Zinc Alloy Zn-Cu-Ti-H vs Zn-Cu-Ti-O
Zinc Alloy · Zn-Cu-Ti temper comparison
Zn-Cu-Ti-H and Zn-Cu-Ti-O are two conditions of the same zinc alloy grade, Zn-Cu-Ti: H (hardened) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Zn-Cu-Ti-H is the stronger of the two: yield strength 155 MPa (22.5 ksi) against 120 MPa (17.4 ksi) for Zn-Cu-Ti-O, about 29% more; tensile strength follows at 200 MPa (29 ksi) vs 165 MPa (23.9 ksi). In exchange, Zn-Cu-Ti-O is the more ductile: elongation 42% versus 25% for Zn-Cu-Ti-H, and Zn-Cu-Ti-H is harder (55 HB vs 47 HB). Zn-Cu-Ti-O runs hotter in service (100°C vs 80°C continuous).
Zn-Cu-Ti-HChoose it when strength drives the design.
Zn-Cu-Ti-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Zn-Cu-Ti-H vs Zn-Cu-Ti-O: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all zinc 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 zinc 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 85 GPa12.3 Msi · Shear Modulus 40 GPa5.8 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.25
Physical
Density and transition temperatures.
Same in both: Density 7.2 g/cm³0.26 lb/in³ · Melting Point (Solidus) 418°C784 °F · Liquidus Temperature 425°C797 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 390 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22 µm/m·K12.2 µin/in·°F · Latent Heat of Fusion 112 J/g48.2 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -1.03 V · Corrosion Resistance 60 / 100
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: Brazeability / Solderability 90 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every zinc alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Zn-Cu-Ti-H vs Zn-Cu-Ti-O — frequently asked
Is Zn-Cu-Ti-H stronger than Zn-Cu-Ti-O?
Yes. Zn-Cu-Ti-H has a typical yield strength of 155 MPa (22.5 ksi) against 120 MPa (17.4 ksi) for Zn-Cu-Ti-O — about 29% more. Tensile strength is 200 MPa (29 ksi) vs 165 MPa (23.9 ksi).
Which condition does FabDigit quote by default, H or O?
O is the default Zn-Cu-Ti 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 Zn-Cu-Ti-H over Zn-Cu-Ti-O?
Pick Zn-Cu-Ti-H when strength drives the design. Pick Zn-Cu-Ti-O 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 Zn-Cu-Ti-H and Zn-Cu-Ti-O 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.