Copper Alloy C72150-H04 vs C72150-O61
Copper Alloy · C72150 temper comparison
C72150-H04 and C72150-O61 are two conditions of the same copper alloy grade, C72150: H04 (full hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C72150-H04 is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 215 MPa (31.2 ksi) for C72150-O61, about 188% more; tensile strength follows at 725 MPa (105 ksi) vs 470 MPa (68.2 ksi). In exchange, C72150-O61 is the more ductile: elongation 35% versus 6% for C72150-H04, and C72150-H04 is harder (200 HB vs 100 HB). C72150-O61 runs hotter in service (500°C vs 250°C continuous). On the shop floor, C72150-H04 machines more easily (30 vs 20 out of 100) and C72150-O61 welds better (good vs fair).
C72150-H04Choose it when strength drives the design, or when the part is machined in volume.
C72150-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C72150-H04 vs C72150-O61: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 61 GPa8.8 Msi · Bulk Modulus 158 GPa22.9 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.9 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,280°C2,336 °F · Liquidus Temperature 1,300°C2,372 °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 410 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.9 µm/m·K8.3 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -250°C-418 °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) -0.18 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 45 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 115 MJ/kg49,441 BTU/lb · Embodied Carbon (primary production) 8 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 20%
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.
C72150-H04 vs C72150-O61 — frequently asked
Is C72150-H04 stronger than C72150-O61?
Yes. C72150-H04 has a typical yield strength of 620 MPa (89.9 ksi) against 215 MPa (31.2 ksi) for C72150-O61 — about 188% more. Tensile strength is 725 MPa (105 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, H04 or O61?
O60 is the default C72150 condition in the FabDigit quote flow (neither H04 nor O61). 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, C72150-H04 or C72150-O61?
C72150-H04, by a small margin. Both rate poor for machinability — 30/100 against 20/100 for C72150-O61; for welding the order is C72150-O61 first (good, 62/100) then C72150-H04 (fair, 52/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C72150-H04 and C72150-O61 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.