UNS Number N010665

Hastelloy B-2 is a solid solution strengthened, nickel-molybdenum alloy, with significant resistance to reducing environments like hydrogen chloride gas, and sulfuric, acetic and phosphoric acids. Molybdenum is the primary alloying element which provides significant corrosion resistance to reducing environments. This nickel steel alloy can be used in the as-welded condition because it resists the formation of grain-boundary carbide precipitates in the weld heat-affected zone.
This nickel alloy provides excellent resistance to hydrochloric acid at all concentrations and temperatures. In additions, Hastelloy B-2 has excellent resistance to pitting, stress corrosion cracking and to knife-line and heat-affected zone attack. Alloy B-2 provides resistance to pure sulfuric acid and a number of non-oxidizing acids.

Available Forms of Hastelloy B-2 at Rooplaxmi Steels:

• Round Bars
• Sheets        
• Wires

Characteristics of Hastelloy B-2:

• Great resistance to stress corrosion cracking and pitting
• Significant resistance to reducing conditions like hydrogen chloride, sulfuric, acetic and phosphoric acids
• Resistance to hydrochloric acid at all concentrations and temperatures

Hastelloy B-2 Chemical Composition, %

 

 

Ni	Mo	Fe	C	Co	Cr	Mn	Si
Balance	26.0-30.0	2.0 max	0.02 max	1.0 max	1.0 max	1.0 max	0.10 max

P	S
0.04 max	0.030 max

 

 

 

 

Applications of Hastelloy B-2:

• Chemical processes
• Vacuum furnaces
• Mechanical components in reducing environments

 

Hastelloy B-2 ASTM Specifications:

 

Pipe Smls	Pipe Welded	Tube Smls	Tube Welded	Sheet / Plate	Bar	Forging	Fitting
B622	B619	B622	B626	B333	B335	B564	B366

 

Mechanical Properties of Hastelloy B-2:
Annealed Material

Product Form	Tensile Min. (ksi)	0.2% Yield Min. (ksi)	Elongation Min (%)
Rod & Bar	110	51	40
Sheet/Plate	110	51	40
Welded Pipe & Tube	110	51	40
Seamless Pipe & Tube	110	45	40