Nickel Alloy Hastelloy G-ANN vs Hastelloy G-CW
Nickel Alloy · Hastelloy G temper comparison
Hastelloy G-ANN and Hastelloy G-CW are two conditions of the same nickel alloy grade, Hastelloy G: ANN (annealed) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Hastelloy G-CW is the stronger of the two: yield strength 750 MPa (109 ksi) against 310 MPa (45 ksi) for Hastelloy G-ANN, about 142% more; tensile strength follows at 950 MPa (138 ksi) vs 690 MPa (100 ksi). In exchange, Hastelloy G-ANN is the more ductile: elongation 55% versus 15% for Hastelloy G-CW, and Hastelloy G-CW is harder (290 HB vs 180 HB). Hastelloy G-ANN runs hotter in service (550°C vs 400°C continuous). On the shop floor, Hastelloy G-ANN welds better (very good vs good).
Hastelloy G-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Hastelloy G-CWChoose it when strength drives the design.
Hastelloy G-ANN vs Hastelloy G-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 198 GPa28.7 Msi · Shear Modulus 76 GPa11 Msi · Bulk Modulus 174 GPa25.2 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 8.31 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °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 10.1 W/m·K5.8 BTU/hr·ft·°F · Specific Heat Capacity 445 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13.9 µm/m·K7.7 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.5 % IACS
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: Brazeability / Solderability 50 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 145 MJ/kg62,339 BTU/lb · Embodied Carbon (primary production) 11 kg CO₂/kg · Embodied Water 210 L/kg25.2 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 G-ANN vs Hastelloy G-CW — frequently asked
Is Hastelloy G-CW stronger than Hastelloy G-ANN?
Yes. Hastelloy G-CW has a typical yield strength of 750 MPa (109 ksi) against 310 MPa (45 ksi) for Hastelloy G-ANN — about 142% more. Tensile strength is 950 MPa (138 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, ANN or CW?
ANN is the default Hastelloy G 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 welds better, Hastelloy G-ANN or Hastelloy G-CW?
Hastelloy G-ANN. Its weldability rates very good (70/100) against good (60/100) for Hastelloy G-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hastelloy G-ANN and Hastelloy G-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.