Copper Alloy C52400-H04 vs C52400-H08
Copper Alloy · C52400 temper comparison
C52400-H04 and C52400-H08 are two conditions of the same copper alloy grade, C52400: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C52400-H08 is the stronger of the two: yield strength 725 MPa (105 ksi) against 585 MPa (84.8 ksi) for C52400-H04, about 24% more; tensile strength follows at 830 MPa (120 ksi) vs 690 MPa (100 ksi). In exchange, C52400-H04 is the more ductile: elongation 15% versus 5% for C52400-H08, and C52400-H08 is harder (222 HB vs 180 HB). C52400-H04 runs hotter in service (200°C vs 175°C continuous).
C52400-H04Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C52400-H08Choose it when strength drives the design.
C52400-H04 vs C52400-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, Brinell
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 8.78 g/cm³0.32 lb/in³ · Melting Point (Solidus) 843°C1,549 °F · Liquidus Temperature 1,000°C1,832 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 50 W/m·K28.9 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.4 µm/m·K10.2 µin/in·°F · Latent Heat of Fusion 200 J/g86 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 11 % IACS · Electrical Resistivity 1.57×10⁻⁷ Ω·m6.18 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V · Corrosion Resistance 72 / 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 88 / 100 · Polishability 78 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 72 MJ/kg30,954 BTU/lb · Embodied Carbon (primary production) 5.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C52400-H04 vs C52400-H08 — frequently asked
Is C52400-H08 stronger than C52400-H04?
Yes. C52400-H08 has a typical yield strength of 725 MPa (105 ksi) against 585 MPa (84.8 ksi) for C52400-H04 — about 24% more. Tensile strength is 830 MPa (120 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, H04 or H08?
H04 is the default C52400 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 welds better, C52400-H04 or C52400-H08?
C52400-H04. Its weldability rates fair (35/100) against poor (30/100) for C52400-H08.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C52400-H04 and C52400-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.