In Alclad 2024-T4, the core material is heat treated aluminum alloy and the surface material is what?

In Alclad 2024-T4, the core material is heat treated aluminum alloy and the surface material is what?

• A. heat-treated aluminum alloy
• B. commercially pure aluminum
• C. strain-hardened aluminum alloy
• D. aluminum oxide coating

Answer: (B)

Alclad construction uses a slim shell of corrosion-resistant aluminum on the outside of a stronger core alloy. For 2024-T4, the core is a heat-treated aluminum alloy (the strong, age-hardenable 2000-series material). The surface layer, which coats both sides, is commercially pure aluminum. This outer layer provides excellent corrosion resistance and easy formability without adding strength, since it isn’t heat-treated in the same way as the core. In short, the surface material is commercially pure aluminum because the clad layer is meant to protect the core from corrosion rather than contribute to strength. The other options don’t fit because the exterior isn’t another heat-treated alloy, nor a strain-hardened alloy, nor an oxide coating.

Alclad construction uses a slim shell of corrosion-resistant aluminum on the outside of a stronger core alloy. For 2024-T4, the core is a heat-treated aluminum alloy (the strong, age-hardenable 2000-series material). The surface layer, which coats both sides, is commercially pure aluminum. This outer layer provides excellent corrosion resistance and easy formability without adding strength, since it isn’t heat-treated in the same way as the core. In short, the surface material is commercially pure aluminum because the clad layer is meant to protect the core from corrosion rather than contribute to strength.

The other options don’t fit because the exterior isn’t another heat-treated alloy, nor a strain-hardened alloy, nor an oxide coating.