Copper Alloy C33000-H04 vs C33000-O
Copper Alloy · C33000 temper comparison
C33000-H04 and C33000-O are two conditions of the same copper alloy grade, C33000: H04 (full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. C33000-H04 is the stronger of the two: yield strength 390 MPa (56.6 ksi) against 110 MPa (16 ksi) for C33000-O, about 3.5 times as much; tensile strength follows at 500 MPa (72.5 ksi) vs 340 MPa (49.3 ksi). In exchange, C33000-O is the more ductile: elongation 55% versus 8% for C33000-H04, and C33000-H04 is harder (145 HB vs 55 HB). C33000-O runs hotter in service (200°C vs 150°C continuous). On the shop floor, C33000-H04 machines more easily (excellent vs very good).
C33000-H04Choose it when strength drives the design, or when the part is machined in volume.
C33000-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C33000-H04 vs C33000-O: 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
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 111 GPa16.1 Msi · Poisson's Ratio 0.34 · Reduction in Area 62% · Charpy V-Notch Impact (RT) 55 J40.6 ft·lbf · Hardness, Vickers 58 HV
Physical
Density and transition temperatures.
Same in both: Density 8.47 g/cm³0.31 lb/in³ · Melting Point (Solidus) 899°C1,650 °F · Liquidus Temperature 954°C1,749 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 121 W/m·K69.9 BTU/hr·ft·°F · Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.2 µm/m·K11.2 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 26 % IACS · Electrical Resistivity 6.6×10⁻⁸ Ω·m2.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 180% · Weldability 25 / 100 · Brazeability / Solderability 85 / 100 · Polishability 80 / 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 180 L/kg21.6 gal/lb · Typical Recycled Content 50%
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.
C33000-H04 vs C33000-O — frequently asked
Is C33000-H04 stronger than C33000-O?
Yes. C33000-H04 has a typical yield strength of 390 MPa (56.6 ksi) against 110 MPa (16 ksi) for C33000-O — about 3.5 times as much. Tensile strength is 500 MPa (72.5 ksi) vs 340 MPa (49.3 ksi).
Which condition does FabDigit quote by default, H04 or O?
O is the default C33000 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 is easier to machine, C33000-H04 or C33000-O?
C33000-H04. Its machinability rates excellent (85/100) against very good (70/100) for C33000-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C33000-H04 and C33000-O 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.