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

o     B: B-2, B-3

o     C: C-22, C-276, C-2000

o     D,G,N,W & X

•      Cast grades

o     B2= N-7M (UNS N30007) sim. to N10665

o     C22=CX-2MW (UNS N26022) sim. To N06022

Material Specifications

•      B2= N-7M (UNS N30007)    

o     Ni69% (bal), Mo 28%, Fe2%,Cr1%

•      C22=CX2MW (UNS N26022)

o     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

o     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