Advantages

  • High-Temperature Stability: Maintains strength and structure at temperatures up to 816°C (1500°F), resisting creep and oxidation.
  • Corrosion Resistance: Niobium stabilization prevents sensitization (carbide formation at grain boundaries), even after welding, reducing intergranular corrosion risk.
  • Weldability: Suitable for most welding processes (e.g., TIG, MIG) without significant loss of mechanical properties.
  • Formability: Can be cold-worked (e.g., bending, rolling) and hot-formed (e.g., forging) with proper process control.

Typical Applications

347H stainless steel is widely used in industries requiring both heat resistance and corrosion resistance:
Industry Applications
Power Generation Boiler tubes, superheaters, reheaters, and high-pressure steam pipelines.
Petrochemical Refinery equipment, catalytic crackers, and high-temperature process piping.
Chemical Processing Reactors, heat exchangers, and pipelines handling corrosive fluids.
Aerospace Exhaust systems and high-temperature structural components.

347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400

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347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400

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Product Detail
Brand Name :
DELTA
Model Number :
347
Certification :
ISO
Place of Origin :
China
MOQ :
500 kgs
Price :
5-8 USD/Kg
Contact Supplier
video
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400
347H Stainless Steel Seamless Pipe ASTM A312 DN10-DN400

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
3 Years
jiangsu, wuxi
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter
Main Products :
Stainless Steel Strip, Stainless Steel Sheet, Stainless Steel Plate
Total Annual :
>1000000
Employee Number :
>100
Certification Level :
Verified Supplier
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