ASTM A436 Type 5 (F41006) Cast Iron
ASTM A436 type 5 is a type of austenitic grey cast iron. Cited properties are appropriate for the stress relieved condition. ASTM A436 Type 5 is the ASTM designation for this material. F41006 is the UNS number. Additionally, the AFNOR (French) designation is FGL Ni35.
It has the lowest strength and highest ductility compared to the other variants of austenitic grey cast iron.
The graph bars on the material properties cards below compare ASTM A436 type 5 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
110
Elastic (Young's, Tensile) Modulus
180 GPa 27 x 106 psi
Elongation at Break
20 %
Poisson's Ratio
0.3
Shear Modulus
70 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
150 MPa 22 x 103 psi
Tensile Strength: Yield (Proof)
84 MPa 12 x 103 psi
Thermal Properties
Latent Heat of Fusion
280 J/g
Melting Completion (Liquidus)
1390 °C 2540 °F
Melting Onset (Solidus)
1350 °C 2460 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
13 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
24 % relative
Density
8.1 g/cm3 500 lb/ft3
Embodied Carbon
4.7 kg CO2/kg material
Embodied Energy
65 MJ/kg 28 x 103 BTU/lb
Embodied Water
110 L/kg 13 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
26 MJ/m3
Resilience: Unit (Modulus of Resilience)
19 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
5.3 points
Strength to Weight: Bending
7.9 points
Thermal Shock Resistance
4.5 points
Alloy Composition
| Fe | 57.4 to 64.5 | |
| Ni | 34 to 36 | |
| Si | 1.0 to 2.0 | |
| C | 0 to 2.4 | |
| Mn | 0.5 to 1.5 | |
| Cu | 0 to 0.5 | |
| S | 0 to 0.12 | |
| Cr | 0 to 0.1 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A436: Standard Specification for Austenitic Gray Iron Castings
Cast Iron: Physical and Engineering Properties, Harold T. Angus, 1976
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015