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Hastelloy B-2 Bars & Rods

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Hastelloy® B-2 Alloy Bars & Rods

We specialize in manufacturing Hastelloy® B-2 (N10665 / 2.4617) nickelmolybdenum alloy bars and precision rods, engineered for exceptional corrosion resistance in strong reducing acid and harsh corrosive environments.

Our Hastelloy B-2 bars are produced from high purity alloy raw materials through hot forging, cold drawing and precision machining, featuring uniform structure, stable mechanical properties, tight dimensional tolerance and excellent resistance to hydrochloric acid, stress corrosion and intergranular corrosion.

These Hastelloy B-2 bars and rods are widely applied in chemical processing, pickling equipment, petrochemical facilities, pharmaceutical machinery, waste treatment and other extreme working conditions.

Backed by ISO 9001, ASME and strict quality inspection, we provide customized diameters, lengths and heat treatment conditions, dedicated to delivering high-performance Hastelloy B-2 bar solutions for global industrial customers.


Product Detail

Product Parameters

Chemical Composition

Physical Properties

Mechanical Properties

Product Parameters

Alloy Name Hastelloy B-2 Alloy
UNS N10665
W.Nr./EN 2.4617
Standard ASTM B335 / ASME SB335
Type Round Bars, Square Bars, Hexagonal Bars (Rods)
Condition Solution Annealed (Heat Treated)
Surface Solution Annealed (Heat Treated)

Chemical Composition

Nickel (Ni) 61.0% min
Molybdenum (Mo) 26.0 – 30.0%
Iron (Fe) ≤ 2.0%
Chromium (Cr) ≤ 1.0%
Cobalt (Co) ≤ 1.0%
Manganese (Mn) ≤ 1.0%
Carbon (C) ≤ 0.02%
Silicon (Si) ≤ 0.1%
Phosphorus (P) ≤ 0.04%
Sulfur (S) ≤ 0.03%

Physical Properties

Density g/cm³ 9.22
Melting Range lb/cu in 0.333
°C 1345 – 1390
°F 2450 – 2530
Modulus of Elasticity GPa 217 (20°C)
ksi 31.5 x 10³ (70°F)
Thermal Expansion (20–538°C) µm/m·°C 11.2
Thermal Conductivity (100°C) W/m·K 10.5

Mechanical Properties

Temperature Yield strength Tensile strength Elongation
Rp 0.2 Rm A
°C °F MPa ksi MPa ksi %
20 68 ≥ 310 ≥ 45 ≥ 793 ≥ 793 ≥ 40

Applications of Hastelloy® B-2 Alloy Bars & Rods

Chemical & Acid Processing

Used in reaction vessels, heat exchangers and valve parts. Excellent resistance to hydrochloric acid, sulfuric acid and reducing media ensures reliable performance in highly corrosive acid environments.

plant picture, clean room equipment and stainless steel machines
Petrochemical Engineering

Petrochemical Engineering

Applied in pump shafts, fasteners and reactor components. Resistant to stress corrosion cracking and pitting, maintaining stability in high-temperature and corrosive refining conditions.

Pickling & Surface Treatment

Used for heating rods, fixtures and conveying parts. Superior corrosion resistance to hot acidic solutions extends service life in metal pickling systems.

Pharmaceutical technician in sterile environment at pharmacy industry
Pharmaceutical Machinery

Pharmaceutical Machinery

Suitable for reactor shafts, mixing rods and precision parts. Provides stable corrosion resistance in corrosive production media and meets hygienic manufacturing requirements.

Waste & Environmental Treatment

Used in acidic wastewater treatment and flue gas desulfurization components. Withstands harsh corrosive media to ensure stable operation in environmental protection equipment.

Modern recycling facility with conveyor belts and bins full of plastic waste, showcasing sustainable waste management practices.

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  • Product Parameters

    Alloy Name Hastelloy B-2 Alloy
    UNS N10665
    W.Nr./EN 2.4617
    Standard ASTM B335 / ASME SB335
    Type Round Bars, Square Bars, Hexagonal Bars (Rods)
    Condition Solution Annealed (Heat Treated)
    Surface Solution Annealed (Heat Treated)

    Chemical Composition

    Nickel (Ni) 61.0% min
    Molybdenum (Mo) 26.0 – 30.0%
    Iron (Fe) ≤ 2.0%
    Chromium (Cr) ≤ 1.0%
    Cobalt (Co) ≤ 1.0%
    Manganese (Mn) ≤ 1.0%
    Carbon (C) ≤ 0.02%
    Silicon (Si) ≤ 0.1%
    Phosphorus (P) ≤ 0.04%
    Sulfur (S) ≤ 0.03%

    Physical Properties

    Density g/cm³ 9.22
    Melting Range lb/cu in 0.333
    °C 1345 – 1390
    °F 2450 – 2530
    Modulus of Elasticity GPa 217 (20°C)
    ksi 31.5 x 10³ (70°F)
    Thermal Expansion (20–538°C) µm/m·°C 11.2
    Thermal Conductivity (100°C) W/m·K 10.5

    Mechanical Properties

    Temperature Yield strength Tensile strength Elongation
    Rp 0.2 Rm A
    °C °F MPa ksi MPa ksi %
    20 68 ≥ 310 ≥ 45 ≥ 793 ≥ 793 ≥ 40
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