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| Availability: | |
|---|---|
| Quantity: | |
Grade | C | Cr | Ni | Mn | P | S | Si | Other |
347 | ≤0.08 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 1>Nb≥10*C% |
347H | 0.04-0.10 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 1>Nb≥8*C% |
Grade | Yield strength ksi(MPa) | Tensile Strength ksi(MPa) | Elogation % | Hardness Brinell/Vickers | Hardness Rockwell |
347 | ≥30(205) | ≥75(515) | ≥35 | ≤192 HBW/200HV | 90HRB |
347H | ≥30(205) | ≥75(515) | ≥35 | ≤192 HBW/200HV | 90HRB |
Boiler tubes and casings
Oil and gas refinery piping
Radiant superheaters
High-pressure steam pipes
Heat exchanger tubes
Cabin heaters
Heavy wall-welded equipment
Aircraft exhaust stacks and collector rings
Chemical production equipment
End of Pipe and Tube
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Marking
Supplier / Manufacturer Name or Custom Logo - on request
Specification
Material Grade
Nominal Size
Schedule or Wall Thickness
Method of Manufacturing (Seamless or Welded)
Heat Number
Marked Pipe Sample: XTD ASTM A312 TP347H SEAMLESS 42.2x 3.56*6000MM HEAT NO. 2023121205A15
Packing
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Delivery Condition
Pickled&Annealed, Polished, Bright Annealed.
All tubes shall be supplied as per applicable ASTM B163 /B426
Mill test certificates will be issued
We can provide 3.2 Certification according to the needs of you
Standard
ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A213: Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
Type 347H is a high carbon austenitic chromium stainless steel. Found in applications that demand high temperature resistance, other major design features include:
1. Similar resistance and corrosion protection as 304
2. Used for heavy welded equipment when annealing is not possible.
3. Good oxidation resistance, on par with most other austenitic stainless steels
4. Higher carbon allows for better high temperature creep properties.
The “H” in 347H stands for “high carbon” content. This variety of stainless steel has higher amounts of carbon than standard 347 stainless steel, with increased tensile strength and creep resistance at elevated temperatures. Due to its higher carbon content, this type of stainless steel provides better stress rupture properties than the standard version. It also offers excellent resistance to oxidation in intermittent service up to 1600F and continuous service up to 1700 degrees F.
Both steels are non-magnetic and can be used in applications where magnetism is a concern.
347h is more expensive than 347 due to its higher carbon content.
Applications for both steels include aerospace, chemical processing, oil and gas, and power generation.
