2.4617 Hastelloy Alloy Hastelloy B2 Rod For Acidic Chemical Applications
2.4617 Hastelloy B2 Rod – Ideal Material for Acidic Chemical Applications
Hastelloy B2 (UNS N10665, Werkstoff No. 2.4617) is a high-performance nickel-molybdenum alloy renowned for its exceptional resistance to reducing acids, including hydrochloric, sulfuric, acetic, and phosphoric acids. Its unique composition and microstructure make it an ideal choice for critical applications in chemical processing, pharmaceutical manufacturing, and petrochemical industries.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 26.0–30.0 |
| Iron (Fe) | Max 2.0 |
| Chromium (Cr) | Max 1.0 |
| Carbon (C) | Max 0.02 |
| Manganese (Mn) | Max 1.0 |
| Silicon (Si) | Max 0.10 |
| Cobalt (Co) | Max 1.0 |
| Phosphorus (P) | Max 0.04 |
| Sulfur (S) | Max 0.03 |
Mechanical Properties
| Property | Value |
|---|---|
| Density | 9.22 g/cm³ |
| Melting Point | 1330–1380°C |
| Tensile Strength | Min 760 MPa (110 ksi) |
| Yield Strength | Min 350 MPa (51 ksi) |
| Elongation | Min 40% |
Physical Properties
| Property | Value |
|---|---|
| Elastic Modulus | 179GPa |
| Thermal Conductivity | 17.3W/m·K at room temperature |
| Coefficient of Thermal Expansion | 11.7 μm/m·°C (20–93°C) |
ASTM Specifications
| Form | ASTM Standard |
|---|---|
| Bar | ASTM B335 |
| Sheet/Plate | ASTM B333 |
| Pipe (Seamless) | ASTM B622 |
| Pipe (Welded) | ASTM B619 |
| Tube (Seamless) | ASTM B622 |
| Tube (Welded) | ASTM B626 |
| Forging | ASTM B564 |
| Fitting | ASTM B366 |
Applications
Hastelloy B2 Rod is extensively used in:
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Chemical reactors and heat exchangers
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Piping systems handling hydrochloric acid
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Pharmaceutical manufacturing equipment
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Pollution control systems
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Pickling and acid cleaning operations
Corrosion Resistance
Hastelloy B2 exhibits:
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Outstanding resistance to hydrochloric acid at all concentrations and temperatures
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Excellent resistance to sulfuric, acetic, and phosphoric acids
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Superior resistance to hydrogen chloride gas
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Exceptional resistance to pitting, stress corrosion cracking, and crevice corrosion
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Resistance to knife-line and weld heat-affected zone attack
However, it should not be used in oxidizing environments or where oxidizing contaminants are present in reducing media, as this can lead to rapid corrosion and premature failure.
FAQs
1. What is Hastelloy B2?
Hastelloy B2 is a nickel-molybdenum alloy designed for exceptional resistance to reducing acids and aggressive chemical environments.
2. What are the mechanical properties of Hastelloy B2?
Hastelloy B2 offers high tensile strength (min 760 MPa), yield strength (min 350 MPa), and elongation (min 40%), making it suitable for demanding applications.
3. What industries use Hastelloy B2 Rod?
Industries such as chemical processing, pharmaceuticals, petrochemicals, and pollution control utilize Hastelloy B2 Rod for its superior corrosion resistance.
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