Home Products Composites | Compounds | Ceramics Metal Matrix Composites Metal Matrix Composites Aluminum-Beryllium AlBeCast® - Investment Casting Alloys THE AlBeCast® PRODUCT LINE Materion offers customers a wide range of high performance materials, including our AlBeCast® aluminum–beryllium alloys for investment cast products. AlBeCast materials provide designers with several advantages in fabrication. Casting is a near net-shape process, that requires less alloy than conventional machining. In addition, the time needed for machining cast parts is reduced. The combination of reduced material and fabrication costs can be substantial. Property AlBeCast® 910 AlBeCast® 920 Aluminum A357-T6 Titanium 6AL-4V AlSiC F3A205-T6 Density g/cm3 (lb/in3) 2.17 (0.078) 2.18 (0.078) 2.69 (0.097) 4.43 (0.160) 2.69 (0.097) CTE @ 25oC ppm/oC (ppm/oF) 14.6 (8.1) 14.2 (7.9) 21.5 (11.9) 9.3 (5.2) 16.4 (9.1) Modulus GPa (Msi) 193 (28) 202 (29.3) 72 (10.5) 110 (16) 72 (10.5) Yield Strength, MPa (ksi) 165 (24) 220 (32) 248 (36) 880 (128) 165 (24) Ultimate Tensile Strength, MPa (ksi) 211 (31) 269 (39) 317 (46) 950 (138) 196 (28) The AlBeCast process meets standard cast aluminum design guidelines and requires minimal design changes. The casting process utilizes the same equipment as aluminum castings, minimizing the need for unique equipment. The only unique features of the AlBeCast operation is the use of vacuum casting rather than the more traditional air melt casting process. AlBeCast® 910 AlBeCast 910 is a ternary beryllium aluminum nickel alloy developed and patented by Materion. It has a relatively high specific modulus, good ductility and reasonably good strength. The addition of nickel reduces the thermal expansion coefficient, increases tensile properties and improves castability. AlBeCast® 920 AlBeCast 920 alloy is equivalent to AMS 7918. This is an aluminum-beryllium alloy containing silver, cobalt and germanium. The silver and cobalt are added to increase the strength, while germanium is added for improved castability. AlBeCast 920 has a higher specific strength than AlBeCast 910; however, AlBeCast 920’s ductility is lower and its cost is higher and more variable.