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HYPEREUTECTIC ALUMINUM SILICON 
AMC® 4632 ALLOY

Materion’s AMC 4632 aluminum silicon alloy is a high quality hypereutectic aluminum silicon material. This alloy is manufactured by a powder metallurgy method that refines the microstructure and provides enhanced mechanical properties.

ADVANTAGES OF MATERION AMC® 4632 ALLOY

Our aluminum silicon AMC 4632 alloy can be used as a replacement for conventional aluminum alloys such as AA4032 and AA2618 for pistons and in a range of other applications. When using this alloy to replace existing materials it can help with weight reduction and improve stability at elevated temperatures. AMC 4632 alloy may be machined to a fine surface finish and tolerances using high-speed techniques. This aluminum silicon alloy can be used in automotive applications and for aerospace components. 

AMC 4632 alloy has a lower coefficient of thermal expansion, allowing designs to have tighter tolerances. It offers a high tensile modulus (approximately 19% higher than aluminum alloy AA4032), good strength and excellent fatigue resistance at ambient and elevated temperatures.


COMPARING PROPERTIES OF AMC® 4632 ALLOY & ALUMINUM 2618

Property AMC 4632 2618* Difference
Product Form Forged Forged
Temper T6 T61
Rp0.2 MPa (ksi) 380 (55) 370 (54) +3%
Rm MPa (ksi) 430 (62) 440 (64) -2%
Elastic Modulus GPa (msi) 94 (13.6) 75 (10.4) +25%
Elongation % 2 10 -80%
Density g/cm³ (lb/in³) 2.7 (0.097) 2.75 (0.099) -2%
Thermal Conductivity W/m/K 127 146 -13%
Thermal Expansion ppm/K 16.1 22 -27%
Vickers Hardness Hv10kg 180 140 +29%

*Aluminum 2618 data from MatWeb

COMPARING PROPERTIES OF AMC® 4632 Alloy & ALUMINUM 4032

Property AMC 4632 4032** Difference
Product Form Forged Forged
Temper T6 T6
Rp0.2 MPa (ksi) 380 (55) 315 (46) +21%
Rm MPa (ksi) 430 (62) 380 (55) +13%
Elastic Modulus GPa (msi) 94 (13.6) 77 (11.4) +19%
Elongation % 2 9 -78%
Density g/cm³ (lb/in³) 2.7 (0.097) 2.68 (0.097) +1%
Thermal Conductivity W/m/K 127 138 -13%
Thermal Expansion ppm/K 16.1 20.2 -20%
Vickers Hardness Hv10kg 180 137 +31%

**Aluminum 4032 data from MatWeb

LEARN MORE ABOUT ALLOY AMC® 4632 ALLOY

Talk with our engineers to see if aluminum silicon alloy AMC 4632 alloy can add strength to your application.