Hastelloy B3
Hastelloy B3 is a nickel molybdenum corrosion resistant alloy with about 65% nickel, 27% to 32% molybdenum, ≤3% iron, and ≤1.5% chromium. It resists strongly reducing media such as hydrochloric, sulfuric, and phosphoric acid, together with organic acids, chloride solutions, and non oxidizing salts. The source lists continuous service at about 1000℃, stable mechanical properties, good formability, and resistance to stress corrosion cracking and pitting. Uses include reactors, evaporators, agitators, transfer piping, acid gas equipment, and containers for strongly corrosive media.
Product details
Chemical composition
| HastelloyB3 | C | Si | Mn | P | S | Ni | Cr | Mo | Fe | W | V | Co | Cu | Ti | Nb | Zr | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | – | – | – | – | – | 65.0 | 1.0 | 27.0 | 1.0 | – | – | – | – | – | – | – | – |
| max | 0.01 | 0.1 | 3.0 | 0.03 | 0.01 | – | 3.0 | 32.0 | 3.0 | 3.0 | 0.2 | 3 | 0.2 | 0.2 | 0.2 | 0.1 | 0.5 |
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Grade equivalents
| UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|
| N10675 | 2.4600 Nimofer 6929 | – | NS323 NS3203 | 65Ni-29.5Mo-2Fe-2Cr |
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Physical properties
| Density g/cm³ | 9.22 |
|---|---|
| Melting range ℃ | 1370-1418 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 11.2 |
| Specific heat J/kg•℃ | 373 |
| Elastic modulus GPa | 216 |
| Shear modulus GPa | 83 |
| Electrical resistivity μΩ•m | 1.37 |
| Linear expansion coefficient a/10-6℃-1 | 10.6(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 | 170-220 |
| *After solution heat treatment | |
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Applications
- Pulp and paper equipment, including digesters and bleaching vessels
- Scrubbers, reheaters, and wet-gas fans in flue gas desulfurization (FGD) systems
- Equipment and components operating in sour-gas environments
- Reactors for acetic acid and other acidic products
- Sulfuric acid condensers
- Methylene diphenyl diisocyanate (MDI) service
- Production and processing of impure phosphoric acid
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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