Copper Alloy C15100-H03 vs C15100-H04
Copper Alloy · C15100 temper comparison
C15100-H03 and C15100-H04 are two conditions of the same copper alloy grade, C15100: H03 (three-quarter hard) versus H04 (full hard). The chemistry is identical, so every difference below comes from the condition. C15100-H04 is the stronger of the two: yield strength 330 MPa (47.9 ksi) against 305 MPa (44.2 ksi) for C15100-H03, about 8% more; tensile strength follows at 360 MPa (52.2 ksi) vs 335 MPa (48.6 ksi). In exchange, C15100-H03 is the more ductile: elongation 9% versus 6% for C15100-H04, and C15100-H04 is harder (105 HB vs 98 HB).
C15100-H03Choose it when the part is bent, formed or impact-loaded.
C15100-H04Choose it when strength drives the design.
C15100-H03 vs C15100-H04: 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 120 GPa17.4 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 140 GPa20.3 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) 1,080°C1,976 °F · Liquidus Temperature 1,085°C1,985 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.6 µm/m·K9.8 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 92 % IACS · Electrical Resistivity 1.87×10⁻⁸ Ω·m0.736 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V · Corrosion Resistance 60 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Same in both: Machinability 22 / 100 · Machinability Rating (AISI 1212 = 100 %) 20% · Weldability 45 / 100 · Castability 45 / 100 · Brazeability / Solderability 70 / 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) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 25%
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.
C15100-H03 vs C15100-H04 — frequently asked
Is C15100-H04 stronger than C15100-H03?
Yes. C15100-H04 has a typical yield strength of 330 MPa (47.9 ksi) against 305 MPa (44.2 ksi) for C15100-H03 — about 8% more. Tensile strength is 360 MPa (52.2 ksi) vs 335 MPa (48.6 ksi).
Which condition does FabDigit quote by default, H03 or H04?
H04 is the default C15100 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.
When should I choose C15100-H03 over C15100-H04?
Pick C15100-H03 when the part is bent, formed or impact-loaded. Pick C15100-H04 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C15100-H03 and C15100-H04 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.