347 Stainless Steel Sheet & Coil - AMS 5512
Type 347 is a stabilized stainless steel with the addition of coumbium and tantalum. This material offers good mechanical properties with higher creep and stress rupture characteristics than other grades. 347 is also advantageous in applications that require omission of the annealing process after welding.
Common Applications of 347 Stainless Steel
- Aircraft collector rings
- Aircraft exhaust stacks
- Boiler casings
- Cabin heaters
- Furnace heating elements
- heavy wall welded equipment
We suppy 347 stainless steel sheet in widths of 48" down to .250" and standard lengths of 96" and 120" but are capable of shearing and leveling to your required lengths and widths. 347 coil can also be slit to your desired width.
Specifications and Related Metals
- AMS 5512
- ASTM A269
- ATI 347 (™ Allegheny Technologies)
All of our 347 sheet and coil are ordered to specific decimal thicknesses. The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.
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347 General Properties
Type 347 is stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). The material is stabilized by the addition of columbium and tantalum.
347 is also advantageous for high temperature service because of their good mechanical properties. The material offers higher creep and stress rupture properties than Type 304 and, particularly, Type 304L which might also be considered for exposures where sensitization and intergranular corrosion are concerns. This results in higher elevated temperature allowable stresses for these stabilized alloys for ASME Boiler and Pressure Vessel Code applications.
Applications for 347 include those for welded construction and parts subjected to heating in the carbide precipitation range, aircraft collector rings, aircraft exhaust stacks, boiler casings, cabin heaters, carburetor air intensifier tubes, exhaust manifolds, fasteners, fire walls, flash boilers, flexible couplings, furnace heating elements, jet engine parts, large mufflers for stationary diesel engines, pressure vessels, stack liners, all-welded tank car for carrying chemicals, annealing box inner covers, collector rings, expansion joints, heat resistors, heavy wall welded equipment, welded tanks for storing organic chemicals, wire cloth and screens (industrial).
347 Chemical Composition
|Element||Maximum Unless Range is Specified|
|Columbium+Tantalum||-||10xC min to 1.00 max|
|Titanium||5x(C+N) min to 0.70 max||-|
Resistance to General Corrosion
Type 347 offers similar resistance to general, overall corrosion as the unstabilized chromium nickel Type 304. Heating for long periods of time in the chromium carbide precipitation range may affect the material's general resistance in severe corrosive media.
347 Physical Properties
|Grade||Density||Modulus of Elasticity in Tension||Melting Range|
|321||7.92||0.286||28 x 106 psi
|347||7.96||0.288||28 x 106 psi
|20-100||68-212||16.6 x 10-6||9.2 x 10-6|
|20-600||68-912||18.9 x 10-6||10.5 x 10-6|
|20-1000||68-1832||20.5 x 10-6||11.4 x 10-6|
|Temperature Range||W/m·K||Btu · in / hr · ft2 · °F|
|Temperature Range||J/kg K||Btu/lb · °F|
- H/m Annealed
- 1.02 Max
Mechanical Properties and yield Strength of 347
|Property||Type 321||Type 347|
|Yield Strength, 0.2% Offset
|Ultimate Tensile Strength,
|Percent Elongation in 2 in. or 51 mm||40.0||40.0|
RB (Sheet & Strip)