LM25 datasheet
Aluminium Casting Alloy
(Al-Si7Mg0.5)

Chemical Composition
  Min Max
Copper   0.20
Magnesium 0.2 0.6
Silicon 6.5 7.5
Iron   0.5
Manganese   0.3
Nickel   0.1
Zinc   0.1
Lead   0.1
Tin   0.05
Titanium 0.10 0.20
Heat Treatment-TF Condition (fully heat treated)
Heat to a temperature of 525ºC – 545ºC for between 4 to 12 hours, then quench in hot water or polymer, finally artificially age at 155ºC – 175ºC for 8 to 12 hours and air cool.
Mechanical Properties
0.2% Proof Stress (N/mm²) 200-250  
Tensile Stress (N/mm²) 230-280  
Elongation (%) 0  
Brinell Hardness 90-110