Nickel Alloy Hastelloy B-3 Tubes – Durable & High-Performance Material

Hastelloy B-3 is a nickel-molybdenum alloy engineered for superior resistance to strongly reducing environments, such as hydrochloric acid and other aggressive chemicals. When manufactured into tubes, this alloy offers excellent mechanical strength, corrosion resistance, and thermal stability, making it ideal for high-performance industrial applications.

Material Composition and Properties

Hastelloy B-3 tubes are composed mainly of nickel and molybdenum, with enhanced stability to resist chemical attack. The key features include:

• Excellent Corrosion Resistance: Outstanding performance in highly acidic environments, including hydrochloric, sulfuric, and phosphoric acids.

• Superior Thermal Stability: Maintains strength and corrosion resistance at elevated temperatures.

• High Mechanical Strength: Provides durability and resistance to cracking under high stress.

• Enhanced Fabricability: Allows for efficient forming, machining, and welding without significant carbide precipitation.

Applications of Hastelloy B-3 Tubes

Due to their excellent resistance to aggressive chemicals and high durability, Hastelloy B-3 tubes are widely used in:

1. Chemical Processing Industry: Utilized in heat exchangers, piping systems, pressure vessels, and reactors handling corrosive chemicals.

2. Aerospace and Defense: Essential for high-performance structural components exposed to extreme conditions.

3. Marine and Offshore Engineering: Ideal for seawater-resistant tubing applications.

4. Pharmaceutical and Biotechnology Industry: Used in sterile processing equipment requiring high corrosion resistance.

5. Energy and Power Generation: Applied in nuclear, geothermal, and petrochemical sectors requiring high-strength, corrosion-resistant tubing.

Grades and Standards

Hastelloy B-3 tubes conform to international quality and performance standards, including:

• UNS Number: N10675

• ASTM Standards: ASTM B622, ASTM B619 (Seamless & Welded Tubes)

• EN/DIN Equivalent: 2.4600

Manufacturing Process

The production of Hastelloy B-3 tubes follows stringent quality control measures to ensure precision and performance:

1. Melting and Alloying: Produced using vacuum induction melting (VIM) or electric arc furnace (EAF) to maintain purity.

2. Tube Forming (Seamless or Welded): Ensures optimal mechanical properties and dimensional accuracy.

3. Annealing and Heat Treatment: Enhances corrosion resistance and improves mechanical stability.

4. Surface Finishing: Options include pickling, passivation, and polishing for optimized performance.

5. Quality Testing: Includes mechanical property evaluation, non-destructive testing (NDT), and dimensional inspections.

User Requirements and Customization

Industries using Hastelloy B-3 tubes often require specific customizations to meet operational demands. These include:

• Varied Tube Dimensions: Available in different diameters, wall thicknesses, and lengths to suit specific applications.

• Surface Treatment Options: Bright annealed, oxide-free, or coated for enhanced protection.

• Precision Machining and Cutting Services: Ensuring compatibility with various industrial processes.

• Compliance with International Standards: Meeting ASTM, ASME, and other regulatory certifications.