UNS N10675 / Alloy B-3

Hastelloy® B-3 Supplier | ZYTC Alloy China Manufacturer. We provide UNS N10675 alloy with excellent resistance to HCl, sulfuric acid, and pitting corrosion. Perfect for chemical process vessels, piping, and fluoride-bearing media. Cost-effective sheets, plates, bars, pipes, and wires available. Request a quote today.

Delivery :

FOB

minimum order :

50 kilograms

Supply Ability :

5000kilograms / Month

Stock Time :

7-10Day

Country of Origin :

CHINA

Quantity :

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Based in China, ZYTC Alloy manufactures and supplies Hastelloy® B-3 (UNS N10675) for the chemical processing, pharmaceutical, and related industries. The alloy is designed for applications requiring consistent performance in highly reducing environments.

1. Product Specifications & Properties

Alloy B-3 is a nickel-molybdenum alloy developed as an improved alternative to earlier B-type alloys like B-2. It maintains excellent corrosion resistance in reducing media while offering better thermal stability, which reduces the risk of weld heat-affected zone (HAZ) cracking during fabrication.

Chemical Composition (%, range)

Element	Content
Nickel, Ni	65 min
Molybdenum, Mo	27-32
Cobalt, Co	3 max
Manganese, Mn	3 max
Tungsten, W	3 max
Iron, Fe	1-3
Chromium, Cr	1-3
Aluminum, Al	0.5 max
Copper, Cu	0.2 max
Carbon, C	0.01 max

Mechanical Properties (Typical, 0.125"section)

Property	Metric	Imperial
Tensile Strength	0.88 GPa	129 ksi
Yield Strength (0.2% offset)	0.44 GPa	64.5 ksi
Elongation at Break	57.5%	57.5%

2. Operating Conditions & Selection Guidelines

Ideal Media: Suitable for hydrochloric, sulfuric, acetic, formic, and phosphoric acids across a wide range of concentrations and temperatures. Effective against pitting and stress-corrosion cracking in chloride-bearing reducing environments
Temperature Range: Maintains mechanical integrity in equipment operating from ambient up to elevated temperatures typical of acid processing
Critical Limitation: Not intended for strongly oxidizing media (e.g., nitric acid, ferric ions). Performance degrades in environments containing significant oxidizing species
Common Applications: Reaction vessels, heat exchangers, piping systems, acid storage tanks, vacuum furnace components, and pharmaceutical processing equipment handling aggressive catalysts

3. Fabrication & Material Comparison

Fabrication Characteristics: Can be cold or hot formed using standard equipment. Exhibits improved ductility compared to B-2, reducing cracking risk during forming operations
Welding Considerations: Suitable for GTAW/TIG, GMAW, and SMAW methods. Lower tendency for grain-boundary carbide precipitation allows greater flexibility in heat input control. Post-weld heat treatment is generally not required for corrosion resistance
Advantage Over B-2: Improved thermal stability minimizes the risk of intergranular attack in the HAZ. Offers wider fabrication latitude without sacrificing corrosion performance in reducing acids
Product Forms: Available as sheet, plate, bar, seamless and welded pipe, and wire

Contact ZYTC Alloy for technical consultation or to request a quotation. Our team can assist with material verification and selection based on your specific process parameters.

Contact Us

Email:daisy@zytcsteel.com

WhatsApp/WeChat: +86 17335753350