Stainless Steel Custom 450 vs Discaloy
Stainless Steel · grade comparison
Stainless Steel Custom 450 and Discaloy are both stainless steel grades. Custom 450 is the stronger of the two: yield strength 1,205 MPa (175 ksi) against 730 MPa (106 ksi) for Discaloy, about 65% more; tensile strength follows at 1,310 MPa (190 ksi) vs 1,000 MPa (145 ksi). In exchange, Discaloy is the more ductile: elongation 20% versus 14% for Custom 450, and Custom 450 is harder (390 HB vs 290 HB). Discaloy runs hotter in service (650°C vs 400°C continuous) and Custom 450 conducts heat better (15.9 W/m·K vs 14 W/m·K). On the shop floor, Custom 450 machines more easily (28 vs 18 out of 100), Custom 450 welds better (good vs fair), and Custom 450 sits in a lower cost tier (premium, $$$) than Discaloy (high, $$$$).
Custom 450Choose it when strength drives the design, or when the part is machined in volume.
DiscaloyChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Custom 450 vs Discaloy: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Castability
Same in both: Brazeability / Solderability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Custom 450 | Discaloy |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | H900 | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | 0.8 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| AlCrN | Yes | — |
| AlTiN | Yes | — |
| Black Oxide | Yes | — |
| CVD Al2O3 | Yes | — |
| CVD TiCN | Yes | — |
| CVD TiN | Yes | — |
| Cerakote | Yes | — |
| Chrome Plating | Yes | — |
| CrN | Yes | — |
| DLC | Yes | — |
| Electropolishing | Yes | — |
| HVOF Coating | Yes | — |
| MoS2 | Yes | — |
| Multilayer CVD | Yes | — |
| Nickel Plating | Yes | — |
| PTFE Coating | Yes | — |
| Painting | Yes | — |
| Passivation (Stainless Steel) | Yes | — |
They share 7 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Pickling, Plasma Spray, Silver Plating.
Custom 450 vs Discaloy — frequently asked
Is Custom 450 stronger than Discaloy?
Yes. Custom 450 has a typical yield strength of 1,205 MPa (175 ksi) against 730 MPa (106 ksi) for Discaloy — about 65% more. Tensile strength is 1,310 MPa (190 ksi) vs 1,000 MPa (145 ksi).
Which is cheaper, Custom 450 or Discaloy?
Custom 450 is the lower-cost material: it sits in the premium tier ($$$) while Discaloy is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Custom 450 or Discaloy?
Custom 450, by a small margin. Both rate poor for machinability — 28/100 against 18/100 for Discaloy; for welding the order is Custom 450 first (good, 60/100) then Discaloy (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Custom 450 and Discaloy 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.