Nickel Alloy Alloy 908-AW vs Alloy 908-CW
Nickel Alloy · Alloy 908 temper comparison
Alloy 908-AW and Alloy 908-CW are two conditions of the same nickel alloy grade, Alloy 908: AW (as-welded deposit) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Alloy 908-CW is the stronger of the two: yield strength 780 MPa (113 ksi) against 400 MPa (58 ksi) for Alloy 908-AW, about 95% more; tensile strength follows at 1,000 MPa (145 ksi) vs 760 MPa (110 ksi). In exchange, Alloy 908-AW is the more ductile: elongation 25% versus 15% for Alloy 908-CW, and Alloy 908-CW is harder (285 HB vs 205 HB). Alloy 908-AW runs hotter in service (550°C vs 500°C continuous).
Alloy 908-AWChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Alloy 908-CWChoose it when strength drives the design.
Alloy 908-AW vs Alloy 908-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.
Elastic (Young's) Modulus
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: Shear Modulus 62 GPa9 Msi · Bulk Modulus 148 GPa21.5 Msi · Poisson's Ratio 0.31 · Fracture Toughness (K_IC) 120 MPa·√m109 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 8.17 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F · Liquidus Temperature 1,390°C2,534 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 12 W/m·K6.9 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 7.7 µm/m·K4.3 µin/in·°F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.6 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 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: Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 185 MJ/kg79,536 BTU/lb · Embodied Carbon (primary production) 14 kg CO₂/kg · Embodied Water 220 L/kg26.4 gal/lb · Typical Recycled Content 25%
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.
Alloy 908-AW vs Alloy 908-CW — frequently asked
Is Alloy 908-CW stronger than Alloy 908-AW?
Yes. Alloy 908-CW has a typical yield strength of 780 MPa (113 ksi) against 400 MPa (58 ksi) for Alloy 908-AW — about 95% more. Tensile strength is 1,000 MPa (145 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, AW or CW?
SA is the default Alloy 908 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, Alloy 908-AW or Alloy 908-CW?
Alloy 908-AW. Its weldability rates good (55/100) against fair (50/100) for Alloy 908-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 908-AW and Alloy 908-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.