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351 SupraCast™ T6

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Description

SupraCast™ Alloys are optimized to meet the challenging future powertrain requirements by eliminating conventional aluminum alloy barriers. Castability, good thermal conductivity, high tensile strength and fatigue resistance at both low and high temperatures.

Properties

Electrical

Electrical conductivity σel

1.86E+7 - 2.09E+7 S/m at 20 °C

General

Density ρ

2.7 g/cm³ at 20 °C

Mechanical

Elastic modulus E

72 - 74 GPa at 20 °C

Elongation A

2 - 3 % at 20 °C

Fatigue strength SNf

95 MPa at 150 °C

measured after 10⁷ cycles, R = 1

Show chart

Tensile strength Rm

370 - 400 MPa at 20 °C

Yield strength YS

280 - 350 MPa at 20 °C

Thermal

Coefficient of thermal expansion α

2.06E-5 - 2.86E-5 1/K at 20 °C

measured from 20-300°C

Melting point Tm

510 - 595 °C

Thermal conductivity λ

140 - 160 W/(m·K) at 20 °C

Chemical properties

Element

Weight %

Comment

Al

-

balance

Si

8 - 10 %

Cu

1.35 - 2.1 %

Mg

0.25 - 0.55 %

Mn

0.08 - 0.6 %

More

Technological properties

Application areas

Cylinder heads, connecting rods, turbo chargers, brake calipers, impellers

Corrosion properties

Corrosion Resistance (ASTM G110): Similar corrosion resistance as A359 alloy (the additions of Cu do not change the corrosion mode nor increase the depth of attack of the alloys)

General machinability

Very good machinability

Processing history

Temper: T6

Processing methods

Very good castability, suitable for sand casting and permanent mold casting

Welding

Good weldability

This material data has been provided by Alcoa.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.