Copper Alloy C66300-H02 vs C66300-H08
Copper Alloy · C66300 temper comparison
C66300-H02 and C66300-H08 are two conditions of the same copper alloy grade, C66300: H02 (half hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C66300-H08 is the stronger of the two: yield strength 600 MPa (87 ksi) against 400 MPa (58 ksi) for C66300-H02, about 50% more; tensile strength follows at 660 MPa (95.7 ksi) vs 500 MPa (72.5 ksi). In exchange, C66300-H02 is the more ductile: elongation 15% versus 3.5% for C66300-H08, and C66300-H08 is harder (195 HV vs 145 HV). C66300-H02 runs hotter in service (150°C vs 120°C continuous).
C66300-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C66300-H08Choose it when strength drives the design.
C66300-H02 vs C66300-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.
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: Elastic (Young's) Modulus 110 GPa16 Msi · Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.55 g/cm³0.31 lb/in³ · Melting Point (Solidus) 900°C1,652 °F · Liquidus Temperature 935°C1,715 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 105 W/m·K60.7 BTU/hr·ft·°F · Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19.9 µm/m·K11.1 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 25 % IACS · Electrical Resistivity 6.9×10⁻⁸ Ω·m2.72 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 58 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Weldability 30 / 100 · Brazeability / Solderability 80 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 50%
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.
C66300-H02 vs C66300-H08 — frequently asked
Is C66300-H08 stronger than C66300-H02?
Yes. C66300-H08 has a typical yield strength of 600 MPa (87 ksi) against 400 MPa (58 ksi) for C66300-H02 — about 50% more. Tensile strength is 660 MPa (95.7 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, H02 or H08?
H08 is the default C66300 condition in the FabDigit quote flow. 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, C66300-H02 or C66300-H08?
C66300-H08. Its machinability rates fair (35/100) against poor (30/100) for C66300-H02.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C66300-H02 and C66300-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.