Chemical Composition

Grade Symbol	UNS Number	Alloy	Elements	Composition %
F6NM	S41500	13% chromium, 4% nickel	Carbon	0.05 max
			Manganese	0.50 - 1.00
			Phosphorus	0.030 max
			Sulfur	0.030 max
			Silicon	0.60 max
			Nickel	3.5 - 5.5
			Chromium	11.5 - 14.0
			Molybdenum	0.50 - 1.00

Mechanical Properties

Property	Value
Tensile Strength, min, ksi [MPa]	115 [790]
Yield Strength, min, ksi [MPa]	90 [620]
Elongation in 2 in. [50mm] or 4D, min, %	15
Reduction or Area, min, %	45
Brinell Hardness Number, HBW	295 max

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.