Stainless Steel HG10MNN
UNS J92604
HG-10MnN (J92604, ASTM A297/A743) is a manganese- and nitrogen-alloyed low-nickel heat-resistant cast stainless steel developed as a nickel-saving alternative to standard 18-8 heat-resistant castings.
Reference datasheet — HG10MNN is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the HT condition
HG10MNN tempers and conditions
HG10MNN is supplied in 3 conditions, soft to hard. HT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HTDefault Solution annealed | Standard supply condition for pressure/corrosion-service castings: maximum ductility, toughness and homogeneity of the Mn-N austenite. | 290 | 585 | 35 | 175 HB | — |
Stress relieved | Used for large or heavily welded/machined castings where distortion and residual stress must be minimised without losing austenite homogeneity. | 300 | 575 | 30 | 180 HB | 1.9 % IACS |
Spheroidize annealed | Choose for purely heat-resistant furnace hardware per A297 practice, where dendritic as-cast structure and slightly higher yield are acceptable. | 320 | 560 | 22 | 190 HB | — |
Supply forms, finishes and certifications
Ways HG10MNN is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CC | Centrifugally cast tube/ring, solution annealed | Surface finish |
What is HG10MNN?
HG-10MnN (J92604, ASTM A297/A743) is a manganese- and nitrogen-alloyed low-nickel heat-resistant cast stainless steel developed as a nickel-saving alternative to standard 18-8 heat-resistant castings. Supplied heat-treated, as-cast, stress-relieved or centrifugally cast, it provides 290 MPa yield, 585 MPa tensile, 35 % elongation and 175 HB (87 HRB) with service to 900 °C. Machinability (32), weldability (58) and corrosion resistance (58) are all modest, and high-Mn melts need nitrogen-controlled practice; HF is the nearest alternative when nickel content is not restricted. HG10MNN has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,370°C (2,498 °F). HG10MNN has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 190 GPa (27.6 Msi).
What is HG10MNN used for?
- Furnace fixtures and jigs
- Conveyor components for heat-treat lines
- Furnace trays and baskets
- Quench and load-handling frames
- Burner and duct support castings
- Centrifugally cast furnace rolls
Advantages
- Low embodied carbon — 3.4 kg CO₂/kg, better than 91% of stainless steel grades
- High service temperature — 900°C (1,652 °F), better than 85% of stainless steel grades
Limitations
- Limited formability — 15/100, worse than 91% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Low electrical conductivity — 1.9 % IACS, worse than 84% of stainless steel grades
HG10MNN properties
Typical room-temperature values for HG10MNN-HT; bars are the position among stainless steel grades.
Physical3
HG10MNN has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical14
HG10MNN has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
HG10MNN is rated for continuous service to 900°C (1,652 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), worse than 80% of stainless steel grades. Thermal expansion is 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
HG10MNN conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of HG10MNN takes about 48 MJ of energy and emits 3.4 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 75%.
Manufacturability7
HG10MNN's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability good (58/100); formability poor (15/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. HG10MNN is highlighted; hover a dot for its name, or open the interactive family chart.
Working with HG10MNN
Is HG10MNN easy to machine?
Machine like a nitrogen-strengthened austenitic: rigid setups, sharp positive-rake carbide, heavy feed and low speed to cut under the work-hardened skin, flood coolant.
Can HG10MNN be welded?
Weldable with GTAW/SMAW using over-alloyed austenitic filler (e.g. 309/E309Mo type); keep interpass low, no preheat, and re-solution-treat critical castings after major repair.
Can HG10MNN be formed, bent or molded?
Cast only — high-Mn melts need nitrogen-controlled melting, generous risering and fast pouring to avoid pinholes and hot tears; no cold forming.
HG10MNN chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C0.10 % max implied by the '10' in the ACI designation | ≤ 0.1 | 0.08 |
| Mnprincipal austenite stabiliser replacing Ni; verify against current standard revision | 8 – 11 | 9.5 |
| Siaids oxidation resistance and fluidity | 0.5 – 1.5 | 1 |
| Cr | 18 – 21 | 19.5 |
| Nireduced Ni is the point of the grade | 3.5 – 6 | 4.5 |
| Nsolid-solution strengthener and austenite stabiliser | 0.2 – 0.4 | 0.3 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Fe | balance |
What surface finishes work on HG10MNN?
Grit-blast and pickle/passivate in nitric-based solution after casting; can be ground and polished, but casting porosity limits mirror finishes and no anodising applies.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel HG10MNN in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92604
How much does HG10MNN cost?
HG10MNN is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
HG10MNN — frequently asked
What is HG10MNN used for?
HG10MNN is typically used for furnace fixtures and jigs, conveyor components for heat-treat lines, furnace trays and baskets, quench and load-handling frames, burner and duct support castings and centrifugally cast furnace rolls. In short: nickel-saving heat-resistant casting; mn-N strengthened austenitic; service to 900 °C.
What is the yield strength of HG10MNN?
HG10MNN has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 585 MPa (84.8 ksi) — weaker than 72% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is HG10MNN easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Machine like a nitrogen-strengthened austenitic: rigid setups, sharp positive-rake carbide, heavy feed and low speed to cut under the work-hardened skin, flood coolant.
Can HG10MNN be welded?
Yes — weldability is rated good (58/100). Weldable with GTAW/SMAW using over-alloyed austenitic filler (e.g. 309/E309Mo type); keep interpass low, no preheat, and re-solution-treat critical castings after major repair.
What surface finishes work on HG10MNN?
Grit-blast and pickle/passivate in nitric-based solution after casting; can be ground and polished, but casting porosity limits mirror finishes and no anodising applies.
Can HG10MNN be formed, bent or molded?
Cast only — high-Mn melts need nitrogen-controlled melting, generous risering and fast pouring to avoid pinholes and hot tears; no cold forming.
What is the maximum service temperature of HG10MNN?
HG10MNN is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between HG10MNN-HT and HG10MNN-AC?
HT is the default condition — standard supply condition for pressure/corrosion-service castings: maximum ductility, toughness and homogeneity of the Mn-N austenite. AC: choose for purely heat-resistant furnace hardware per A297 practice, where dendritic as-cast structure and slightly higher yield are acceptable. Yield strength is 290 MPa in HT versus 320 MPa in AC.
How much does HG10MNN cost?
HG10MNN is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A743/A743M Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM International (2021)
- ASTM A297/A297M Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application — ASTM International (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Cast Stainless Steels) — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.