Titanium C-9 vs Grade C-5
Titanium · grade comparison
Titanium C-9 and Grade C-5 are both titanium grades. Grade C-5 is the stronger of the two: yield strength 865 MPa (125 ksi) against 550 MPa (79.8 ksi) for C-9, about 57% more; tensile strength follows at 940 MPa (136 ksi) vs 690 MPa (100 ksi). In exchange, C-9 is the more ductile: elongation 12% versus 10% for Grade C-5, and Grade C-5 is harder (330 HB vs 240 HB). Grade C-5 is stiffer (112 GPa vs 100 GPa) and Grade C-5 runs hotter in service (400°C vs 300°C continuous). On the shop floor, C-9 welds better (very good vs good).
C-9Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
Grade C-5Choose it when strength drives the design, or when the part sees heat.
C-9 vs Grade C-5: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium 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 titanium 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)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Bulk Modulus 110 GPa16 Msi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: 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) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Brazeability / Solderability
Same in both: Machinability Rating (AISI 1212 = 100 %) 22% · Castability 70 / 100 · Polishability 70 / 100
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
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | C-9 | Grade C-5 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
C-9 vs Grade C-5 — frequently asked
Is Grade C-5 stronger than C-9?
Yes. Grade C-5 has a typical yield strength of 865 MPa (125 ksi) against 550 MPa (79.8 ksi) for C-9 — about 57% more. Tensile strength is 940 MPa (136 ksi) vs 690 MPa (100 ksi).
Which is cheaper, C-9 or Grade C-5?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, C-9 or Grade C-5?
C-9, by a small margin. Both rate poor for machinability — 25/100 against 20/100 for Grade C-5; for welding the order is C-9 first (very good, 80/100) then Grade C-5 (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C-9 and Grade C-5 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.