LM6 is a casting alloy from the British BS 1490 series. It contains roughly 10-13% silicon, close to the eutectic composition, with copper, iron and zinc held to low levels. This gives very good fluidity, low shrinkage, good pressure tightness and better corrosion resistance than copper-bearing alloys like ADC12. It is normally used in the as-cast condition.
Why it matters when buying
- Low copper is the defining feature, so check Cu and Fe on the spectro report; scrap-based heats can drift high.
- Ask whether the ingot is sodium or strontium modified, or plan to add an AlSr master alloy yourself for a finer eutectic structure.
- Agree the reference standard (BS 1490 LM6 or an equivalent IS grade) in the RFQ.
- Typical supply is notched ingot; confirm weight per piece and packing.
Typical uses
Thin-walled and complex sand, gravity and pressure die castings, marine and outdoor fittings, pump bodies, manifolds, cookware and electrical parts where corrosion resistance matters. For higher strength after heat treatment, buyers move to LM25 or A356. Read choosing an alloy for die casting for selection tips.