Alloy B-2
UNS N10665
Description
Alloy B-2 is a solid-solution strengthened nickel-molybdenum alloy with significantly lower carbon, silicon and iron to reduce weld zone corrosion in the as-welded condition when compared to the Alloy B. Molybdenum is the primary alloying element which makes Alloy B-2 with significant resistance to reducing environments such as hydrogen chloride gas, sulfuric acid, acetic acid and phosphoric acid, and resistance to pure sulfuric acid and a number of non-oxidizing acids. Alloy B-2 is suitable for various chemical process applications in its welded form, and is suitable for extreme reducing conditions. However, Alloy B-2 should not be used in oxidizing media and the high temperatures condition of 1000 °F to 1600 °F.
Chemical Component
| Ni | Mo | Cr | Co | Fe | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|
| Remainder | 26.0-30.0% | 1.00% max | 1.00% max | 2.00% max | 2.00% max | 1.00% max | 0.10% max | 0.040% max | 0.030% max |
Basic Information
| Items | Alloy B-2 |
|---|---|
| Catalog | ACMA-Ni-A019 |
| Density | 9.22 g/cm3 |
| Specific Heat Capacity | 377 J/kg.°C |
| Electrical Resistivity | 1.37 µΩ.m |
| Modulus of Elasticity | 217 x 103 MPa |
| Melting Range | 1332-1382 °C |
Material Forms
Alfa Chemistry offers Alloy B-2 in a variety of forms, including
- Bar
- Sheet & Plate
- Seamless Pipe
- Tube
- Welded Tube
- Welded Pipe
Mechanical Properties
| Ultimate Tensile | Yield Strength (0.2% OS) | Elong. |
|---|---|---|
| 110 ksi (760 MPa) | 151 ksi (350 MPa) | 40% |
Specifications
Bar: ASTM B335, B564; ASME SB335, SB5641; DIN 17752, ISO 9723
Plate & Sheet: ASTM B333; ASME SB333; DIN 17750, ISO 6208
Welded Pipe: ASTM B619, B775; ASME SB619, SB775; DIN 17751
Seamless Pipe & Tube: ASTM B622; ASME SB622; DIN 17751, ISO 9722
Welded Tube: ASTM B626; ASME SB626; DIN 17751
Applications
Alloy B-2 is suitable for use in the chemical processing industry and typical end use applications include:
- Pressure vessels and reactors
- Agitators and mixers
- Pumps and valves
- Gaskets
- Pipe work and pipe spools
- Heat exchangers
- Mechanical seals
- Rupture discs
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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