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Quality - BS EN 9120:2005, / ISO 9001:2008

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Alloy 347 is a chromium nickel stainless steel which has been modified by the addition of columbium and tantalum.  The main advantage of this is an excellent resistance to intergranular corrosion which is common to other austenitic stainless steels following exposure to temperatures of 800° to 1500°F.  Type 347 has about the same general corrosion resistance as Type 302

Type 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors.  Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 800° to 1500°F

Type 347 Tube is available the following size ranges.

Outside Diameter  - 0.25mm (0.010") up to 16.00mm (0.625")

Wall                          - 0.05mm (0.002") up to 1.00mm (0.040")

Straight Lengths     - 1.00mm (0.040") up to 5000.00mm (197")

Coils Lengths          - 5 Metres to 15 Metres

Standard Tolerance- OD &ID +/-0.03mm (0.0012")

                                     Wall +/- 10%

Tight Tolerance       - OD&ID +/- 0.015mm (0.0006")

                                    Wall +/-3%

Some thin wall tubes up to 25.40 mm (1.000") can be supplied.

Type 347 and 347H is also available in Sheet, Plates and Bars (Flat, Hex, Round, Square).  347 Foil (Shim) is available in various thicknesses.  View stock list for further information.  Foil Stock List, Sheet/Plate Stock List.

Type 347 Tube Stainless Steel is covered by the following specifications:

 UNS S30347

Similar Specifications

AMS 5512 Sheet, Strip and Plate 

AMS 5646 Bar

AMS 5654 Bar

UNS : S34700

WS 1.5446

MIL-S-6721

TYPICAL MECHANICAL PROPERTIES (Typical Room Temperature Properties)

Disclaimer

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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