Copper Alloy C77100-H02 vs C77100-H08
Copper Alloy · C77100 temper comparison
C77100-H02 and C77100-H08 are two conditions of the same copper alloy grade, C77100: H02 (half hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C77100-H08 is the stronger of the two: yield strength 700 MPa (102 ksi) against 470 MPa (68.2 ksi) for C77100-H02, about 49% more; tensile strength follows at 790 MPa (115 ksi) vs 570 MPa (82.7 ksi). In exchange, C77100-H02 is the more ductile: elongation 15% versus 3% for C77100-H08, and C77100-H08 is harder (220 HV vs 165 HV). C77100-H02 runs hotter in service (200°C vs 150°C continuous). On the shop floor, C77100-H02 welds better (50 vs 40 out of 100).
C77100-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C77100-H08Choose it when strength drives the design.
C77100-H02 vs C77100-H08: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 50 GPa7.3 Msi · Bulk Modulus 129 GPa18.7 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.7 g/cm³0.31 lb/in³ · Melting Point (Solidus) 1,040°C1,904 °F · Liquidus Temperature 1,100°C2,012 °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 380 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 180 J/g77.4 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) -0.19 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: Brazeability / Solderability 75 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 78 MJ/kg33,534 BTU/lb · Embodied Carbon (primary production) 5.8 kg CO₂/kg · Embodied Water 320 L/kg38.3 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.
C77100-H02 vs C77100-H08 — frequently asked
Is C77100-H08 stronger than C77100-H02?
Yes. C77100-H08 has a typical yield strength of 700 MPa (102 ksi) against 470 MPa (68.2 ksi) for C77100-H02 — about 49% more. Tensile strength is 790 MPa (115 ksi) vs 570 MPa (82.7 ksi).
Which condition does FabDigit quote by default, H02 or H08?
O60 is the default C77100 condition in the FabDigit quote flow (neither H02 nor H08). 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, C77100-H02 or C77100-H08?
C77100-H08. Its machinability rates fair (40/100) against poor (33/100) for C77100-H02; for welding the order is C77100-H02 first (fair, 50/100) then C77100-H08 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C77100-H02 and C77100-H08 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.