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Abstract

An aluminum-base alloy contains components at the following ratio of the same, in mass %: copper 0.5-2.0; manganese 0.3-1.6; zirconium 0.1-0.5; boron 0.02-0.15; silver 0.01-0.5; scandium 0.02-0.15; iron 0.01-0.3; silicon 0.01-0.35; inevitable admixtures 0-0.1 each one of them with 0-0.03, the remnant being aluminum. At the same time, boron, zirconium and scandium are present as nanoparticles AlB₂, AlB₁₂ borides and Al₃(ZrSc) with an average size of no more than 50 nm to provide electric conductivity of at least 55% IACS, the ultimate strength (σ_β) after exposure to 250° C. for 400 hours being at least 170 MPa. The alloy shows increased thermostability and electric conductivity and is foreseen for items operating under elevated temperatures.

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First Claim