Copper Alloy Cu-OF-H02 vs Cu-OF-H08
Copper Alloy · Cu-OF temper comparison
Cu-OF-H02 and Cu-OF-H08 are two conditions of the same copper alloy grade, Cu-OF: H02 (half hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. Cu-OF-H08 is the stronger of the two: yield strength 340 MPa (49.3 ksi) against 250 MPa (36.3 ksi) for Cu-OF-H02, about 36% more; tensile strength follows at 365 MPa (52.9 ksi) vs 285 MPa (41.3 ksi). In exchange, Cu-OF-H02 is the more ductile: elongation 14% versus 4% for Cu-OF-H08, and Cu-OF-H08 is harder (100 HB vs 80 HB). Cu-OF-H02 runs hotter in service (150°C vs 120°C continuous).
Cu-OF-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Cu-OF-H08Choose it when strength drives the design.
Cu-OF-H02 vs Cu-OF-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34 · Fracture Toughness (K_IC) 90 MPa·√m81.9 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,083°C1,981 °F · Liquidus Temperature 1,083°C1,981 °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 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.7 µm/m·K9.8 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 V · Corrosion Resistance 55 / 100
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: Castability 45 / 100 · Brazeability / Solderability 95 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 4 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 25%
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.
Cu-OF-H02 vs Cu-OF-H08 — frequently asked
Is Cu-OF-H08 stronger than Cu-OF-H02?
Yes. Cu-OF-H08 has a typical yield strength of 340 MPa (49.3 ksi) against 250 MPa (36.3 ksi) for Cu-OF-H02 — about 36% more. Tensile strength is 365 MPa (52.9 ksi) vs 285 MPa (41.3 ksi).
Which condition does FabDigit quote by default, H02 or H08?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, Cu-OF-H02 or Cu-OF-H08?
Cu-OF-H08, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for Cu-OF-H02; for welding the order is Cu-OF-H02 first (fair, 50/100) then Cu-OF-H08 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cu-OF-H02 and Cu-OF-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.