Hastelloy B2
Hastelloy B2 is a nickel based corrosion resistant alloy containing about 65% nickel and 26% to 30% molybdenum, with carbon limited to ≤0.01%. Its single phase austenitic structure provides resistance to reducing acids, including hydrochloric and sulfuric acid, and to sulfur bearing media. The source states stable mechanical performance from -196℃ to 400℃. Typical equipment includes reactors, evaporators, piping, and agitators handling hydrochloric acid, sulfuric acid, or formic acid. B2 is less resistant to oxidizing media such as nitric acid, so material selection must follow the service environment.
Product details
Chemical composition
| HastelloyB2 | C | Si | Mn | P | S | Fe | Ni | Cr | Mo | Co |
|---|---|---|---|---|---|---|---|---|---|---|
| min | – | – | – | – | – | – | – | – | 26.0 | – |
| max | 0.02 | 0.1 | 1.0 | 0.04 | 0.03 | 2.0 | Bal | 1.0 | 30.0 | 1.0 |
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Grade equivalents
| UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|
| N10665 | 2.4617 Nimofer 6928 | NW0665 | NS322 NS3202 | NiMo28 65Ni-28Mo-2Fe |
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Physical properties
| Density g/cm³ | 9.2 |
|---|---|
| Melting range ℃ | 1330~1380 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 11.1 |
| Specific heat J/kg•℃ | 407 |
| Elastic modulus GPa | 208 |
| Electrical resistivity μΩ•m | 1.25 |
| Linear expansion coefficient a/10-6℃-1 | 10.3 (20~100℃) |
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Mechanical properties
| Tensile strength Rm N/mm | ≥690 |
|---|---|
| Yield strength RP0.2 N/mm | ≥ 310 |
| Elongation % | ≥30 |
| Hardness HB | 210-250 HB |
| *After solution heat treatment | |
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Applications
- Hydrochloric acid synthesis reactors, sulfuric acid concentration evaporators, and acetic acid distillation columns
- Desulfurization equipment and naphtha distillation columns for processing sulfur-bearing crude oil
- Waste-incineration flue gas desulfurization units requiring resistance to chloride corrosion
- Pharmaceutical synthesis reactors operating in strong-acid environments
- Acid-pickling solution heating coils for metal surface treatment
- Absorber tower linings in wet flue gas desulfurization systems at coal-fired power plants
- External corrosion-protection layers for subsea oil pipelines requiring resistance to hydrogen sulfide
Available product forms
- Round Bar
- Wire
- Forgings
- Plate
- Strip
- Seamless Pipe
- Welded Pipe
- Capillary Tube
- Flanges
- Pipe Fittings
- Non-standard Custom Parts
Values follow the Milike materials catalogue and are provided for preliminary review. Confirm the applicable purchase specification, heat treatment condition, and inspection requirements before final material selection.
- Heat and batch traceability
- PMI testing available
- Cut-to-size processing
- Material certificates on request
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