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Chemical Composition

Grade Symbol UNS Number Alloy Elements Composition %
F310 S31000 25 chromium, 20 nickel 310G Carbon 0.25 max
Manganese 2.00 max
Phosphorus 0.045 max
Sulfur 0.030 max
Silicon 1.00 max
Nickel 19.00 - 22.00
Chromium 24.00 - 26.00

Mechanical Properties

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

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.