The vacuum-explosion welded transition joint called Triplate® is a high quality material for welding aluminium to steel.
Triplate® is an excellent alternative for Triclad®.

SMT (Shockwave Metalworking Technologies b.v.), the producer of Triplate®, is specialized in the manufacture of this 'high-tech' transition.
SMT is approved as a manufacturer of aluminium/steel joints by Lloyd's Register of Shipping, Det Norske Veritas, Germanischer Lloyd, Bureau Veritas, American Bureau of Shipping and RINA.
Triplate® is most often used in shipbuilding, as a transition joint for welding an aluminium superstructure to a steel hull.