🛡️ Overview: What Are Hastelloy B2 Bars?
Hastelloy B2 is a wrought nickel-molybdenum alloy that can be used in the ‘as welded’ condition. This alloy has excellent resistance to all temperatures and concentrations of hydrochloric acid. Additionally, it has good stress corrosion cracking and pitting resistance as well. However, due to the presence of high molybdenum content, this alloy is premium-grade.
Hastelloy B2 bars are high-performance nickel-molybdenum alloy bars known for their exceptional resistance to corrosion, especially in reducing environments. They offer superior resistance to hydrochloric acid, sulfuric acid, and other aggressive chemicals. These bars are widely used in chemical processing, pharmaceutical, and oil and gas industries for their reliability in harsh conditions.
🏗️ Industrial Application
Hastelloy B2 bars boast excellent machinability characteristics when compared with other nickel-based alloys, enabling precise shaping and customization for manufacturing processes that demand specific dimensions.
- Chemical Processing: Used in reactors, heat exchangers, and vessels exposed to acids.
- Pharmaceuticals: Ideal for equipment involved with chemical synthesis and purification.
- Oil & Gas: Utilized for downhole equipment like valves and piping systems in harsh environments.
- Pulp & Paper: Components exposed to acidic or corrosive chemicals during production.
📊 Technical Specifications & Equivalent Grades
| STANDARD |
WERKSTOFF NR. |
UNS |
| Hastelloy B2 |
2.4617 |
N10665 |
Mechanical Properties
| Density |
Melting Point |
Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
| 9.2g/cm3 |
1370℃ (2550°℉) |
Psi-1,15,000, MPa-760 |
Psi- 52,000, MPa-350 |
40% |
Chemical Composition (%)
| Grade |
Ni |
Mo |
Cr |
Fe |
Mn |
C |
P |
S |
Si |
| Hastelloy B2 |
Bal |
26-30 |
1.0 |
- |
0.1 |
0.02 |
0.04 |
0.03 |
0.1 |
📏 Sizes & Dimensions
| Type |
SIZES (mm) |
SIZES (Inches) |
ISO Tolerance |
| Cold Drawn and Polish |
3.00 - 75.00 |
1/8 - 3.00 |
h8-h9-h10-h11 |
| Cold Drawn and Ground |
10.00 - 75.00 |
5/6 - 2.50 |
h8-h9-h10-h11 |
| Peeled and Polished |
40.00 - 150.00 |
1.50 - 6.00 |
h11, h11-DIN 1013 |
| Peeled and Ground |
20.00 - 50.00 |
3/4 - 2.00 |
h9-h10-h11 |
| Feature |
Details |
| Grade |
Hastelloy Round Bar / Rod / Square / Hex / Flat |
| Surface Finish |
Bright, Hot Rolled Pickled, Cold Drawn, Polished, Hairline |
| Condition |
Hardened & tempered, annealed |
| Processing |
Bar cutting to 650mm |
Frequently Asked Questions
Q1: What is the primary advantage of Hastelloy B2 bars?
Hastelloy B2 offers significant resistance to reducing environments, particularly hydrochloric acid at all concentrations and temperatures.
Q2: In which industries are Hastelloy B2 Rods most commonly used?
They are essential in chemical processing, pharmaceutical manufacturing, oil and gas production, and the pulp and paper industry.
Q3: Can Hastelloy B2 be used in the "as-welded" condition?
Yes, it is a wrought nickel-molybdenum alloy designed to be used in the as-welded condition while maintaining excellent corrosion resistance.
Q4: What are the equivalent grades for Hastelloy B2?
The common equivalent grades are UNS N10665 and Werkstoff Nr. 2.4617.
Q5: What sizes are available for Hastelloy B2 Round Bars?
Sizes range from 3.00mm to 800mm in diameter, available in various forms like cold drawn, peeled, polished, and ground.
Q6: Does Hastelloy B2 resist pitting and stress corrosion?
Yes, it provides excellent resistance to both pitting and stress corrosion cracking in aggressive chemical environments.
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