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Chemical Composition

Identification Symbol UNS Number Grade Elements Composition %
F44 S31254 20 chromium, 18
nickel, 6 molybdenum,
low carbon
Carbon 0.020 max
Manganese 1.00 max
Phosphorus 0.030 max
Sulfur 0.10 max
Silicon 0.80 max
Nickel 17.5 - 18.5
Chromium 19.5 - 20.5
Molybdenum 6.00 - 6.5
Copper 0.50 - 1.00
Nitrogen 0.18 - 0.25

Mechanical Properties

PropertyValue
Tensile Strength, min, ksi [MPa] 94 [650]
Yield Strength, min, ksi [MPa] 44 [300]
Elongation in 2 in. [50mm] or 4D, min, % 35
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.