Type 347 is available in Sheet, Plates, Bars (Flat, Hex, Round, Square), Forging Stock, Tube, Welding Wire 347 Foil (Shim) is available in various thicknesses. For all stock availability of contact Sales.
| Grade | US Aerospace/Military | US Commercial | British Specification | European Specification | Other |
| 347 347H 347 Tube |
AMS 5512 Sheet / strip / plate AMS 5556 Seamless/ welded tube AMS 5558 Welded /thin wall tube AMS 5571 Seamless tube, AMS 5575 Welded tube AMS 5646 Bars / wire / forging AMS 5654 Bars (harsh steel quality) AMS 5674 Wire, AMS 5680 Wire, QQ-S-763, MIL-T-6737, MIL-T-8606 Seamless tube MIL-T-8606 Welded tube MIL-T-8808 Seamless tube MIL-T-8808 Welded tube, MIL-S-6721 |
ASTM A240 / ASME SA240 ASTM A167 / ASME SA167 ASTM A276 / ASME SA276 ASTM A314 / ASME SA314 ASTM A479 / ASME A479 |
BS 2S130 BS 2T66 Tube BS T72 Tube BS S527 Sheet BS 970; 347S17 EN58F / EN58G MSRR 6522 MSRR 6524 |
Werkstoff 1.4544 Werkstoff 1.4546 Werkstoff 1.4550 Werkstoff 1.5446* AFNOR Z6CNNb18-11 |
UNS S30347 |
| Chemical Composition Limits | ||||||||||||
| Weight % | C | P | Si | Ni | Mn | S | Cr | Cb + Ta | Fe | Co | Mo | Cu |
| 347 | 0.08 max | 0.040 max | 1.00 max | 9-12 | 2.0 max | 0.030 max | 17-19 | 10 x C min | Bal | 1.00 max only AMS 5646 |
0.75 max | 0.75 max |
| 347H | 0.04-0.10 | 0.040 max | 1.00 max | 9-12 | 2.0 max | 0.030 max | 17-19 | 10 x C min | Bal | |||
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 harsh steel 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.
| Material | Yield Strength (ksi) | Tensile Strength (ksi) | % Elongation | Hardness HB |
| Alloy 347 Sheet (Sol Trtd) AMS 5512 |
25 | 70-105 | 40 | - |
| Alloy 347 Bar (Sol Trtd) AMS 5646 |
- | - | - | 255 max |
Specifications
347 / 347H
AMS 5512 Sheet / strip / plate
AMS 5556 Seamless/ welded tube
AMS 5558 Welded /thin wall tube
AMS 5571 Seamless tube
AMS 5575 Welded tube
AMS 5646 Bars / wire / forging
AMS 5654 Bars (harsh steel quality)
AMS 5674 Wire
AMS 5680 Wire
QQ-S-763
MIL-T-6737
MIL-T-8606 Seamless tube
MIL-T-8606 Welded tube
MIL-T-8808 Seamless tube
MIL-T-8808 Welded tube
MIL-S-6721
ASTM A240 / ASME SA240
ASTM A167 / ASME SA167
ASTM A276 / ASME SA276
ASTM A314 / ASME SA314
ASTM A479 / ASME A479
BS 2S130
BS 2T66 Tube
BS T72 Tube
BS S527 Sheet
BS 970; 347S17
EN58F / EN58G
MSRR 6522
MSRR 6524
Werkstoff 1.4544
Werkstoff 1.4546
Werkstoff 1.4550
Werkstoff 1.5446*Tube
AFNOR Z6CNNb18-11
UNS S30347
We export Stainless Steel 347 to below countries.
Harsh steel is a major stockist and Exporter of Stainless Steel 347 to many countries of the world such as Singapore, Brisbane, Sydney, Melbourne, Australia, Houston, TX, San Diego, San Francisco, Atlanta, USA, Brentford, United Kingdom, Phoenix, Ireland, New Zealand and Canada, Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, New foundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran, Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton.