Hastelloy G-30^* Specification
*Trade name of Haynes International

G-30 is a high Nickel based alloy which shows superior corrosion resistance over most other Nickel and Iron based alloys in phosphoric acids as well as many complex environments containing highly oxidising acids such as nitric, hydrofluoric and sulphuric.

Good Mechanical Properties at Elevated Temperatures	No
Corrosion Resistant at Ambient Temperatures	Yes
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures	No
Oxidation Resistant	Yes
Precipitation Hardenable	No

Approximate Chemical Composition
Ni	43%
Cr	28 - 31.5%
Fe	13 - 17%
Mo	4 - 6%
Co	5% max
W	1.5 - 4%

Properties
DENSITY	8.22 g/cm3	0.297 lb/in3
MELTING POINT	1399oC	2550oF
COEFFICIENT OF EXPANSION	12.8 µm/m °C (20 - 100°C)	7.1 x 10-6 in/in °F (70 - 212°F)
MODULUS OF RIGIDITY	77.6 kN/mm2	11255 ksi
MODULUS OF ELASTICITY	202 kN/mm2	29298 ksi

CONDITION OF SUPPLY	HEAT TREATMENT (AFTER FORMING)
Annealed/Spring Temper	Stress relieve at 400 - 450oC (750 - 840oF) for 2 hours and air cool.

CONDITION	APPROX TENSILE STRENGTH		APPROX SERVICE TEMPERATURE
Annealed	650 - 900 N/mm2	94 - 131 ksi	-200 to +400oC	-330 to +750oF
Spring Temper	1000 - 1500 N/mm2	145 - 218 ksi	-200 to +400oC	-330 to +750oF