ASTM Grade HG10 MNN (19Cr-12Ni-4Mn, J92604) Cast Stainless Steel
ASTM grade HG10 MNN steel is an austenitic stainless steel formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. HG10 MNN is the ASTM designation for this material. J92604 is the UNS number. And 19Cr-12Ni-4Mn is the common industry name.
It has a moderately high electrical conductivity and a moderately high tensile strength among cast austenitic stainless steels.
The graph bars on the material properties cards below compare ASTM grade HG10 MNN 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
170
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
23 %
Fatigue Strength
170 MPa 25 x 103 psi
Poisson's Ratio
0.28
Shear Modulus
77 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
590 MPa 86 x 103 psi
Tensile Strength: Yield (Proof)
250 MPa 37 x 103 psi
Thermal Properties
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
500 °C 940 °F
Maximum Temperature: Mechanical
990 °C 1810 °F
Melting Completion (Liquidus)
1420 °C 2580 °F
Melting Onset (Solidus)
1370 °C 2500 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.5 BTU/h-ft-°F
Thermal Expansion
16 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
21 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
4.0 kg CO2/kg material
Embodied Energy
58 MJ/kg 25 x 103 BTU/lb
Embodied Water
160 L/kg 19 gal/lb
Common Calculations
PREN (Pitting Resistance)
25
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
160 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
3.9 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
Among cast stainless steels, the composition of ASTM grade HG10 MNN steel is notable for containing a comparatively high amount of manganese (Mn) and including niobium (Nb). Manganese is used to improve ductility at elevated temperatures. It also permits a higher nitrogen content than would otherwise be possible. Niobium is primarily used to improve yield strength, particularly at elevated temperatures.
| Fe | 57.9 to 66.5 | |
| Cr | 18.5 to 20.5 | |
| Ni | 11.5 to 13.5 | |
| Mn | 3.0 to 5.0 | |
| Nb | 0.2 to 1.0 | |
| Si | 0 to 0.7 | |
| Mo | 0.25 to 0.45 | |
| N | 0.2 to 0.3 | |
| Cu | 0 to 0.5 | |
| C | 0.070 to 0.11 | |
| P | 0 to 0.040 | |
| S | 0 to 0.030 |
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
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