Copper Alloy C26000-H03 vs C26000-O
Copper Alloy · C26000 temper comparison
C26000-H03 and C26000-O are two conditions of the same copper alloy grade, C26000: H03 (three-quarter hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. C26000-H03 is the stronger of the two: yield strength 395 MPa (57.3 ksi) against 105 MPa (15.2 ksi) for C26000-O, about 3.8 times as much; tensile strength follows at 483 MPa (70.1 ksi) vs 325 MPa (47.1 ksi). In exchange, C26000-O is the more ductile: elongation 62% versus 14% for C26000-H03, and C26000-H03 is harder (145 HB vs 55 HB). C26000-O runs hotter in service (200°C vs 150°C continuous).
C26000-H03Choose it when strength drives the design.
C26000-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C26000-H03 vs C26000-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.
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 110 GPa16 Msi · Shear Modulus 41 GPa5.9 Msi
Physical
Density and transition temperatures.
Same in both: Density 8.53 g/cm³0.31 lb/in³ · Melting Point (Solidus) 915°C1,679 °F · Liquidus Temperature 955°C1,751 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 375 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19.9 µm/m·K11.1 µin/in·°F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 28 % IACS · Electrical Resistivity 6.2×10⁻⁸ Ω·m2.44 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Brazeability / Solderability
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Castability 25 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/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.
C26000-H03 vs C26000-O — frequently asked
Is C26000-H03 stronger than C26000-O?
Yes. C26000-H03 has a typical yield strength of 395 MPa (57.3 ksi) against 105 MPa (15.2 ksi) for C26000-O — about 3.8 times as much. Tensile strength is 483 MPa (70.1 ksi) vs 325 MPa (47.1 ksi).
Which condition does FabDigit quote by default, H03 or O?
O is the default C26000 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 welds better, C26000-H03 or C26000-O?
C26000-H03. Its weldability rates fair (45/100) against fair (40/100) for C26000-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C26000-H03 and C26000-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.