Copper Alloy C78200-H01 vs C78200-H04
Copper Alloy · C78200 temper comparison
C78200-H01 and C78200-H04 are two conditions of the same copper alloy grade, C78200: H01 (quarter hard) versus H04 (full hard). The chemistry is identical, so every difference below comes from the condition. C78200-H04 is the stronger of the two: yield strength 496 MPa (71.9 ksi) against 331 MPa (48 ksi) for C78200-H01, about 50% more; tensile strength follows at 565 MPa (81.9 ksi) vs 434 MPa (62.9 ksi). In exchange, C78200-H01 is the more ductile: elongation 20% versus 3% for C78200-H04, and C78200-H04 is harder (170 HB vs 120 HB). C78200-H01 runs hotter in service (175°C vs 150°C continuous).
C78200-H01Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C78200-H04Choose it when strength drives the design.
C78200-H01 vs C78200-H04: 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 128 GPa18.6 Msi · Shear Modulus 48 GPa7 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.72 g/cm³0.32 lb/in³ · Melting Point (Solidus) 966°C1,771 °F · Liquidus Temperature 1,010°C1,850 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 40 W/m·K23.1 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.7 µm/m·K9.3 µin/in·°F · Latent Heat of Fusion 175 J/g75.2 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 9 % IACS · Electrical Resistivity 1.92×10⁻⁷ Ω·m7.56 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.24 V · Corrosion Resistance 62 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 20 / 100 · Brazeability / Solderability 55 / 100 · Polishability 80 / 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 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 40%
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.
C78200-H01 vs C78200-H04 — frequently asked
Is C78200-H04 stronger than C78200-H01?
Yes. C78200-H04 has a typical yield strength of 496 MPa (71.9 ksi) against 331 MPa (48 ksi) for C78200-H01 — about 50% more. Tensile strength is 565 MPa (81.9 ksi) vs 434 MPa (62.9 ksi).
Which condition does FabDigit quote by default, H01 or H04?
H02 is the default C78200 condition in the FabDigit quote flow (neither H01 nor H04). 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, C78200-H01 or C78200-H04?
C78200-H04, by a small margin. Both rate good for machinability — 66/100 against 60/100 for C78200-H01.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C78200-H01 and C78200-H04 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.