Copper Alloy C10800-H04 vs C10800-H08
Copper Alloy · C10800 temper comparison
C10800-H04 and C10800-H08 are two conditions of the same copper alloy grade, C10800: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C10800-H08 is the stronger of the two: yield strength 345 MPa (50 ksi) against 310 MPa (45 ksi) for C10800-H04, about 11% more; tensile strength follows at 380 MPa (55.1 ksi) vs 345 MPa (50 ksi). In exchange, C10800-H04 is the more ductile: elongation 6% versus 4% for C10800-H08, and C10800-H08 is harder (100 HB vs 95 HB). C10800-H04 runs hotter in service (150°C vs 120°C continuous). On the shop floor, C10800-H08 welds better (80 vs 70 out of 100).
C10800-H04Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C10800-H08Choose it when strength drives the design, or when it will be welded.
C10800-H04 vs C10800-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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34 · Hardness, Vickers 48 HV
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,065°C1,949 °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
Same in both: Electrical Resistivity 1.76×10⁻⁸ Ω·m0.693 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.22 V · Corrosion Resistance 62 / 100
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% · 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) 3.6 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 15%
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.
C10800-H04 vs C10800-H08 — frequently asked
Is C10800-H08 stronger than C10800-H04?
Yes. C10800-H08 has a typical yield strength of 345 MPa (50 ksi) against 310 MPa (45 ksi) for C10800-H04 — about 11% more. Tensile strength is 380 MPa (55.1 ksi) vs 345 MPa (50 ksi).
Which condition does FabDigit quote by default, H04 or H08?
OS050 is the default C10800 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, C10800-H04 or C10800-H08?
C10800-H08. Its weldability rates very good (80/100) against very good (70/100) for C10800-H04.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C10800-H04 and C10800-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.