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Chemical Composition

Identification Symbol UNS Number Grade Elements Composition %
F348 S34800 18 chromium, 8 nickel
modified with
columbium
348
Carbon 0.08 max
Manganese 2.00 max
Phosphorus 0.045 max
Sulfur 0.030 max
Silicon 1.00 max
Nickel 9.00 - 13.00
Chromium 17.00 - 20.00
Cobalt 0.20 max
tantalum 0.10 max

Mechanical Properties

PropertyValue
Tensile Strength, min, ksi [MPa] 75 [515]C
Yield Strength, min, ksi [MPa] 30 [205]
Elongation in 2 in. [50mm] or 4D, min, % 30
Reduction or Area, min, % 50
Brinell Hardness Number, HBW --

Heat Treatment

After hot working, forgings shall be cooled to a temperature below 1000 °F [538 °C] prior to heat treating in accordance with the requirements.