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347 Stainless Steel | 347 Bar

Shapes Available

  • Plate
  • Round Bar
  • Sheet


  • Manufacturing
  • Oil Refining
  • Petrochemical

Industry Names

  • 347H
  • 347 Stainless


  • Stainless Steel


  • AMS 5512
  • ASME SA240
  • ASTM A262 Practice E
  • UNS S34700
  • UNS S34709


  • Distributor Trays and Thermowells
  • Equipment In and Around Reactors
  • Fired Heater Tubes
  • Fluid Catalytic Cracking Units (FCC)
  • Hanger Rods
  • Oil Refineries


  • Good Resistance to Inter-Granular Corrosion in the As Welded Condition.
  • Maintains Good Corrosion Resistance in Applications Where the Temperature is Between 800°F and 1500° F

347 Stainless Steel is an austenitic stainless steel that contains chromium and nickel. This material is stabilized by a columbium and tantalum combination. The additions of these elements promotes improved inter-granular corrosion resistance. 347 stainless is non magnetic and has similar corrosion resistance to 304 stainless steel.

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Metal Properties
Property Value
Melting Range 2550-2635 °F
.2% Yield Strength 30 ksi
Density 0.286 lb/inch³
Elongation 40 %
Hardness Max, Brinell 201
Ultimate Tensile Strength 75 ksi
Chemical Composition
Element Min Max
C .04 .08
Cb+Ta Cb10x 1.0
Cr 17.0 19.0
Fe - Bal
Mn - 2.0
Ni 9.0 13.0
P - .045
S - .03
Si - .75

DISCLAIMER: The information provided on this Web site, technical or otherwise, is merely for informational purposes, and is not intended to serve as a guide, manual, instructions, or any kind reference for proper safety procedures or material purchasing. Michlin Metals makes no warranty, express or implied, based on the statements on this Web site and, as such, will not be liable for any damages, either direct or indirect, including but not limited to consequential damages, such as damages for loss of profits, that may arise based on reliance on the information provided on this Web site. Some information has been referenced from reliable industry sources. Tradenames listed are the sole property of the tradename owners. Michlin Metals typically provides branded products through its relationships with mills and authorized re-sellers. Equivalent non-branded product is sometimes also available through certified sources of such products. Michlin Metals will never substitute non-branded product when branded product is requested.

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