Copper Alloy C63800-H04 vs C63800-O61
Copper Alloy · C63800 temper comparison
C63800-H04 and C63800-O61 are two conditions of the same copper alloy grade, C63800: H04 (full hard) versus O61 (annealed). The chemistry is identical, so every difference below comes from the condition. C63800-H04 is the stronger of the two: yield strength 740 MPa (107 ksi) against 290 MPa (42.1 ksi) for C63800-O61, about 155% more; tensile strength follows at 795 MPa (115 ksi) vs 570 MPa (82.7 ksi). In exchange, C63800-O61 is the more ductile: elongation 35% versus 6% for C63800-H04, and C63800-O61 is harder (25 HRC vs 22 HRC). C63800-O61 runs hotter in service (300°C vs 210°C continuous).
C63800-H04Choose it when strength drives the design.
C63800-O61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C63800-H04 vs C63800-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, Rockwell B
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 124 GPa18 Msi · Shear Modulus 47 GPa6.8 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.32 · Hardness, Brinell 255 HB
Physical
Density and transition temperatures.
Same in both: Density 7.69 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,060°C1,940 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 44.6 W/m·K25.8 BTU/hr·ft·°F · Specific Heat Capacity 376 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.9 µm/m·K9.4 µin/in·°F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.72×10⁻⁷ Ω·m6.77 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.26 V · Corrosion Resistance 74 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 32 / 100 · Machinability Rating (AISI 1212 = 100 %) 30% · Weldability 45 / 100 · Castability 25 / 100 · Brazeability / Solderability 55 / 100 · Polishability 80 / 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 300 L/kg35.9 gal/lb · Typical Recycled Content 30%
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.
C63800-H04 vs C63800-O61 — frequently asked
Is C63800-H04 stronger than C63800-O61?
Yes. C63800-H04 has a typical yield strength of 740 MPa (107 ksi) against 290 MPa (42.1 ksi) for C63800-O61 — about 155% more. Tensile strength is 795 MPa (115 ksi) vs 570 MPa (82.7 ksi).
Which condition does FabDigit quote by default, H04 or O61?
H08 is the default C63800 condition in the FabDigit quote flow (neither H04 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.
When should I choose C63800-H04 over C63800-O61?
Pick C63800-H04 when strength drives the design. Pick C63800-O61 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C63800-H04 and C63800-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.