Copper Alloy C54400-H10 vs C54400-O61
Copper Alloy · C54400 temper comparison
C54400-H10 and C54400-O61 are two conditions of the same copper alloy grade, C54400: H10 (extra spring hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C54400-H10 is the stronger of the two: yield strength 565 MPa (81.9 ksi) against 130 MPa (18.9 ksi) for C54400-O61, about 4.3 times as much; tensile strength follows at 605 MPa (87.7 ksi) vs 310 MPa (45 ksi). In exchange, C54400-O61 is the more ductile: elongation 40% versus 3% for C54400-H10, and C54400-H10 is harder (190 HB vs 70 HB). C54400-H10 is stiffer (110 GPa vs 103 GPa) and C54400-O61 runs hotter in service (230°C vs 150°C continuous).
C54400-H10Choose it when strength drives the design.
C54400-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C54400-H10 vs C54400-O61: 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
Shear Modulus
Poisson's Ratio
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: Bulk Modulus 105 GPa15.2 Msi
Physical
Density and transition temperatures.
Melting Point (Solidus)
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Liquidus Temperature 1,000°C1,832 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 87 W/m·K50.3 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 60 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Weldability 20 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 300 L/kg35.9 gal/lb
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.
C54400-H10 vs C54400-O61 — frequently asked
Is C54400-H10 stronger than C54400-O61?
Yes. C54400-H10 has a typical yield strength of 565 MPa (81.9 ksi) against 130 MPa (18.9 ksi) for C54400-O61 — about 4.3 times as much. Tensile strength is 605 MPa (87.7 ksi) vs 310 MPa (45 ksi).
Which condition does FabDigit quote by default, H10 or O61?
H04 is the default C54400 condition in the FabDigit quote flow (neither H10 nor O61). 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, C54400-H10 or C54400-O61?
C54400-H10, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for C54400-O61.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C54400-H10 and C54400-O61 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.