Aluminum boron alloy
Application
International standards for electrical conductivity (EC) grade aluminium specify a maximum resistivity of approx. 0.028 Ohm.mm²/m. Aluminium for such applications is treated with boron to neutralize the harmful effects of titanium, vanadium, chromium and zirconium on the electrical conductivity.
The electrical conductivity of aluminum can be dramatically improved by the addition of tightly controlled amounts of boron to eliminate the undesirable effects of chromium, titanium, vanadium, and zirconium. Aluminum boron master alloys in the form of waffle, bar, or continuous feeding rod provide a convenient mechanism for making the desired boron addition. Boron has also been acknowledged as an effective grain refiner for aluminum silicon alloys. Master alloys of AlB12 and AlB2 phase morphology dependent on boron concentration. AlB12 particles are large and settle quicker while AlB2 particles are smaller and are less likely to produce sludge buildup in the furnace. Both types of particles react immediately when introduced into molten aluminum and form borides of Cr, Ti, V, and Zr.
Composition
| Metal Grade | Chemical Composition (%) | ||||||
| Si | Fe | Cu | Ti | B | Impurities | Al | |
| AlB1 | 0.2 | 0.3 | 0.1 | - | 0.50-1.5 | 0.15 | the balance |
| AlB3 | 0.2 | 0.35 | 0.1 | - | 2.5-3.5 | 0.1 | the balance |
| AlB4 | 0.2 | 0.25 | - | 0.03 | 3.5-4.5 | 0.1 | the balance |
| AlB5 | 0.2 | 0.3 | - | 0.05 | 4.5-5.5 | 0.1 | the balance |
Package
1000KGS/Pallet packaged with plastic film
