Copper Alloy C61500-H04 vs C61500-H08
Copper Alloy · C61500 temper comparison
C61500-H04 and C61500-H08 are two conditions of the same copper alloy grade, C61500: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C61500-H08 is the stronger of the two: yield strength 690 MPa (100 ksi) against 585 MPa (84.8 ksi) for C61500-H04, about 18% more; tensile strength follows at 760 MPa (110 ksi) vs 690 MPa (100 ksi). In exchange, C61500-H04 is the more ductile: elongation 6% versus 3% for C61500-H08, and C61500-H08 is harder (235 HB vs 205 HB). C61500-H04 runs hotter in service (200°C vs 180°C continuous).
C61500-H04Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C61500-H08Choose it when strength drives the design.
C61500-H04 vs C61500-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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 112 GPa16.2 Msi · Poisson's Ratio 0.32 · Reduction in Area 45% · Compressive Strength 500 MPa72.5 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.72 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,045°C1,913 °F · Liquidus Temperature 1,060°C1,940 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 377 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 210 J/g90.3 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.64×10⁻⁷ Ω·m6.46 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.27 V · Corrosion Resistance 82 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 55 / 100 · Brazeability / Solderability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 250 L/kg30 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.
C61500-H04 vs C61500-H08 — frequently asked
Is C61500-H08 stronger than C61500-H04?
Yes. C61500-H08 has a typical yield strength of 690 MPa (100 ksi) against 585 MPa (84.8 ksi) for C61500-H04 — about 18% more. Tensile strength is 760 MPa (110 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, H04 or H08?
O60 is the default C61500 condition in the FabDigit quote flow (neither H04 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 welds better, C61500-H04 or C61500-H08?
C61500-H04. Its weldability rates good (55/100) against fair (48/100) for C61500-H08.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C61500-H04 and C61500-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.