Copper Alloy C36700-H02 vs C36700-O61
Copper Alloy · C36700 temper comparison
C36700-H02 and C36700-O61 are two conditions of the same copper alloy grade, C36700: H02 (half hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C36700-H02 is the stronger of the two: yield strength 345 MPa (50 ksi) against 125 MPa (18.1 ksi) for C36700-O61, about 176% more; tensile strength follows at 470 MPa (68.2 ksi) vs 360 MPa (52.2 ksi). In exchange, C36700-O61 is the more ductile: elongation 50% versus 18% for C36700-H02, and C36700-H02 is harder (145 HB vs 90 HB). C36700-O61 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C36700-H02 machines more easily (65 vs 55 out of 100).
C36700-H02Choose it when strength drives the design, or when the part is machined in volume.
C36700-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C36700-H02 vs C36700-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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.41 g/cm³0.3 lb/in³ · Melting Point (Solidus) 885°C1,625 °F · Liquidus Temperature 900°C1,652 °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 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.8 µm/m·K11.6 µin/in·°F · Latent Heat of Fusion 165 J/g70.9 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) -0.3 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 25 / 100 · Brazeability / Solderability 65 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 70%
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.
C36700-H02 vs C36700-O61 — frequently asked
Is C36700-H02 stronger than C36700-O61?
Yes. C36700-H02 has a typical yield strength of 345 MPa (50 ksi) against 125 MPa (18.1 ksi) for C36700-O61 — about 176% more. Tensile strength is 470 MPa (68.2 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, H02 or O61?
M20 is the default C36700 condition in the FabDigit quote flow (neither H02 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, C36700-H02 or C36700-O61?
C36700-H02, by a small margin. Both rate good for machinability — 65/100 against 55/100 for C36700-O61.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C36700-H02 and C36700-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.