Nickel Alloy Inconel 690 vs Inconel 693
Nickel Alloy · grade comparison
Nickel Alloy Inconel 690 and Inconel 693 are both nickel alloy grades. Inconel 693 is the stronger of the two: yield strength 400 MPa (58 ksi) against 345 MPa (50 ksi) for Inconel 690, about 16% more; tensile strength follows at 790 MPa (115 ksi) vs 725 MPa (105 ksi). Inconel 693 is harder — 195 HB against 170 HB for Inconel 690 — which matters for wear surfaces and threads. Inconel 693 is lighter (7.63 g/cm³ vs 8.19 g/cm³ for Inconel 690) and Inconel 690 is stiffer (211 GPa vs 200 GPa). On the shop floor, Inconel 690 welds better (very good vs good) and Inconel 690 forms better (very good vs good).
Inconel 690Choose it when it will be welded.
Inconel 693Choose it when strength drives the design, or when surface hardness matters.
Inconel 690 vs Inconel 693: 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
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Bulk Modulus 167 GPa24.2 Msi · Elongation at Break 45% · Fatigue Strength (Endurance Limit) 300 MPa43.5 ksi
Physical
Density and transition temperatures.
Density
Liquidus Temperature
Same in both: Melting Point (Solidus) 1,343°C2,449 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 3
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.
Manufacturing and finishing
| Capability | Inconel 690 | Inconel 693 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
Inconel 690 vs Inconel 693 — frequently asked
Is Inconel 693 stronger than Inconel 690?
Yes. Inconel 693 has a typical yield strength of 400 MPa (58 ksi) against 345 MPa (50 ksi) for Inconel 690 — about 16% more. Tensile strength is 790 MPa (115 ksi) vs 725 MPa (105 ksi).
Which is cheaper, Inconel 690 or Inconel 693?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Inconel 690 or Inconel 693?
Inconel 690, by a small margin. Both rate poor for machinability — 25/100 against 16/100 for Inconel 693; for welding the order is Inconel 690 first (very good, 78/100) then Inconel 693 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Inconel 690 and Inconel 693 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.