LM169 datasheet
Aluminium Casting Alloy
(Al-Si7Mg0.6)

Chemical Composition
  Min Max
Copper   0.10
Magnesium 0.5 0.75
Silicon 6.5 7.5
Iron 0.15 0.20
Manganese   0.10
Nickel   0.05
Zinc   0.10
Lead   0.05
Tin   0.05
Titanium 0.10 0.20
Beryllium   0.07
Heat Treatment
Heat to a temperature of 535°C – 545°C, for not less than 10 hours, then quench in water or polymer not hotter than 30°C, finally artificially age at 155°C – 165°C for not less than 2 hours and air cool.
Mechanical Properties
0.2% Proof Stress (N/mm²) 240  
Tensile Stress (N/mm²) 290  
Elongation (%) 3  
Brinell Hardness 80