Copper Alloy C70600-H04 vs C70600-O60
Copper Alloy · C70600 temper comparison
C70600-H04 and C70600-O60 are two conditions of the same copper alloy grade, C70600: H04 (full hard) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C70600-H04 is the stronger of the two: yield strength 440 MPa (63.8 ksi) against 110 MPa (16 ksi) for C70600-O60, about 4.0 times as much; tensile strength follows at 470 MPa (68.2 ksi) vs 300 MPa (43.5 ksi). In exchange, C70600-O60 is the more ductile: elongation 42% versus 6% for C70600-H04, and C70600-H04 is harder (145 HB vs 60 HB). On the shop floor, C70600-H04 machines more easily (fair vs poor) and C70600-O60 welds better (excellent vs very good).
C70600-H04Choose it when strength drives the design, or when the part is machined in volume.
C70600-O60Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C70600-H04 vs C70600-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, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 124 GPa18 Msi · Shear Modulus 47 GPa6.8 Msi · Bulk Modulus 130 GPa18.9 Msi · Poisson's Ratio 0.33 · Reduction in Area 60%
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,100°C2,012 °F · Liquidus Temperature 1,145°C2,093 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17 µm/m·K9.4 µin/in·°F · Latent Heat of Fusion 200 J/g86 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -195°C-319 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 1.82×10⁻⁷ Ω·m7.17 µΩ·in
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
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Castability 45 / 100 · Brazeability / Solderability 88 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 75 MJ/kg32,244 BTU/lb · Embodied Carbon (primary production) 5.2 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 30%
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.
C70600-H04 vs C70600-O60 — frequently asked
Is C70600-H04 stronger than C70600-O60?
Yes. C70600-H04 has a typical yield strength of 440 MPa (63.8 ksi) against 110 MPa (16 ksi) for C70600-O60 — about 4.0 times as much. Tensile strength is 470 MPa (68.2 ksi) vs 300 MPa (43.5 ksi).
Which condition does FabDigit quote by default, H04 or O60?
OS050 is the default C70600 condition in the FabDigit quote flow (neither H04 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, C70600-H04 or C70600-O60?
C70600-H04. Its machinability rates fair (42/100) against poor (26/100) for C70600-O60; for welding the order is C70600-O60 first (excellent, 92/100) then C70600-H04 (very good, 82/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C70600-H04 and C70600-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.