Hastelloy B-3
Hastelloy® B-3® is a nickel-molybdenum alloy with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also withstands sulfuric, acetic, formic and phosphoric acids, and other nonoxidizing media. B-3 alloy has a special chemistry designed to achieve greater thermal stability than B-2 alloy, resulting in easier fabrication.
Because this alloy contains no significant chromium addition it should NOT be used in oxidizing media or in presence of oxidizing salts, such as ferric or cupric salts. The latter may form when iron or copper is present in a system containing hydrochloric acid. Likewise alloy B-3 does not withstand wet chlorine gas or hypochlorite bleach.
Chemistry
| Ni | Cr | Mo | Mn | Cu | Si | C | S | P | Ti | Al | Co | Nb | V | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 65.0 | 1.0 | 27.0 | — | — | — | — | — | — | — | — | — | — | — | 1.0 |
| MAX | — | 3.0 | 32.0 | 1.0 | 0.2 | 0.1 | 0.01 | 0.01 | 0.03 | 0.2 | 0.5 | 3.0 | 0.2 | 0.2 | 3.0 |
Specifications
ASME SB 333
ASME SB 335
ASME SB 619, ASME SB 619 Class I or II, ASME SB 622, ASME SB 626, ASME SB-366
ASTM B 333, ASTM B 335, ASTM B 366, ASTM B 472, ASTM B 619, ASTM B 619 Class I or III, ASTM B 622, ASTM B 626
UNS N10675
Features
• Resists hydrochloric acid at all concentrations and temperatures • Withstands wet HCl gas, sulfuric, acetic and phosphoric acids • Excellent resistance to pitting and to stress corrosion cracking
Applications
• Acetic acid production, initial phase in presence of iodide catalyst • Methyl methacrylate production with hot 98 % H2SO4 • Production of herbicides, insecticides, ethylene glycol, ethyl benzene
Physical Properties
Density: 0.333 lb/inch3
Melting Point: 2500-2585°F
Electrical Resistivity: 651 Ohm – circ mil/ft
| Temperature,°F | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | 5.7 | 6.1 | 6.3 | 6.5 | 6.6 | 6.5 | 7.1 | 7.6 |
| Modulus of Elasticity Dynamic, psi x 10-6 | 30.9 | 30.1 | 29.3 | 28.3 | 27.2 | 26.5 | 24.9 | 23.3 |
* 70°F to indicated temperature.
Mechanical Properties
Average Tensile Data, Sheet*
| Temperature,°F | 70 | 200 | 400 | 600 | 800 | 1000 |
| Ultimate Tensile Strength, ksi | 125.0 | 120.7 | 110.0 | 104.4 | 102.0 | 97.8 |
| 0.2% Yield Strength, ksi | 60.6 | 55.3 | 47.0 | 43.5 | 42.4 | 39.0 |
| Elongation, % | 53.4 | 56.9 | 59.7 | 63.4 | 62.0 | 59.0 |
* Limited data for 0.125″ bright annealed sheet