Hastelloy B-2^* Specification
*Trade name of Haynes International

Hastelloy B-2 is a Nickel base wrought alloy with excellent resistance to hydrochloric acid at all concentrations and temperatures from ambient to high. B-2 also withstands hydrogen chloride, sulphuric, hydrofluoric, acetic and reagent grade phosphoric acids. This alloy also has excellent resistance to stress corrosion cracking and to knife line and heat affected zone attack. Hastelloy B-2 is not recommended in the presence of ferric or cupric salts.

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

Approximate Chemical Composition
Ni	69%
Mo	28%
Fe	2% max
Cr	1% max
Co	1% max

Properties
DENSITY	9.22 g/cm3	0.333 lb/in3
MELTING POINT	1370oC	2500oF
COEFFICIENT OF EXPANSION	10.3 µm/m °C (20 - 100°C)	5.7 x 10-6 in/in °F (70 - 212°F)
MODULUS OF RIGIDITY	84 kN/mm2	12183 ksi
MODULUS OF ELASTICITY	217 kN/mm2	31474 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	900 - 1100 N/mm2	131 - 159 ksi	-200 to +400oC	-330 to +750oF
Spring Temper	1400 - 1900 N/mm2	203 - 276 ksi	-200 to +400oC	-330 to +750oF