Austenitic Nodular Cast Iron (Ductile Ni-Resist)
Austenitic nodular cast iron is a cast iron. It can have the highest base cost among cast irons. In addition, it can have the highest ductility and the highest embodied energy.
The properties of austenitic nodular cast iron include twelve 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 austenitic nodular cast iron 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
140 to 240
Elastic (Young's, Tensile) Modulus
180 to 190 GPa 26 to 27 x 106 psi
Elongation at Break
6.8 to 34 %
Poisson's Ratio
0.29 to 0.3
Shear Modulus
70 to 72 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
430 to 500 MPa 62 to 73 x 103 psi
Tensile Strength: Yield (Proof)
190 to 240 MPa 28 to 35 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 to 350 J/g
Melting Completion (Liquidus)
1340 to 1400 °C 2440 to 2550 °F
Melting Onset (Solidus)
1300 to 1360 °C 2370 to 2470 °F
Specific Heat Capacity
470 to 490 J/kg-K 0.11 to 0.12 BTU/lb-°F
Thermal Expansion
13 to 14 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
16 to 25 % relative
Density
7.7 to 8.0 g/cm3 480 to 500 lb/ft3
Embodied Carbon
3.5 to 4.9 kg CO2/kg material
Embodied Energy
48 to 68 MJ/kg 21 to 29 x 103 BTU/lb
Embodied Water
91 to 120 L/kg 11 to 15 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
24 to 140 MJ/m3
Resilience: Unit (Modulus of Resilience)
98 to 160 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 to 25 points
Strength to Weight: Axial
15 to 18 points
Strength to Weight: Bending
16 to 18 points
Thermal Shock Resistance
12 to 15 points
Followup Questions
Further Reading
ASTM A571: Standard Specification for Austenitic Ductile Iron Castings for Pressure-Containing Parts Suitable for Low-Temperature Service
ASTM A439: Standard Specification for Austenitic Ductile Iron Castings
ISO 2892: Austenitic Cast Irons - Classification
Cast Iron: Physical and Engineering Properties, Harold T. Angus, 1976
Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008