Copper Alloy C71520-H02 vs C71520-O60
Copper Alloy · C71520 temper comparison
C71520-H02 and C71520-O60 are two conditions of the same copper alloy grade, C71520: H02 (half hard) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C71520-H02 is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 140 MPa (20.3 ksi) for C71520-O60, about 196% more; tensile strength follows at 505 MPa (73.2 ksi) vs 380 MPa (55.1 ksi). In exchange, C71520-O60 is the more ductile: elongation 45% versus 15% for C71520-H02, and C71520-H02 is harder (150 HB vs 85 HB). C71520-O60 runs hotter in service (350°C vs 300°C continuous).
C71520-H02Choose it when strength drives the design.
C71520-O60Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C71520-H02 vs C71520-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 152 GPa22 Msi · Shear Modulus 57 GPa8.3 Msi · Bulk Modulus 158 GPa22.9 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,171°C2,140 °F · Liquidus Temperature 1,238°C2,260 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 29 W/m·K16.8 BTU/hr·ft·°F · 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 215 J/g92.4 BTU/lb · Min Service Temperature -198°C-324 °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) -0.25 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 50 / 100 · Brazeability / Solderability 80 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 90 MJ/kg38,693 BTU/lb · Embodied Carbon (primary production) 6.6 kg CO₂/kg · Embodied Water 260 L/kg31.2 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.
C71520-H02 vs C71520-O60 — frequently asked
Is C71520-H02 stronger than C71520-O60?
Yes. C71520-H02 has a typical yield strength of 415 MPa (60.2 ksi) against 140 MPa (20.3 ksi) for C71520-O60 — about 196% more. Tensile strength is 505 MPa (73.2 ksi) vs 380 MPa (55.1 ksi).
Which condition does FabDigit quote by default, H02 or O60?
O60 is the default C71520 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.
Which is easier to machine, C71520-H02 or C71520-O60?
C71520-H02, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for C71520-O60; for welding the order is C71520-O60 first (excellent, 90/100) then C71520-H02 (excellent, 85/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C71520-H02 and C71520-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.