UNS N10665 / Alloy B-2

Hastelloy® B-2 Supplier | ZYTC Alloy China Manufacturer. We supply high-quality, cost-effective UNS N10665 alloy products—pipes, tubes, sheets, & bars. Excellent resistance to HCl, reducing acids, pitting, and stress corrosion cracking for chemical processing & refining.

Delivery :

FOB

minimum order :

50 kilograms

Supply Ability :

5000kilograms / Month

Stock Time :

7-10Day

Country of Origin :

CHINA

Quantity :

Contact Now

As a leading manufacturer based in China, ZYTC Alloy supplies Hastelloy® B-2 (UNS N10665) products designed for severe service conditions across the chemical processing, petrochemical, and pharmaceutical industries.

ZYTC Alloy offers a comprehensive range of product forms, available in Plate, Sheet, Pipe, Fittings, Flanges, and Forgings, all manufactured to meet ASTM/ASME specifications.

1. Product Specifications & Properties

Alloy B-2 is a nickel-molybdenum alloy with approximately 28% molybdenum content, offering superior resistance to reducing corrosive media. Unlike chromium-dependent stainless steels, B-2 relies on molybdenum for protection in non-oxidizing environments.

Key specifications:

Low Carbon Design (≤0.01%): Minimizes grain-boundary carbide precipitation during welding

Solid-Solution Strengthened: Provides balanced mechanical properties without heat treatment

Typical Tensile: 914 MPa | Yield: 396 MPa | Elongation: 55%

Chemical Composition (%, typical)

Element	Content
Nickel, Ni	69
Molybdenum, Mo	28
Iron, Fe	2
Chromium, Cr	1
Cobalt, Co	1
Manganese, Mn	1
Silicon, Si	0.10
Carbon, C	0.01

Mechanical Properties

Property	Metric	Imperial
Tensile Strength	914 MPa	133,000 psi
Yield Strength (0.2% offset)	396 MPa	57,400 psi
Elastic Modulus	217 GPa	31,500 ksi
Elongation (in 50.8 mm)	55%	55%
Hardness, Rockwell B	98	9

2. Operating Conditions & Selection Guidelines

Ideal Media: Hydrochloric acid at various concentrations, dilute sulfuric acid, phosphoric acid, and other reducing chemicals

Temperature Range: Maintains structural integrity up to approximately 800°C in reducing atmospheres

Critical Limitation: Not recommended for oxidizing environments containing ferric or cupric ions, dissolved oxygen, or other oxidizing agents

Common Applications: Reactor vessels, heat exchangers, piping systems, acid storage tanks, and pharmaceutical processing equipment

3. Fabrication & Material Comparison

Welding Considerations: Readily welded using GTAW/TIG or GMAW methods. Due to high molybdenum content, maintain low heat input and controlled interpass temperatures to prevent hot cracking

Advantage Over Stainless Steels: Eliminates risk of intergranular corrosion in as-welded condition without post-weld heat treatment

Versus C-276: B-2 provides superior performance specifically in pure reducing acids at lower cost, while C-276 suits oxidizing/reducing cycling conditions

Contact ZYTC Alloy for application engineering support or to request a quotation. Our technical team can assist with material selection based on your specific process conditions.

Contact Us:

Email:daisy@zytcsteel.com

WhatsApp/WeChat: +86 17335753350