Nickel Alloy Inconel 690-ANN vs Inconel 690-HW
Nickel Alloy · Inconel 690 temper comparison
Inconel 690-ANN and Inconel 690-HW are two conditions of the same nickel alloy grade, Inconel 690: ANN (annealed) versus HW (hot worked / hot finished). The chemistry is identical, so every difference below comes from the condition. Inconel 690-HW is the stronger of the two: yield strength 400 MPa (58 ksi) against 345 MPa (50 ksi) for Inconel 690-ANN, about 16% more. In exchange, Inconel 690-ANN is the more ductile: elongation 45% versus 38% for Inconel 690-HW, and Inconel 690-HW is harder (190 HB vs 170 HB).
Inconel 690-ANNChoose it when the part is bent, formed or impact-loaded.
Inconel 690-HWChoose it when strength drives the design.
Inconel 690-ANN vs Inconel 690-HW: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 211 GPa30.6 Msi · Shear Modulus 82 GPa11.9 Msi · Bulk Modulus 167 GPa24.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 350 MPa50.8 ksi · Shear Strength 450 MPa65.3 ksi · Fracture Toughness (K_IC) 200 MPa·√m182 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 8.19 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,343°C2,449 °F · Liquidus Temperature 1,377°C2,511 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 13.5 W/m·K7.8 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14 µm/m·K7.8 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 1.5 % IACS · Electrical Resistivity 1.15×10⁻⁶ Ω·m45.2 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 40 / 100 · Brazeability / Solderability 65 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 135 MJ/kg58,040 BTU/lb · Embodied Carbon (primary production) 13.5 kg CO₂/kg · Embodied Water 600 L/kg71.9 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.
Inconel 690-ANN vs Inconel 690-HW — frequently asked
Is Inconel 690-HW stronger than Inconel 690-ANN?
Yes. Inconel 690-HW has a typical yield strength of 400 MPa (58 ksi) against 345 MPa (50 ksi) for Inconel 690-ANN — about 16% more. Tensile strength is 760 MPa (110 ksi) vs 725 MPa (105 ksi).
Which condition does FabDigit quote by default, ANN or HW?
ANN is the default Inconel 690 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.
When should I choose Inconel 690-ANN over Inconel 690-HW?
Pick Inconel 690-ANN when the part is bent, formed or impact-loaded. Pick Inconel 690-HW when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Inconel 690-ANN and Inconel 690-HW 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.