ASTM Grade HC (28Cr, J92605) Cast Stainless Steel
ASTM grade HC steel is a ferritic stainless steel formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. HC is the ASTM designation for this material. J92605 is the UNS number. And 28Cr is the common industry name.
It has the lowest ductility among the cast ferritic stainless steels in the database.
The graph bars on the material properties cards below compare ASTM grade HC steel to: cast ferritic 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
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
6.0 %
Fatigue Strength
96 MPa 14 x 103 psi
Poisson's Ratio
0.27
Shear Modulus
80 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
430 MPa 62 x 103 psi
Tensile Strength: Yield (Proof)
200 MPa 28 x 103 psi
Thermal Properties
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
460 °C 850 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1410 °C 2580 °F
Melting Onset (Solidus)
1370 °C 2500 °F
Specific Heat Capacity
490 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
17 W/m-K 9.8 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
14 % relative
Density
7.6 g/cm3 480 lb/ft3
Embodied Carbon
2.8 kg CO2/kg material
Embodied Energy
40 MJ/kg 17 x 103 BTU/lb
Embodied Water
170 L/kg 20 gal/lb
Common Calculations
PREN (Pitting Resistance)
29
Resilience: Ultimate (Unit Rupture Work)
21 MJ/m3
Resilience: Unit (Modulus of Resilience)
95 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
26 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
16 points
Thermal Diffusivity
4.5 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
Among cast stainless steels, the composition of ASTM grade HC steel is notable for containing a comparatively high amount of chromium (Cr). Chromium is the defining alloying element of stainless steel. Higher chromium content imparts additional corrosion resistance.
| Fe | 61.9 to 74 | |
| Cr | 26 to 30 | |
| Ni | 0 to 4.0 | |
| Si | 0 to 2.0 | |
| Mn | 0 to 1.0 | |
| C | 0 to 0.5 | |
| Mo | 0 to 0.5 | |
| P | 0 to 0.040 | |
| S | 0 to 0.040 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM A297: Standard Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat 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
Corrosion of Stainless Steels, A. John Sedriks, 1996
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015