Stainless steel 347 is a columbium/tantalum stabilized austenitic chromium-nickel stainless steel. This material is stabilized against chromium carbide formation by the addition of columbium and tantalum. Since these elements have a stronger affinity for carbon than chromium, columbium-tantalum carbides precipitate within the grains instead of forming at the grain boundaries. 347 should be considered for applications requiring intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC) or for welding under conditions which prevent a post-weld anneal. 347 is non-magnetic.
Available Forms of Stainless Steel 347 at Rooplaxmi Steels:
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings
• Wire
Characteristics of Stainless Steel 347:
• High creep and stress rupture properties
• Good general corrosion resistance
• Resists polythionic acid stress corrosion cracking in hydrocarbon service
Stainless Steel 347 Chemical Composition, %:
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Nb+Ta |
0.08 max |
2.00 max |
0.045 max |
0.03 max |
0.75 max |
17.0-19.0 |
9.0-12.0 |
10XC-1.0 |
N |
Fe |
0.10 max |
Balance |
Application of Stainless Steel 347:
• Aircraft collector rings
• Aircraft exhaust stacks
• Boiler casings
• Cabin heaters
• Furnace heating elements
• Heavy wall welded equipment
Machining and Fabrication with Stainless Steel 347:
Stainless Steel 347 can be easily welded and processed by standard shop fabrication practices. Working temperatures of 2100–2250°F (1149–1232°C) are recommended for forging, upsetting and other hot working processes. Do not work this alloy at temperatures below 1700°F (927°C). Material must be water quenched or fully annealed after working to re-attain maximum corrosion resistance. The alloy is quite ductile and forms easily.
Welding Wire Designations:
USA AWS A5.9 – ER 347
Mechanical Properties of Stainless Steel 347:
At Room Temperature
Ultimate Tensile Strength |
75000 psi or 515 Mpa |
Yield |
(0.2 % offset) |
Elongation (in 50 mm) |
40 % |
Rooplaxmi Steels is a leading Stockholder of Nickel Alloys, Hastelloy, Inconel, Monel, Nickel Copper alloys, Titanium, Cobalt alloys, Duplex, Stainless Steel and other Nickel based alloys in the form of round bars, plate, Sheet, strip, wire, pipe, pipe fittings and flanges.
Quality is our prime concern. We are able to maintain high quality standards through our committed personnel and sound infrastructure. We ensure that finest quality material is used for our products. For ensure the quality of each material, we are providing Materials Test Certificate along with supply. Our team of experts maintain a vigil on the quality of the products.