Hastelloy G-30 (UNS N06030 / W.Nr. 2.4603)

Hastelloy G-30 (UNS N06230 / W.Nr. 2.4603) is an improved version of nickel-chromium-iron-molybdenum-copper alloy G-3. With higher chromium, added cobalt and tungsten, the G-30 shows superior corrosion resistance over most other nickel and iron based alloys in commercial phosphoric acids as well as complex environments containing highly oxidizing acids. The resistance of the alloy to the formation of grain boundary precipitates in the heat-affected zone makes it suitable for use in most chemical process applications in the as-welded condition.

Equivalent Grades

Hastelloy G-30NS3404Hastelloy G-30N06030NiCr30FeMo2.4603

Chemical Composition, %

Hastelloy G-30≤0.03≤0.80≤1.50≤0.04≤0.0328.0-31.5Bal≤5.004.0-6.01.5-4.00.3-1.51.0-2.413.0-17.0

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B462, ASTM B581, ASME SB462, ASME SB581
Plate, Sheet and StripASTM B575, ASME SB575
Pipe and TubeASTM B619, ASTM B622, ASTM B626, ASME SB619, ASME SB622, ASME SB626
Welding ProductAWS A5.14 ERNiCrMo-11, ASME Ⅱ SFA-5.14 ERNiCrMo-11, ASME Ⅸ F-No.45
OthersASTM B366, ASTM B462, ASME SB366, ASME SB462


Hastelloy G-30 shows superior corrosion resistance in commercial phosphoric acids as well as complex environments containing highly oxidizing acids such as nitric/hydrochloric, nitric/ hydrofluoric and sulfuric acids.


  • Phosphoric Acid Service
  • Sulfuric Acid Service
  • Nitric Acid Service
  • Nuclear Fuel Reprocessing
  • Nuclear Waste Processing
  • Pickling Operations
  • Petrochemicals
  • Fertilizer Manufacture
  • Pesticide Manufacture
  • Gold Ore Extraction