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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.

Iron (Fe) 57.9 to 66.5
Chromium (Cr) 18.5 to 20.5
Nickel (Ni) 11.5 to 13.5
Manganese (Mn) 3.0 to 5.0
Niobium (Nb) 0.2 to 1.0
Silicon (Si) 0 to 0.7
Molybdenum (Mo) 0.25 to 0.45
Nitrogen (N) 0.2 to 0.3
Copper (Cu) 0 to 0.5
Carbon (C) 0.070 to 0.11
Phosphorus (P) 0 to 0.040
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 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