Designated as UNS N06030 or DIN 2.4603, Hastelloy G-30 is a nickel-chromium-iron material which has excellent resistance to phosphoric acid environment(wet process). It is also moderately resistant to chloride-induced localized attack, which can be a problem beneath deposits in the evaporators used to concentrate phosphoric acid. Furthermore, G-30 alloy is less susceptible to chloride-induced stress corrosion cracking than the stainless steels. Due to the high chromium content Hastelloy G30 is also very resistant to other oxidizing acids, such as nitric, and mixtures containing nitric acid. The appreciable amount of molybdenum and copper addition makes it moderately resistant to reducing acids, such as hydrochloric and sulfuric. Hastelloy G-30 is widely used in phosphoric, sulfuric, and nitric acid processing industries, nuclear piping, petrochemical and fertilizer industries.

1. Chemical Composition of Hastelloy G-30

The Chemical Composition of Hastelloy G30, %
Ni	Balance
Co	≤5.0
Cr	28.0-31.5
Mo	4.0-6.0
W	1.5-4.0
Fe	13.0-17.0
Si	≤0.8
Mn	≤1.5
C	≤0.03
Cb+Ta	0.3-1.5
Cu	1.0-2.4
P	≤0.04
S	≤0.02

2. Typical Physical Properties

Density		Electrical Resistivity		Thermal Conductivity		Melting Point
lb/in3	g/cm3	µohm.in	µohm.m	btu.in/h.ft2.°F	W/m.°C	°C	°F
0.297	8.22	45.7	1.16	69	10	1371	2500

3. Product Forms and Standards of Hastelloy G-30

Product Form	Standard
Sheet, Plate & Strip	ASTM B582
Billet, Rod & Bar	ASTM B581, B472
Seamless Pipe & Tube	ASTM B622
Welded Pipe & Tube	ASTM B619, B626
Fittings	ASTM B366, B462
Forgings	ASTM B462

*The mechanical properties vary according to different forms and heat treatment conditions.

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