Steel 1J85 vs Supermalloy
Steel · grade comparison
Steel 1J85 and Supermalloy are both steel grades. 1J85 is the stronger of the two: yield strength 250 MPa (36.3 ksi) against 230 MPa (33.4 ksi) for Supermalloy, about 9% more; tensile strength follows at 600 MPa (87 ksi) vs 560 MPa (81.2 ksi). Supermalloy runs hotter in service (400°C vs 200°C continuous). On the shop floor, Supermalloy welds better (good vs fair).
1J85Choose it when strength drives the design.
SupermalloyChoose it when the part sees heat, or when it will be welded.
1J85 vs Supermalloy: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Charpy V-Notch Impact (RT)
Same in both: Bulk Modulus 175 GPa25.4 Msi · Poisson's Ratio 0.31 · Elongation at Break 40% · Fatigue Strength (Endurance Limit) 250 MPa36.3 ksi · Hardness, Brinell 115 HB · Hardness, Rockwell B 65 HRB · Hardness, Vickers 120 HV
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 19 W/m·K11 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.5 µm/m·K6.9 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Brazeability / Solderability
Castability
Same in both: Machinability Rating (AISI 1212 = 100 %) 25% · Formability (cold) 85 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 25%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 4.7 mm²/s
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 1J85 | Supermalloy |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
1J85 vs Supermalloy — frequently asked
Is 1J85 stronger than Supermalloy?
Yes. 1J85 has a typical yield strength of 250 MPa (36.3 ksi) against 230 MPa (33.4 ksi) for Supermalloy — about 9% more. Tensile strength is 600 MPa (87 ksi) vs 560 MPa (81.2 ksi).
Which is cheaper, 1J85 or Supermalloy?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, 1J85 or Supermalloy?
Supermalloy. Its weldability rates good (60/100) against fair (50/100) for 1J85.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1J85 and Supermalloy side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.