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ACI-ASTM CF16F (J92701) Cast Stainless Steel

ACI-ASTM CF16F steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the heat treated (HT) condition. CF16F is the designation in both the ACI and ASTM systems for this material. J92701 is the UNS number.

It has a fairly high ductility among cast austenitic stainless steels. In addition, it has a moderately high thermal conductivity and a moderately low embodied energy.

The graph bars on the material properties cards below compare ACI-ASTM CF16F 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

150

Elastic (Young's, Tensile) Modulus

200 GPa 29 x 106 psi

Elongation at Break

50 %

Fatigue Strength

270 MPa 39 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

530 MPa 77 x 103 psi

Tensile Strength: Yield (Proof)

280 MPa 40 x 103 psi

Thermal Properties

Latent Heat of Fusion

300 J/g

Maximum Temperature: Corrosion

420 °C 790 °F

Maximum Temperature: Mechanical

980 °C 1800 °F

Melting Completion (Liquidus)

1420 °C 2590 °F

Melting Onset (Solidus)

1400 °C 2550 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

16 W/m-K 9.3 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

18 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

47 MJ/kg 20 x 103 BTU/lb

Embodied Water

150 L/kg 18 gal/lb

Common Calculations

PREN (Pitting Resistance)

22

Resilience: Ultimate (Unit Rupture Work)

220 MJ/m3

Resilience: Unit (Modulus of Resilience)

190 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

4.3 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among cast stainless steels, the composition of ACI-ASTM CF16F steel is notable for including selenium (Se). Selenium is used to improve machinability.

Iron (Fe) 61.3 to 72.8
Chromium (Cr) 18 to 21
Nickel (Ni) 9.0 to 12
Silicon (Si) 0 to 2.0
Manganese (Mn) 0 to 1.5
Molybdenum (Mo) 0 to 1.5
Selenium (Se) 0.2 to 0.35
Phosphorus (P) 0 to 0.17
Carbon (C) 0 to 0.16
Sulfur (S) 0 to 0.040

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 of Stainless Steels, Erich Folkhard et al., 2012

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