ASTM A436 Type 6 (F41007) Cast Iron
ASTM A436 type 6 is a type of austenitic grey cast iron. Cited properties are appropriate for the stress relieved condition. ASTM A436 Type 6 is the ASTM designation for this material. F41007 is the UNS number. The graph bars on the material properties cards below compare ASTM A436 type 6 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
150
Elastic (Young's, Tensile) Modulus
180 GPa 26 x 106 psi
Poisson's Ratio
0.3
Shear Modulus
70 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
200 MPa 28 x 103 psi
Thermal Properties
Latent Heat of Fusion
290 J/g
Melting Completion (Liquidus)
1380 °C 2520 °F
Melting Onset (Solidus)
1340 °C 2440 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Expansion
14 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
17 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
3.6 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
100 L/kg 12 gal/lb
Common Calculations
PREN (Pitting Resistance)
3.2
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
6.9 points
Strength to Weight: Bending
9.5 points
Thermal Shock Resistance
5.6 points
Alloy Composition
| Fe | 62.4 to 75.5 | |
| Ni | 18 to 22 | |
| Cu | 3.5 to 5.5 | |
| Si | 1.5 to 2.5 | |
| C | 0 to 3.0 | |
| Cr | 1.0 to 2.0 | |
| Mn | 0.5 to 1.5 | |
| Mo | 0 to 1.0 | |
| S | 0 to 0.12 |
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