242.0 (CN42A, A02420) Cast Aluminum
Cast Aluminum Alloys
annealed
Property Overview
Density3.1g/cm³
Elastic Modulus73GPa
Tensile Strength180MPa
Yield Strength120MPa
Brinell Hardness70HB
Maximum Service Temperature210°C
Chemical Composition
CR
0 to 0.25%
NI
1.7 to 2.3%
MN
0 to 0.35%
SI
0 to 0.7%
CU
3.5 to 4.5%
TI
0 to 0.25%
AL
88.4 to 93.6%
MG
1.2 to 1.8%
RES.
Residuals res. | | 0 to 0.15%
RESIDUALS RES.
0 to 0.15%
ZN
0 to 0.35%
FE
0 to 1.0%
Mechanical
Elastic (Young's, Tensile) Modulus
73 GPa
Elongation at Break
1.0 %
Fatigue Strength
110 MPa
Poisson's Ratio
0.33
Shear Modulus
27 GPa
Tensile Strength: Ultimate (UTS)
180 MPa
Tensile Strength: Yield (Proof)
120 MPa
Hardness
Brinell Hardness
70
Physical
Density
3.1 g/cm 3
Thermal
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
210 °C
Melting Completion (Liquidus)
640 °C
Melting Onset (Solidus)
530 °C
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
870 J/kg-K
Thermal Conductivity
170 W/m-K
Thermal Diffusivity
62 mm 2 /s
Thermal Expansion
22 µm/m-K
Thermal Shock Resistance
8.0 points
Electrical
Electrical Conductivity: Equal Volume
44 % IACS
Electrical Conductivity: Equal Weight (Specific)
130 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
1.6 MJ/m 3
Resilience: Unit (Modulus of Resilience)
110 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
45 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
23 points
Environmental
Base Metal Price
12 % relative
Embodied Carbon
8.3 kg CO 2 /kg material
Embodied Energy
150 MJ/kg
Embodied Energy
150 MJ/kg 64 x 10 3 BTU/lb
Embodied Water
1130 L/kg
Embodied Water
1130 L/kg 130 gal/lb
Physical Other
Calomel Potential
-650 mV
Registered Designations & Aliases
242.0 (CN42A, A02420) Cast AluminumA02420CN42A
Standards
ASTM B108 ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings
ASTM B26 ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
ASTM B618 ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings
ASTM B618 ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002 Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993