ASTM Grade 65-45-15 Ductile Cast Iron
ASTM grade 65-45-15 is ductile cast iron in the as-fabricated (no temper or treatment) condition. It has the second highest ductility compared to the other variants of ductile cast iron. The graph bars on the material properties cards below compare ASTM grade 65-45-15 to: cast irons (top), all iron 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
180
Elastic (Young's, Tensile) Modulus
180 GPa 26 x 106 psi
Elongation at Break
17 %
Poisson's Ratio
0.29
Shear Modulus
70 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
500 MPa 73 x 103 psi
Tensile Strength: Yield (Proof)
350 MPa 51 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Maximum Temperature: Mechanical
290 °C 550 °F
Melting Completion (Liquidus)
1160 °C 2120 °F
Melting Onset (Solidus)
1120 °C 2050 °F
Specific Heat Capacity
490 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
36 W/m-K 21 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
1.9 % relative
Density
7.5 g/cm3 470 lb/ft3
Embodied Carbon
1.5 kg CO2/kg material
Embodied Energy
21 MJ/kg 8.9 x 103 BTU/lb
Embodied Water
43 L/kg 5.1 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
76 MJ/m3
Resilience: Unit (Modulus of Resilience)
350 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
9.8 mm2/s
Thermal Shock Resistance
18 points
Alloy Composition
| Fe | 93.7 to 95.5 | |
| C | 3.0 to 3.5 | |
| Si | 1.5 to 2.8 | |
| P | 0 to 0.080 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM A395: Standard Specification for Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures
Cast Iron: Physical and Engineering Properties, Harold T. Angus, 1976
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008