LM119 (RR350) datasheet
Aluminium Casting Alloy

Chemical Composition
  Min Max
Copper 4.5 5.50
Magnesium   0.10
Silicon   0.30
Iron   0.50
Manganese 0.2 0.30
Nickel 1.3 1.70
Zinc   0.10
Titanium 0.15 0.25
Zirconnium 0.10 0.30
Cobalt 0.10 0.30
Antimony 0.10 0.30
Others: Each   0.05
Others: Total   0.15
Aluminium   Remainder
Heat Treatment
Heat to a temperature of 535°C – 545°C for not less than 5 hours, then quench in boiling water or in oil at a temperature of 80°C or in a polymer quenchant not hotter than 30°C, subsequently artificially age by heating at for 12-16 hours and air cool.
Mechanical Properties
0.2% Proof Stress (N/mm²) 190  
Tensile Stress (N/mm²) 215  
Elongation (%) 1  
Brinell Hardness 85  
Strength at elevated temperatures
After a long term duration at temperature e.g.1000 hours, the tensile strength of castings may be expected to be largely maintained at temperature up to 250°C, and to fall to about 90 N/mm², at 350°C.