Nickel Alloy Inconel 625-O vs Inconel 625 Solution Annealed
Nickel Alloy · Inconel 625 temper comparison
Inconel 625-O and Inconel 625 Solution Annealed are two conditions of the same nickel alloy grade, Inconel 625: O (annealed) versus Solution Annealed. The chemistry is identical, so every difference below comes from the condition. Inconel 625-O is the stronger of the two: yield strength 490 MPa (71.1 ksi) against 390 MPa (56.6 ksi) for Inconel 625 Solution Annealed, about 26% more; tensile strength follows at 930 MPa (135 ksi) vs 830 MPa (120 ksi). In exchange, Inconel 625 Solution Annealed is the more ductile: elongation 55% versus 45% for Inconel 625-O, and Inconel 625-O is harder (190 HB vs 165 HB). Inconel 625 Solution Annealed runs hotter in service (980°C vs 650°C continuous).
Inconel 625-OChoose it when strength drives the design.
Inconel 625 Solution AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Inconel 625-O vs Inconel 625 Solution Annealed: 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.
Inconel 625-OInconel 625 Solution Annealed
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 207.5 GPa30.1 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 155 GPa22.5 Msi · Poisson's Ratio 0.28 · Compressive Strength 500 MPa72.5 ksi · Shear Strength 600 MPa87 ksi · Fatigue Strength (Endurance Limit) 420 MPa60.9 ksi · Fracture Toughness (K_IC) 110 MPa·√m100 ksi·√in · Hardness, Vickers 200 HV
Physical
Density and transition temperatures.
Same in both: Density 8.44 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,290°C2,354 °F · Liquidus Temperature 1,350°C2,462 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 9.8 W/m·K5.7 BTU/hr·ft·°F · Specific Heat Capacity 410 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.8 µm/m·K7.1 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.3 % IACS · Electrical Resistivity 1.29×10⁻⁶ Ω·m50.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 90 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 12% · Weldability 88 / 100 · Castability 45 / 100 · Brazeability / Solderability 65 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 225 MJ/kg96,733 BTU/lb · Embodied Carbon (primary production) 14 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
Inconel 625-O vs Inconel 625 Solution Annealed — frequently asked
Is Inconel 625-O stronger than Inconel 625 Solution Annealed?
Yes. Inconel 625-O has a typical yield strength of 490 MPa (71.1 ksi) against 390 MPa (56.6 ksi) for Inconel 625 Solution Annealed — about 26% more. Tensile strength is 930 MPa (135 ksi) vs 830 MPa (120 ksi).
Which condition does FabDigit quote by default, O or Solution Annealed?
O is the default Inconel 625 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 625-O over Inconel 625 Solution Annealed?
Pick Inconel 625-O when strength drives the design. Pick Inconel 625 Solution Annealed when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Inconel 625-O and Inconel 625 Solution Annealed 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.