Copper Alloy C66100-H04 vs C66100-H06
Copper Alloy · C66100 temper comparison
C66100-H04 and C66100-H06 are two conditions of the same copper alloy grade, C66100: H04 (full hard) versus H06 (extra hard). The chemistry is identical, so every difference below comes from the condition. C66100-H06 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 380 MPa (55.1 ksi) for C66100-H04, about 26% more; tensile strength follows at 585 MPa (84.8 ksi) vs 515 MPa (74.7 ksi). In exchange, C66100-H04 is the more ductile: elongation 12% versus 8% for C66100-H06, and C66100-H06 is harder (175 HB vs 150 HB). C66100-H04 runs hotter in service (200°C vs 180°C continuous).
C66100-H04Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C66100-H06Choose it when strength drives the design.
C66100-H04 vs C66100-H06: 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
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.53 g/cm³0.31 lb/in³ · Melting Point (Solidus) 971°C1,780 °F · Liquidus Temperature 1,027°C1,881 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 57 W/m·K32.9 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.4 µm/m·K10.2 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 12 % IACS · Electrical Resistivity 1.44×10⁻⁷ Ω·m5.67 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.26 V · Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Same in both: Machinability 55 / 100 · Machinability Rating (AISI 1212 = 100 %) 50% · Castability 35 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 40%
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.
C66100-H04 vs C66100-H06 — frequently asked
Is C66100-H06 stronger than C66100-H04?
Yes. C66100-H06 has a typical yield strength of 480 MPa (69.6 ksi) against 380 MPa (55.1 ksi) for C66100-H04 — about 26% more. Tensile strength is 585 MPa (84.8 ksi) vs 515 MPa (74.7 ksi).
Which condition does FabDigit quote by default, H04 or H06?
H04 is the default C66100 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, C66100-H04 or C66100-H06?
C66100-H04. Its weldability rates poor (30/100) against poor (25/100) for C66100-H06.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C66100-H04 and C66100-H06 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.