295.0 (C4A, A02950) Cast Aluminum
295.0 aluminum is an aluminum alloy formulated for casting. 295.0 is the Aluminum Association (AA) designation for this material. A02950 is the UNS number. Additionally, the SAE designation is 38. And the British Standard (BS) designation is LM11. Older literature may refer to this material as ASTM C4A, but this is now discouraged.
The properties of 295.0 aluminum include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 295.0 aluminum to: ANSI/AA cast aluminums (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
60 to 93
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
2.0 to 7.2 %
Fatigue Strength
44 to 55 MPa 6.4 to 8.0 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Shear Strength
180 to 230 MPa 26 to 33 x 103 psi
Tensile Strength: Ultimate (UTS)
230 to 280 MPa 33 to 41 x 103 psi
Tensile Strength: Yield (Proof)
100 to 220 MPa 15 to 32 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
530 °C 990 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
880 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
140 W/m-K 82 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
35 % IACS
Electrical Conductivity: Equal Weight (Specific)
100 % IACS
Otherwise Unclassified Properties
Base Metal Price
10 % relative
Density
3.0 g/cm3 190 lb/ft3
Embodied Carbon
7.9 kg CO2/kg material
Embodied Energy
150 MJ/kg 64 x 103 BTU/lb
Embodied Water
1140 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
5.2 to 13 MJ/m3
Resilience: Unit (Modulus of Resilience)
77 to 340 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
46 points
Strength to Weight: Axial
21 to 26 points
Strength to Weight: Bending
27 to 32 points
Thermal Diffusivity
54 mm2/s
Thermal Shock Resistance
9.8 to 12 points
Alloy Composition
Among cast aluminum alloys, the composition of 295.0 aluminum is notable for containing a comparatively high amount of copper (Cu). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.
| Al | 91.4 to 95.3 | |
| Cu | 4.0 to 5.0 | |
| Si | 0.7 to 1.5 | |
| Fe | 0 to 1.0 | |
| Mn | 0 to 0.35 | |
| Zn | 0 to 0.35 | |
| Ti | 0 to 0.25 | |
| Mg | 0 to 0.030 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings
ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993