Nickel Alloy Hastelloy S-AW vs Hastelloy S-CW
Nickel Alloy · Hastelloy S temper comparison
Hastelloy S-AW and Hastelloy S-CW are two conditions of the same nickel alloy grade, Hastelloy S: AW (as-welded deposit) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Hastelloy S-CW is the stronger of the two: yield strength 1,100 MPa (160 ksi) against 480 MPa (69.6 ksi) for Hastelloy S-AW, about 129% more; tensile strength follows at 1,275 MPa (185 ksi) vs 830 MPa (120 ksi). In exchange, Hastelloy S-AW is the more ductile: elongation 35% versus 8% for Hastelloy S-CW, and Hastelloy S-CW is harder (340 HB vs 205 HB). Hastelloy S-AW runs hotter in service (1,000°C vs 480°C continuous). On the shop floor, Hastelloy S-AW welds better (excellent vs good).
Hastelloy S-AWChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Hastelloy S-CWChoose it when strength drives the design.
Hastelloy S-AW vs Hastelloy S-CW: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 212 GPa30.7 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 186 GPa27 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 8.76 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,335°C2,435 °F · Liquidus Temperature 1,380°C2,516 °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 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.6 µm/m·K6.4 µin/in·°F · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.26×10⁻⁶ Ω·m49.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 35 / 100 · Brazeability / Solderability 80 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 40%
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.
Hastelloy S-AW vs Hastelloy S-CW — frequently asked
Is Hastelloy S-CW stronger than Hastelloy S-AW?
Yes. Hastelloy S-CW has a typical yield strength of 1,100 MPa (160 ksi) against 480 MPa (69.6 ksi) for Hastelloy S-AW — about 129% more. Tensile strength is 1,275 MPa (185 ksi) vs 830 MPa (120 ksi).
Which condition does FabDigit quote by default, AW or CW?
SA is the default Hastelloy S condition in the FabDigit quote flow (neither AW nor CW). 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 welds better, Hastelloy S-AW or Hastelloy S-CW?
Hastelloy S-AW. Its weldability rates excellent (85/100) against good (60/100) for Hastelloy S-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hastelloy S-AW and Hastelloy S-CW 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.