Hastelloy® B & C

Hastelloy® B is a Nickel-molybdenum alloy and Hastelloy® C is a Nickel-chrome-molybdenum alloy.

Haynes Stellite alloys
Collection of Nickel alloys
- B: B-2, B-3
- C: C-22, C-276, C-2000
- D,G,N,W & X
Cast grades
- B2= N-7M (UNS N30007) sim. to N10665
- C22=CX-2MW (UNS N26022) sim. To N06022

Material Specifications

B2= N-7M (UNS N30007)
- Ni69% (bal), Mo 28%, Fe2%,Cr1%
C22=CX2MW (UNS N26022)
- Ni56%(bal), Cr22%,Mo13%,Fe3%,Nb3%

Typical Properties

	B2	C22
Tensile	525	550 min N/mm2
Yield	275	240 min N/mm2
Elongation	20%	30%
Density	8.1	8.7 g/cm3
P/T rating Similar to B16.34 group 3.7 or 3.8 (20 bar for class 150)

Corrosion Properties

B2 Good
C22 Outstanding
- Corrosion fatigue, crevice corrosion
Both poor re:fouling

Additional Uses & Comments

Resistant to a wide range of acids, often at high temperatures
Not generally known for seawater use
Acceptable to NACE