hastelloy alloy b2 uns n10665

hastelloy alloy b2 uns n10665

Hastelloy B-2 Alloy

Common Trade Names: 
Hastelloy B2, Alloy B2; Nimofer 6928

Alloy B2 (UNS N10665 / W.Nr. 2.4617) is a solid solution strengthened, nickel-molybdenum alloy, typically used in extreme reducing conditions. B2 has significantly lower carbon, silicon and iron compared to its’ predecessor, Alloy B (UNS N10001), making the alloy less susceptible to decreased corrosion resistance in the weld zone, in the as-welded condition. Controlling other alloying elements such as iron and chromium
solved other issues concerning fabricability. Stringent chemistry control along with years of development has resulted in the alloy used today, both in Alloy B2 and Alloy B-3 Today, Alloy B2 with restricted chemistry can be used in the welded condition and is less susceptible to SCC under many conditions. As always, care must taken in selecting the right alloy for the desired application.

Alloy B2 should not be used at temperatures between 1000°F and 1600°F as the alloy forms secondary phases that could decrease the ductility of the material.

Available Product Forms: 
Rod, bar, forgings, wire, plate, sheet, strip, pipe, tube, pipe fittings. Flanges, Forged fittings, valve parts.

Specifications

Hastelloy B-2 is covered by the following specifications:

Rod, Bar, Wire and Forging Stock: ASTM B564, ASTM B472,

 Plate, Sheet and Strip: - ASTM B 333;

Pipe and Tube: - ASTM B622.

Pipe fittings: ASTM B366 WPHB-2

flanges, Forged fittings, valve parts: ASTM B462

Chemical Composition

Ni................ Balance 
Cr................1.00 Max.
Mo............. 26.0 to 30.0 
Mn..............1.00 Max.
Fe............... 2.00 Max. 
Si.................0.10 Max.
C................ 0.02 Max. 
P..................0.040 Max.
Co.............. 1.00 Max. 
S..................0.030 Max.

mechanical property:

specifications:

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