CG3M Stainless Steel Properties, Composition & Equivalent

CG3M ASTM A743 A744 A351       Grade(UNS):J92999       Alloy Family: Austenitic Stainless Steel        Equivalent: 317L stainless steel

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What is CG3M Stainless Steel ?

CG3M alloy is an austenitic alloy based on molybdenum. Compared with conventional Cr-Ni austenitic stainless steel such as CF3 alloy, it has stronger chemical corrosion resistance.

Compared with conventional stainless steel, this alloy has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance. It is a low carbon grade, which has anti sensitization performance during welding and heat treatment.

The alloy has good sea water resistance and corrosion resistance, which is often used to make marine equipment and chemical products.


CG3M Chemical Composition

C Mn Si P S Cr Ni Mo
Max 0.03 1.50 1.50 0.04 0.04 21.0 13.0 3.0
Min 18.0 9.0 2.0

Heat treatment

Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid
cool by other means

Mechanical Properties

Reduction of Area, min / %
Yield Strength, minKsi – 37, MPa – 240
Tensile Strength, minKsi – 75, MPa – 515
Elongation[50mm], min / %25 %


  • Excellent corrosion resistance
  • Excellent ductility
  • Strong stress resistance
  • High compressive strength
  • Low carbon


  • Marine equipment
  • Chemical products
  • Antioxidant equipment

CG3M equivalent

317L stainless steel

National standard: ASTM

317L stainless steel is more resistant to the corrosion of sulfuric acid solution than conventional chromium nickel stainless steel. The corrosion resistance of the alloy increases with the increase of molybdenum composition. 317L can withstand up to 5% sulfuric acid at temperatures up to 120 ° f (49 ° C). These alloys exhibit excellent corrosion resistance at temperatures below 100 ° f (38 ° C) and resist higher concentrations of solutions.

317L stainless steel has excellent oxidation resistance, and the scale formation rate is low when the temperature is not higher than 1600-1650 ° f (871-899 ° C) in ordinary atmosphere.

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