Item # B-2, Hastelloy® Alloy B-2 on High Performance Alloys, Inc.


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	Item # B-2 Hastelloy® Alloy B-2

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Hastelloy® Alloy B-2
Hastelloy® alloy B-2 (UNS N10665) Ni 68, Mo 28, Fe 2, Co 1, Cr 1
Significant resistance to reducing environments. This alloy also provides resistance to pure sulfuric acid and a number of non-oxidizing acids. Industry users like the resistance to a wide range of organic acids and the resistance to chloride-induced SCC.

One of its advantages is the heat affected weld zones have reduced precipitation of carbides and other phases to ensure uniform corrosion resistance. Chemical processing industry involving sulfuric, phosphoric, hydrochloric and acetic acid. Temperature uses vary from ambient to 1500°F depending on the environments

Alloy B-2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulfuric, acetic and phosphoric acids. Alloy B-2 provides resistance to pure sulfuric acid and a number of non-oxidizing acids. The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if B-2 is used where iron or copper is present in a system containing hydrochloric acid.

Industry users like the resistance to a wide range of organic acids and the resistance to chloride-induced stress-corrosion cracking.

Hastelloy Alloy B-2 resists the formation of grain boundary carbide precipitates in the weld heat-affected zone, making it suitable for most chemical process applications in the as-welded condition. The heat-affected weld zones have reduced precipitation of carbides and other phases to ensure uniform corrosion resistance.
Alloy B-2 also has excellent resistance to pitting and stress corrosion cracking.

Nominal Chemistry · Mechanical · General Resistance · Specifications · Machinability Ratings · Machinability Ratings · Formability · Welding · Tool Sharpness · Tools · Positive Cuts · Applications · Machining

Nominal Chemistry

Ni		bal.

Mo		28.0

Fe		2.0 max

Cr		1.0 max

C		0.010 max

Si		0.10 max

Mechanical

Ultimate		132 ksi

Yield Strength		57 ksi

Elongation		55 %

Hardness		B 98 (Rockwell)

General Resistance

UNS		N10665

Specifications

Plate		ASME SB333 ASTM B333

Bar		ASME SB335 ASTM B335

Seamless Pipe And Tube		ASME SB622 ASTM B622

Welded Pipe		ASME SB619 ASTM B619

Welded Tube		ASME SB626 ASTM B626

Fittings		ASME SB366 ASTM B366

Electrodes		ASME SFA 5.11 (ENiMo-7) AWS A 5.11 (ENiMo-7)

Bare Weld Rods		ASME SFA 5.14 (ENiMo-7) AWS A 5.14 (ENiMo-7)

Machinability Ratings

Capacity		Machine should be rigid and overpowered as much as possible.

Rigidity		Work piece and tool should be held rigid. Minimize tool overhang.

Lubrication		Lubricants are desirable, soluble oils are recommended especially when using carbide tooling.

Machinability Ratings

Nickel & cobalt base corrosion, temperature and wear-resistant alloys are classified as moderate to difficult when machining, however, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. During machining these alloys work harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations

Formability

Hastelloy Alloy B-2 does work harden, but can be formed when the proper precautions are taken. Sheet (0.063" thick) in the heat treated condition at 1950 °F and rapid quenched has an average olsen cup depth of 0.57" or 14.5mm.

Welding

Hastelloy Alloy B-2 resists the formation of grain boundary carbide precipitates in the weld heat-affected zone, making it suitable for most chemical process applications in the as-welded condition. The heat-affected weld zones have reduced precipitation of carbides and other phases to ensure uniform corrosion resistance.

Tool Sharpness

Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.

Tools

Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.

Positive Cuts

Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.

Applications

Superior resistance to hydrochloric acid, aluminum chloride catalysts and other strongly reducing chemicals. Excellent high-temperature strength in inert and vacuum atmospheres.

Hastelloy Alloy B-2 is a nickel-molybdenum alloy particularly suited for equipment handling reducing chemical environments.

Applications in the chemical process industry involving sulfuric, phosphoric, hydrochloric and acetic acid. Temperature uses vary from ambient temperature to 1500 °F depending on the environments.

Machining

Item # B-2 Hastelloy® Alloy B-2

Ni

Mo

Fe

Cr

C

Si

Ultimate

Yield Strength

Elongation

Hardness

UNS

Plate

Bar

Seamless Pipe And Tube

Welded Pipe

Welded Tube

Fittings

Electrodes

Bare Weld Rods

Capacity

Rigidity

Lubrication