Nickel Alloy Waspaloy-STA vs Waspaloy STA-HS
Nickel Alloy · Waspaloy temper comparison
Waspaloy-STA and Waspaloy STA-HS are two conditions of the same nickel alloy grade, Waspaloy: STA (solution treated and aged) versus STA-HS (high solution 1080 °C + stabilize 845 °C/4 h + age 760 °C/16 h). The chemistry is identical, so every difference below comes from the condition. Waspaloy-STA is the stronger of the two: yield strength 900 MPa (131 ksi) against 830 MPa (120 ksi) for Waspaloy STA-HS, about 8% more; tensile strength follows at 1,350 MPa (196 ksi) vs 1,280 MPa (186 ksi). Waspaloy-STA is harder — 340 HB against 320 HB for Waspaloy STA-HS — which matters for wear surfaces and threads. Waspaloy STA-HS runs hotter in service (815°C vs 705°C continuous). On the shop floor, Waspaloy STA-HS forms better (fair vs not recommended).
Waspaloy-STAChoose it when strength drives the design, or when surface hardness matters.
Waspaloy STA-HSChoose it when the part sees heat.
Waspaloy-STA vs Waspaloy STA-HS: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel alloy 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 nickel alloy 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 211 GPa30.6 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 176 GPa25.5 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.19 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F · Liquidus Temperature 1,360°C2,480 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 10.7 W/m·K6.2 BTU/hr·ft·°F · Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.2 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.24×10⁻⁶ Ω·m48.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 74 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 12 / 100 · Weldability 20 / 100 · Castability 40 / 100 · Brazeability / Solderability 50 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 235 MJ/kg101,032 BTU/lb · Embodied Carbon (primary production) 15.5 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Waspaloy-STA vs Waspaloy STA-HS — frequently asked
Is Waspaloy-STA stronger than Waspaloy STA-HS?
Yes. Waspaloy-STA has a typical yield strength of 900 MPa (131 ksi) against 830 MPa (120 ksi) for Waspaloy STA-HS — about 8% more. Tensile strength is 1,350 MPa (196 ksi) vs 1,280 MPa (186 ksi).
Which condition does FabDigit quote by default, STA or STA-HS?
Solution Annealed is the default Waspaloy condition in the FabDigit quote flow (neither STA nor STA-HS). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose Waspaloy-STA over Waspaloy STA-HS?
Pick Waspaloy-STA when strength drives the design, or when surface hardness matters. Pick Waspaloy STA-HS when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Waspaloy-STA and Waspaloy STA-HS 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.