ACI-ASTM CK35MN Cast Stainless Steel
ACI-ASTM CK35MN steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the heat treated (HT) condition.
It has a moderately low thermal conductivity among cast austenitic stainless steels. In addition, it has a fairly high tensile strength and a moderately high ductility.
The graph bars on the material properties cards below compare ACI-ASTM CK35MN steel to: cast austenitic stainless steels (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
190
Elastic (Young's, Tensile) Modulus
210 GPa 30 x 106 psi
Elongation at Break
40 %
Fatigue Strength
270 MPa 39 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
81 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
650 MPa 94 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
440 °C 820 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1460 °C 2650 °F
Melting Onset (Solidus)
1410 °C 2570 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
12 W/m-K 7.2 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.1 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.0 g/cm3 500 lb/ft3
Embodied Carbon
5.9 kg CO2/kg material
Embodied Energy
81 MJ/kg 35 x 103 BTU/lb
Embodied Water
210 L/kg 25 gal/lb
Common Calculations
PREN (Pitting Resistance)
48
Resilience: Ultimate (Unit Rupture Work)
210 MJ/m3
Resilience: Unit (Modulus of Resilience)
240 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
3.3 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
Among cast stainless steels, the composition of ACI-ASTM CK35MN steel is notable for containing comparatively high amounts of molybdenum (Mo) and nickel (Ni). Molybdenum is used to facilitate tempering. In addition, it offers modest bonuses to a wide range of material properties. Nickel is primarily used to achieve a specific microstructure. In addition, it has a beneficial effect on mechanical properties and certain types of corrosion.
| Fe | 43.4 to 51.8 | |
| Cr | 22 to 24 | |
| Ni | 20 to 22 | |
| Mo | 6.0 to 6.8 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 1.0 | |
| N | 0.21 to 0.32 | |
| Cu | 0 to 0.4 | |
| C | 0 to 0.035 | |
| P | 0 to 0.035 | |
| S | 0 to 0.020 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A743: Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005
Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002
Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010