Copper Alloy Cu-FRHC-H02 vs Cu-FRHC-H04
Copper Alloy · Cu-FRHC temper comparison
Cu-FRHC-H02 and Cu-FRHC-H04 are two conditions of the same copper alloy grade, Cu-FRHC: H02 (half hard) versus H04 (full hard). The chemistry is identical, so every difference below comes from the condition. Cu-FRHC-H04 is the stronger of the two: yield strength 310 MPa (45 ksi) against 250 MPa (36.3 ksi) for Cu-FRHC-H02, about 24% more; tensile strength follows at 345 MPa (50 ksi) vs 295 MPa (42.8 ksi). In exchange, Cu-FRHC-H02 is the more ductile: elongation 14% versus 8% for Cu-FRHC-H04, and Cu-FRHC-H04 is harder (92 HB vs 78 HB). Cu-FRHC-H04 is stiffer (125 GPa vs 117 GPa) and Cu-FRHC-H02 runs hotter in service (180°C vs 150°C continuous).
Cu-FRHC-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Cu-FRHC-H04Choose it when strength drives the design.
Cu-FRHC-H02 vs Cu-FRHC-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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Same in both: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.34 · Reduction in Area 75% · Hardness, Vickers 50 HV
Physical
Density and transition temperatures.
Same in both: Density 8.91 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,065°C1,949 °F · Liquidus Temperature 1,083°C1,981 °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 µm/m·K9.4 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 1.72×10⁻⁸ Ω·m0.677 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V · Corrosion Resistance 65 / 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 %) 25% · Weldability 30 / 100 · Castability 55 / 100 · Brazeability / Solderability 95 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 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.
Cu-FRHC-H02 vs Cu-FRHC-H04 — frequently asked
Is Cu-FRHC-H04 stronger than Cu-FRHC-H02?
Yes. Cu-FRHC-H04 has a typical yield strength of 310 MPa (45 ksi) against 250 MPa (36.3 ksi) for Cu-FRHC-H02 — about 24% more. Tensile strength is 345 MPa (50 ksi) vs 295 MPa (42.8 ksi).
Which condition does FabDigit quote by default, H02 or H04?
O60 is the default Cu-FRHC condition in the FabDigit quote flow (neither H02 nor H04). 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 Cu-FRHC-H02 over Cu-FRHC-H04?
Pick Cu-FRHC-H02 when the part is bent, formed or impact-loaded, or when the part sees heat. Pick Cu-FRHC-H04 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cu-FRHC-H02 and Cu-FRHC-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.