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ACI-ASTM CF10SMnN (J92972) Cast Stainless Steel

ACI-ASTM CF10SMnN steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the heat treated (HT) condition. CF10SMnN is the designation in both the ACI and ASTM systems for this material. J92972 is the UNS number.

It has a very low base cost among cast austenitic stainless steels. In addition, it has a fairly high tensile strength and a fairly low embodied energy.

The graph bars on the material properties cards below compare ACI-ASTM CF10SMnN 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

190 GPa 28 x 106 psi

Elongation at Break

34 %

Fatigue Strength

260 MPa 38 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

75 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

660 MPa 95 x 103 psi

Tensile Strength: Yield (Proof)

330 MPa 48 x 103 psi

Thermal Properties

Latent Heat of Fusion

340 J/g

Maximum Temperature: Corrosion

410 °C 770 °F

Maximum Temperature: Mechanical

900 °C 1650 °F

Melting Completion (Liquidus)

1360 °C 2470 °F

Melting Onset (Solidus)

1310 °C 2400 °F

Specific Heat Capacity

500 J/kg-K 0.12 BTU/lb-°F

Thermal Expansion

16 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

15 % relative

Density

7.5 g/cm3 470 lb/ft3

Embodied Carbon

3.1 kg CO2/kg material

Embodied Energy

45 MJ/kg 19 x 103 BTU/lb

Embodied Water

150 L/kg 18 gal/lb

Common Calculations

PREN (Pitting Resistance)

19

Resilience: Ultimate (Unit Rupture Work)

180 MJ/m3

Resilience: Unit (Modulus of Resilience)

280 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

26 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

22 points

Thermal Shock Resistance

15 points

Alloy Composition

Among cast stainless steels, the composition of ACI-ASTM CF10SMnN steel is notable for containing comparatively high amounts of manganese (Mn) and silicon (Si). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Silicon content is typically governed by metallurgical processing concerns, but it can also be added for the purpose of improving oxidation resistance.

Iron (Fe) 59.1 to 65.4
Chromium (Cr) 16 to 18
Nickel (Ni) 8.0 to 9.0
Manganese (Mn) 7.0 to 9.0
Silicon (Si) 3.5 to 4.5
Nitrogen (N) 0.080 to 0.18
Carbon (C) 0 to 0.1
Phosphorus (P) 0 to 0.060
Sulfur (S) 0 to 0.030

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015