Nickel Alloy NiCo20Cr20MoTi-ST vs NiCo20Cr20MoTi ST+A
Nickel Alloy · NiCo20Cr20MoTi temper comparison
NiCo20Cr20MoTi-ST and NiCo20Cr20MoTi ST+A are two conditions of the same nickel alloy grade, NiCo20Cr20MoTi: ST (solution annealed) versus ST+A (solution treated 1150 °C + aged 800 °C/8 h, air cooled). The chemistry is identical, so every difference below comes from the condition. NiCo20Cr20MoTi ST+A is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 540 MPa (78.3 ksi) for NiCo20Cr20MoTi-ST, about 15% more; tensile strength follows at 1,060 MPa (154 ksi) vs 880 MPa (128 ksi). In exchange, NiCo20Cr20MoTi-ST is the more ductile: elongation 42% versus 25% for NiCo20Cr20MoTi ST+A, and NiCo20Cr20MoTi ST+A is harder (300 HB vs 190 HB). On the shop floor, NiCo20Cr20MoTi-ST welds better (very good vs fair).
NiCo20Cr20MoTi-STChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
NiCo20Cr20MoTi ST+AChoose it when strength drives the design.
NiCo20Cr20MoTi-ST vs NiCo20Cr20MoTi ST+A: 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.
NiCo20Cr20MoTi-STNiCo20Cr20MoTi ST+A
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 221 GPa32.1 Msi · Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 184 GPa26.7 Msi · Poisson's Ratio 0.3 · Shear Strength 560 MPa81.2 ksi · Hardness, Rockwell B 92 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.36 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,300°C2,372 °F · Liquidus Temperature 1,355°C2,471 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 11.7 W/m·K6.8 BTU/hr·ft·°F · Specific Heat Capacity 461 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 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 1.5 % IACS · Electrical Resistivity 1.15×10⁻⁶ Ω·m45.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V · Corrosion Resistance 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 12% · Castability 35 / 100 · Brazeability / Solderability 60 / 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) 17 kg CO₂/kg · Embodied Water 500 L/kg59.9 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.
NiCo20Cr20MoTi-ST vs NiCo20Cr20MoTi ST+A — frequently asked
Is NiCo20Cr20MoTi ST+A stronger than NiCo20Cr20MoTi-ST?
Yes. NiCo20Cr20MoTi ST+A has a typical yield strength of 620 MPa (89.9 ksi) against 540 MPa (78.3 ksi) for NiCo20Cr20MoTi-ST — about 15% more. Tensile strength is 1,060 MPa (154 ksi) vs 880 MPa (128 ksi).
Which condition does FabDigit quote by default, ST or ST+A?
ST is the default NiCo20Cr20MoTi condition in the FabDigit quote flow. 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.
Which is easier to machine, NiCo20Cr20MoTi-ST or NiCo20Cr20MoTi ST+A?
NiCo20Cr20MoTi-ST. Its machinability rates poor (20/100) against not recommended (14/100) for NiCo20Cr20MoTi ST+A; for welding the order is NiCo20Cr20MoTi-ST first (very good, 75/100) then NiCo20Cr20MoTi ST+A (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in NiCo20Cr20MoTi-ST and NiCo20Cr20MoTi ST+A 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.