Aluminum, A357.0, investment cast, T6

A357.0 Aluminum Alloy (T6 Condition, Investment Cast) is a high-strength, lightweight aluminum-silicon-magnesium alloy widely used in the automotive and industrial sectors. Known for its excellent castability and corrosion resistance, this alloy is commonly employed in critical applications such as space frames, wheels, axle and differential housings, intake manifolds, and electronic enclosures. Its T6 condition—solution heat-treated and artificially aged—enhances mechanical properties, providing high tensile strength, good fatigue resistance, and superior thermal conductivity. A357.0 is also well-suited for welding, making it an ideal choice for precision-engineered components requiring durability and performance under demanding conditions.

Aluminum A357.0 investment cast T6 General Information

PropertyValue
DesignationA357.0 (Aluminum Association)
ConditionT6 (Solution heat-treated and artificially aged)
UNS NumberA13570
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Typical Uses

Application
Automotive industry: space frames, wheels, axle and differential housings
Pump, meter, differential housings, intake manifolds
Electronic cases, fuel pumps
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Composition Overview

ElementMin (%)Max (%)
Aluminum (Al)9193
Silicon (Si)6.57.5
Magnesium (Mg)0.40.7
Titanium (Ti)0.040.2
Beryllium (Be)0.040.07
Copper (Cu)00.2
Iron (Fe)00.2
Manganese (Mn)00.1
Zinc (Zn)00.1
Other00.15
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Physical Properties

PropertyValue
Density2.65e3 – 2.71e3 kg/m³
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Mechanical Properties

PropertyMinMaxUnit
Young’s Modulus70.673.4GPa
Specific Stiffness26.327.4MN·m/kg
Yield Strength (Elastic Limit)229254MPa
Tensile Strength291322MPa
Specific Strength85.394.8kN·m/kg
Elongation3.34% strain
Compressive Strength229254MPa
Flexural Modulus70.673.4GPa
Flexural Strength (Modulus of Rupture)236247MPa
Shear Modulus26.427.8GPa
Bulk Modulus66.175.5GPa
Poisson’s Ratio0.3220.338–
Shape Factor27–
Hardness (Vickers)96110HV
Elastic Stored Energy365448kJ/m³
Fatigue Strength at 10⁷ Cycles95.998.1MPa
Fatigue Strength Model (Stress Range)87.8107MPa
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Impact & Fracture Properties

PropertyMinMaxUnit
Fracture Toughness23.627.6MPa·m⁰.⁵
Toughness (G)7.7710.5kJ/m²
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Thermal Properties

PropertyMinMaxUnit
Melting Point549626°C
Maximum Service Temperature130150°C
Minimum Service Temperature-273–°C
Thermal Conductivity150160W/m·°C
Specific Heat Capacity944982J/kg·°C
Thermal Expansion Coefficient21.322.1µstrain/°C
Thermal Shock Resistance146164°C
Thermal Distortion Resistance6.887.39MW/m
Latent Heat of Fusion384393kJ/kg
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Electrical Properties

PropertyMinMaxUnit
Electrical Resistivity3.75.8µΩ·cm
Electrical Conductivity29.746.6% IACS
Galvanic Potential-0.76-0.68V
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Magnetic Properties

PropertyValue
Magnetic TypeNon-magnetic
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Optical, Aesthetic, and Acoustic Properties

PropertyMinMaxUnit
TransparencyOpaque–
Acoustic Velocity5.13e35.24e3m/s
Mechanical Loss Coefficient (Tan Delta)0.03640.0402–
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Critical Materials Risk

PropertyValue
Contains >5wt% Critical Elements?Yes
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Processing Properties

ProcessSuitability
Metal CastingExcellent
Metal Cold FormingUnsuitable
Metal Hot FormingUnsuitable
Metal Press FormingUnsuitable
Metal Deep DrawingUnsuitable
Machining Speed91.4 m/min
WeldabilityExcellent
NotesPreheating is not required, post-weld heat treatment is required, contains hazardous elements
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Durability

EnvironmentSuitability
Water (Fresh)Excellent
Water (Salt)Acceptable
Weak AcidsExcellent
Strong AcidsExcellent
Weak AlkalisAcceptable
Strong AlkalisUnacceptable
Organic SolventsExcellent
Oxidation at 500°CUnacceptable
UV Radiation (Sunlight)Excellent
Galling Resistance (Adhesive Wear)Limited Use
NotesAluminum alloys perform poorly when self-mated but can be processed without galling when mated with steels.
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Flammability

PropertyValue
FlammabilityNon-flammable
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Corrosion Resistance

TypeSusceptibility
Stress Corrosion CrackingSusceptible
NoteRated in chloride; other susceptible environments: halide, water
Aluminum, A357.0, investment cast, T6

Aluminum A357.0 investment cast T6 Standards with Similar Compositions

CountryStandards
USAA13570 to SAE J452, A357.0, A357.0 to ASTM B108, A357.0 to ASTM B686, A357.0 to MIL A-21180C, A357.2, A357.2 to QQ A-371F, C357.0, UNS A13570, UNS A13572, UNS A33570
Trade NamesA357, ALCOTEC R-A357.0, ROLLE MA-356
Aluminum, A357.0, investment cast, T6
Aluminum, 357.0, sand cast, T6 | General Information

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