Materials for FORGED pistons

Cu-Aluminum Alloys for racing applications

AlCu2Mg1.5Ni

EN-AW: 2618A (EN 573-3: 2009   EN 485-2: 2008)
USA Japan France England Poland Rep. Ceca NASA
JIS AFNOR BS PN CSN
A92618 2618 2618A 2618A AlCu2Mg2Ni1 424218 RR58

Chemical composition in Pct (%)

Si Mg Cu Ni Fe Ti Mn Zn Zr+Ti Al
Min. 0,15 1,2 1,8 0,8 1,4 0,20 0,25 0,15 0,25 Fill
Max 0,25 1,8 2,7 1,4

Physical properties

 

Specific weight

2.76  gr/cm3

Lowest/Highest melting point

549° - 638°C

Specific heat (a/at 100°C)

0.23   cal/gr x °C


Thermal conductivity (a/at 20°C)

0.33   cal/sec x cm x °C

Modulus of elasticity (E)

74.400      N/mm2

Heat Treatment

T6

AlSi12.5MgCuNi

4032 (EN 573-3: 2009   EN 485-2: 2008)

Chemical composition in Pct (%)

Si Mg Cu Ni Fe Zn Cr Al
Min. 11,00 0,8 0,5 0,5 1,0 0,25 0,1 Fill
Max 13,50 1,3 1,3 1,3

Physical properties

 

Specific weight

2.7 gr/cm3

Lowest/Highest melting point

 >532°C 

Specific heat (a/at 100°C)

0.2065   cal/gr x °C


Thermal conductivity (a/at 20°C)

0.3705   cal/sec x cm x °C 

Modulus of elasticity (E)

79.000      N/mm2

Heat Treatment

T6