Titanium C-9 vs ZTC4
Titanium · grade comparison
Titanium C-9 and ZTC4 are both titanium grades. ZTC4 is the stronger of the two: yield strength 840 MPa (122 ksi) against 550 MPa (79.8 ksi) for C-9, about 53% more; tensile strength follows at 910 MPa (132 ksi) vs 690 MPa (100 ksi). In exchange, C-9 is the more ductile: elongation 12% versus 8% for ZTC4, and ZTC4 is harder (325 HB vs 240 HB). ZTC4 is stiffer (110 GPa vs 100 GPa) and ZTC4 runs hotter in service (350°C vs 300°C continuous).
C-9Choose it when the part is bent, formed or impact-loaded.
ZTC4Choose it when strength drives the design, or when the part sees heat.
C-9 vs ZTC4: 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
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Bulk Modulus 110 GPa16 Msi · Fatigue Strength (Endurance Limit) 340 MPa49.3 ksi
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)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 365 J/g157 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Castability
Brazeability / Solderability
Same in both: Formability (cold) 10 / 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 | ZTC4 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
C-9 vs ZTC4 — frequently asked
Is ZTC4 stronger than C-9?
Yes. ZTC4 has a typical yield strength of 840 MPa (122 ksi) against 550 MPa (79.8 ksi) for C-9 — about 53% more. Tensile strength is 910 MPa (132 ksi) vs 690 MPa (100 ksi).
Which is cheaper, C-9 or ZTC4?
Both sit in the same relative cost tier ($$$$, 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 ZTC4?
C-9, by a small margin. Both rate poor for machinability — 25/100 against 18/100 for ZTC4; for welding the order is C-9 first (very good, 80/100) then ZTC4 (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C-9 and ZTC4 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.