Designated as UNS N06985 or DIN 2.4619, Hastelloy G3 (also known as “Alloy G3”) is a nickel-chromium-iron alloy with additions of molybdenum and copper. It has good weldability and resistance to intergranular corrosion in the welded condition. The low carbon content helps prevent sensitization and consequent intergranular corrosion of weld-heat affected zones. Hastelloy G3 is generally used for flue gas scrubbers and for handling reducing acids such as phosphoric and sulfuric.

1. Composition Requirements

The Chemical Composition of Hastelloy G3, %
Ni	Balance
Cr	21.0-23.5
Fe	18.0-21.0
Co	≤5.0
Mo	6.0-8.0
W	≤1.50
Nb	≤0.5
C	≤0.015
Mn	≤1.0
Si	≤1.0
Cu	1.5-2.5

2. Mechanical Properties of Hastelloy G3

Tensile Strength, min.		Yield Strength, min.		Elongation, min.	Hardness, min.
Mpa	ksi	Mpa	ksi	%	HRB
690	100	320	47	50	79

3. Physical Properties of Hastelloy G3

Density	Melting Range		Specific Heat		Electrical Resistivity
g/cm3	°C	°F	J/kg. k	Btu/lb.°F	µΩ·m
8.14	1260-1345	2300-2450	452	0.108	1180

4. Product Forms

Hebei Metals supplies Hastelloy G3 material in the form of sheets, strips, coils, wires, bars, forgings, pipes, fittings or flanges.

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