Copper Alloy C31600-H06 vs C31600-O61
Copper Alloy · C31600 temper comparison
C31600-H06 and C31600-O61 are two conditions of the same copper alloy grade, C31600: H06 (extra hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C31600-H06 is the stronger of the two: yield strength 400 MPa (58 ksi) against 125 MPa (18.1 ksi) for C31600-O61, about 3.2 times as much; tensile strength follows at 450 MPa (65.3 ksi) vs 300 MPa (43.5 ksi). In exchange, C31600-O61 is the more ductile: elongation 40% versus 6% for C31600-H06, and C31600-H06 is harder (122 HB vs 65 HB). C31600-O61 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C31600-H06 machines more easily (excellent vs very good).
C31600-H06Choose it when strength drives the design, or when the part is machined in volume.
C31600-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C31600-H06 vs C31600-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 115 GPa16.7 Msi · Shear Modulus 43 GPa6.2 Msi · Bulk Modulus 118 GPa17.1 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.78 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,004°C1,839 °F · Liquidus Temperature 1,030°C1,886 °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) 18.4 µm/m·K10.2 µin/in·°F · Latent Heat of Fusion 200 J/g86 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) -0.28 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 20 / 100 · Brazeability / Solderability 80 / 100 · Polishability 75 / 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 40%
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.
C31600-H06 vs C31600-O61 — frequently asked
Is C31600-H06 stronger than C31600-O61?
Yes. C31600-H06 has a typical yield strength of 400 MPa (58 ksi) against 125 MPa (18.1 ksi) for C31600-O61 — about 3.2 times as much. Tensile strength is 450 MPa (65.3 ksi) vs 300 MPa (43.5 ksi).
Which condition does FabDigit quote by default, H06 or O61?
H02 is the default C31600 condition in the FabDigit quote flow (neither H06 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, C31600-H06 or C31600-O61?
C31600-H06. Its machinability rates excellent (85/100) against very good (74/100) for C31600-O61.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C31600-H06 and C31600-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.