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

Property	Value
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.