Stainless Steel Discaloy vs PH14-8Mo
Stainless Steel · grade comparison
Stainless Steel Discaloy and PH14-8Mo are both stainless steel grades. Discaloy is the stronger of the two: yield strength 730 MPa (106 ksi) against 415 MPa (60.2 ksi) for PH14-8Mo, about 76% more; tensile strength follows at 1,000 MPa (145 ksi) vs 895 MPa (130 ksi). In exchange, PH14-8Mo is the more ductile: elongation 25% versus 20% for Discaloy, and Discaloy is harder (30 HRC vs 25 HRC). Discaloy runs hotter in service (650°C vs 400°C continuous) and PH14-8Mo conducts heat better (15.9 W/m·K vs 14 W/m·K). On the shop floor, PH14-8Mo machines more easily (fair vs poor) and PH14-8Mo welds better (good vs fair).
DiscaloyChoose it when strength drives the design, or when the part sees heat.
PH14-8MoChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Discaloy vs PH14-8Mo: 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
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Hardness, Rockwell B
Same in both: Fatigue Strength (Endurance Limit) 380 MPa55.1 ksi
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)
Max Service Temperature (continuous)
Latent Heat of Fusion
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 62 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Polishability
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 | Discaloy | PH14-8Mo |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 7 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Pickling, Plasma Spray, Silver Plating.
Discaloy vs PH14-8Mo — frequently asked
Is Discaloy stronger than PH14-8Mo?
Yes. Discaloy has a typical yield strength of 730 MPa (106 ksi) against 415 MPa (60.2 ksi) for PH14-8Mo — about 76% more. Tensile strength is 1,000 MPa (145 ksi) vs 895 MPa (130 ksi).
Which is cheaper, Discaloy or PH14-8Mo?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Discaloy or PH14-8Mo?
PH14-8Mo. Its machinability rates fair (40/100) against poor (18/100) for Discaloy; for welding the order is PH14-8Mo first (good, 60/100) then Discaloy (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Discaloy and PH14-8Mo 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.