This Nickel-Molybdenum alloy gives excellent resistance to hydrochloric acid at all concentrations and temperatures from ambient to high. It also withstands sulphuric, acetic, formic and phosphoric acids and other non oxidizing media. B-3 also has excellent resistance to pitting corrosion and to stress-corrosion cracking. Hastelloy B-3 is not recommended in the presence of ferric or cupric salts.
| Element | Min % | Max % |
| Ni | 65.00 | – |
| Cr | 1.00 | 3.00 |
| Mo | 27.00 | 32.00 |
| Fe | 1.00 | 3.00 |
| W | – | 3.00 |
| C | – | 0.01 |
| Si | – | 0.10 |
| Co | – | 3.00 |
| Mn | – | 3.00 |
| V | – | 0.20 |
| P | – | 0.03 |
| S | – | 0.01 |
| Ti | – | 0.20 |
| Cu | – | 0.20 |
| Al | – | 0.50 |
| Zr | – | 0.10 |
| Nb/Cb | – | 0.20 |
| Ta | – | 0.20 |
| Ni+Mo | 94.00 | 98.00 |
Density
9.22 g/cm³ | 0.333 lb/in³
Melting Point
1418°C | 2585°F
Coefficient of Expansion
10.6 μm/m °C (20 – 100°C) | 5.7 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity
83 kN/mm² | 12038 ksi
Modulus of Elasticity
216 kN/mm² | 31329 ksi
Heat Treatment of Finished Parts
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed or Spring Temper | Stress Relieve | 400 – 450 | 750 – 840 | 2 | Air |
Properties
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 1000 – 1200 | 145 – 174 | -200 to +400 | -330 to +750 |
| Spring Temper | 1600 – 2000 | 232 – 290 | -200 to +400 | -330 to +750 |