AACSR, Aluminium Alloy Conductors Steel Reinforced (IEC 61089)
Applications
Used as bare overhead transmission cable and as primary and secondary distribution cable. AACSR offers optimal strength for line design. Variable steel core stranding enables desired strength to be achieved without sacrificing ampacity.

Construction
AACSR is a concentrically stranded conductor composed of one or more layers of aluminum alloy wire stranded with a high-strength coated steel core. The core may be single wire or stranded depending on the size. 
The proportions of aluminum alloy and steel can be varied to obtain the relation between currentcarrying capacity and mechanical strength best suited to each application.
Core wire for AACSR is available with "aluminized" aluminum coated (AZ): or aluminum clad (AW).
Additional corrosion protection is available through the application of grease to the core or infusion of the complete cable with grease.