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 |
Grade equivalents
| UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|
| N10675 | 2.4600 Nimofer 6929 | – | NS323 NS3203 | 65Ni-29.5Mo-2Fe-2Cr |
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℃) |
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 | |
Available product forms
- Round Bar
- Plate
- Pipe & Tube
- Welding Consumables
- Flanges
- Hex Bolts
- Threaded Rod
- Nuts & Washers
Technical values are transcribed and translated from the supplied Milike Chinese catalogue. Confirm the applicable purchase specification, heat treatment condition, and inspection requirements before final material selection.
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