Copper Alloy C54400-H02 vs C54400-O61
Copper Alloy · C54400 temper comparison
C54400-H02 and C54400-O61 are two conditions of the same copper alloy grade, C54400: H02 (half hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C54400-H02 is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 130 MPa (18.9 ksi) for C54400-O61, about 112% more; tensile strength follows at 400 MPa (58 ksi) vs 310 MPa (45 ksi). In exchange, C54400-O61 is the more ductile: elongation 40% versus 28% for C54400-H02, and C54400-H02 is harder (125 HB vs 70 HB). C54400-O61 runs hotter in service (230°C vs 200°C continuous).
C54400-H02Choose 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-H02 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.
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 103 GPa14.9 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 927°C1,701 °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 87 W/m·K50.3 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.1 µm/m·K9.5 µin/in·°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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.31 V · 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)
Same in both: Weldability 20 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 45%
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-H02 vs C54400-O61 — frequently asked
Is C54400-H02 stronger than C54400-O61?
Yes. C54400-H02 has a typical yield strength of 275 MPa (39.9 ksi) against 130 MPa (18.9 ksi) for C54400-O61 — about 112% more. Tensile strength is 400 MPa (58 ksi) vs 310 MPa (45 ksi).
Which condition does FabDigit quote by default, H02 or O61?
H04 is the default C54400 condition in the FabDigit quote flow (neither H02 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-H02 or C54400-O61?
C54400-H02, 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-H02 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.