Technical Specifications

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Aluminium

Rigid Polyurethane

All values are typical.
Other polyurethane compounds available to produce variations in these characteristics.

Chemical Composition of Aluminium Alloys

All as % LM6 LM25
Copper 0.1 0.20
Magnesium 0.10 0.20 - 0.6
Silicon 10.0 - 13.0 6.5 - 7.5
Iron 0.6 0.5
Manganese 0.5 0.3
Nickel 0.1 0.1
Zinc 0.1 0.1
Lead 0.1 0.1
Tin 0.05 0.05
Titanium 0.2 0.2
     
Aluminium Remainder Remainder
Others each 0.05 0.05
Others Total 0.15 0.15

 

Mechanical Properties

  LM6 (Sand Cast) LM6 (Die Cast)
0.2% Proof Stress (N/mm²) 60-70 120
Tensile Stress (N/mm²) 160-190 280
Elongation (%) 5 2 - 5
Impact Resistance Izod (Nm) 6.0 -
Brinell Hardness 50-55 55-60
Endurance Limit (5x108 cycles N/mm2) 51 70-100
Modulus of Elasticity (x10³N/mm²) 71 71
  LM25 - M (Sand Cast) LM25 -TE (Die Cast) LM25 - TE (Sand Cast)
0.2% Proof Stress (N/mm²) 80-100 120-150 130-200
Tensile Stress (N/mm²) 130-150 150*-180 190*-250
Elongation (%) 2 1* 2*
Brinell Hardness 55-65 70-75 75-90
Endurance Limit (5x108 cycles N/mm2) 70-100 55 80-110
Modulus of Elasticity (x10³N/mm²) 71 71 71
  LM25 - TB7 (Sand Cast) LM25 - TF (Die Cast) LM25 - TF (Sand Cast)
0.2% Proof Stress (N/mm²) 80-110 200-250 220-260
Tensile Stress (N/mm²) 160* 230-280 280-320
Elongation (%) 2.5* - 2*
Brinell Hardness 65-75 90-110 90-110
Endurance Limit (5x108 cycles N/mm2) 70-100 60 95
Modulus of Elasticity (x10³N/mm²) 71 71 71

All values for sand cast are typical. Die cast are from 6mm dia. bars. Minimum values *

Physical Properties

  LM6 LM25
Coefficient of Thermal Expansion (per °C at 20 - 100°C) 0.00 00 20 0.00 00 20
Thermal Conductivity (cal/cm²/cm/°C at 25°C) 0.34 0.36
Electrical Conductivity (% copper strand at 20°C) 37 39
Density (g/cm³) 2.65 2.68
Freezing Range (°C approx.) 575-565 615-550