Copper Alloy C73100-H08 vs C73100-O60
Copper Alloy · C73100 temper comparison
C73100-H08 and C73100-O60 are two conditions of the same copper alloy grade, C73100: H08 (spring hard) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C73100-H08 is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 125 MPa (18.1 ksi) for C73100-O60, about 4.5 times as much; tensile strength follows at 620 MPa (89.9 ksi) vs 340 MPa (49.3 ksi). In exchange, C73100-O60 is the more ductile: elongation 43% versus 2.5% for C73100-H08, and C73100-H08 is harder (200 HV vs 80 HV). C73100-O60 runs hotter in service (300°C vs 160°C continuous). On the shop floor, C73100-H08 machines more easily (fair vs poor) and C73100-O60 welds better (good vs fair).
C73100-H08Choose it when strength drives the design, or when the part is machined in volume.
C73100-O60Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C73100-H08 vs C73100-O60: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper 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 copper 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)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 125 GPa18.1 Msi · Shear Modulus 47 GPa6.8 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.73 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,040°C1,904 °F · Liquidus Temperature 1,080°C1,976 °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 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °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) -0.22 V
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: Castability 40 / 100 · Brazeability / Solderability 85 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 65 MJ/kg27,945 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 350 L/kg41.9 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
C73100-H08 vs C73100-O60 — frequently asked
Is C73100-H08 stronger than C73100-O60?
Yes. C73100-H08 has a typical yield strength of 560 MPa (81.2 ksi) against 125 MPa (18.1 ksi) for C73100-O60 — about 4.5 times as much. Tensile strength is 620 MPa (89.9 ksi) vs 340 MPa (49.3 ksi).
Which condition does FabDigit quote by default, H08 or O60?
H02 is the default C73100 condition in the FabDigit quote flow (neither H08 nor O60). 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.
Which is easier to machine, C73100-H08 or C73100-O60?
C73100-H08. Its machinability rates fair (40/100) against poor (25/100) for C73100-O60; for welding the order is C73100-O60 first (good, 60/100) then C73100-H08 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C73100-H08 and C73100-O60 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.