Copper Alloy C79200-H04 vs C79200-H08
Copper Alloy · C79200 temper comparison
C79200-H04 and C79200-H08 are two conditions of the same copper alloy grade, C79200: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C79200-H08 is the stronger of the two: yield strength 605 MPa (87.7 ksi) against 510 MPa (74 ksi) for C79200-H04, about 19% more; tensile strength follows at 675 MPa (97.9 ksi) vs 585 MPa (84.8 ksi). In exchange, C79200-H04 is the more ductile: elongation 5% versus 2% for C79200-H08, and C79200-H08 is harder (205 HB vs 180 HB). C79200-H04 runs hotter in service (175°C vs 150°C continuous).
C79200-H04Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C79200-H08Choose it when strength drives the design.
C79200-H04 vs C79200-H08: 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 124 GPa18 Msi · Shear Modulus 46 GPa6.7 Msi · Bulk Modulus 121 GPa17.5 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.7 g/cm³0.31 lb/in³ · Melting Point (Solidus) 995°C1,823 °F · Liquidus Temperature 1,030°C1,886 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 190 J/g81.7 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 9 % IACS · Electrical Resistivity 1.92×10⁻⁷ Ω·m7.56 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 20 / 100 · Brazeability / Solderability 60 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 68 MJ/kg29,235 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 280 L/kg33.6 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.
C79200-H04 vs C79200-H08 — frequently asked
Is C79200-H08 stronger than C79200-H04?
Yes. C79200-H08 has a typical yield strength of 605 MPa (87.7 ksi) against 510 MPa (74 ksi) for C79200-H04 — about 19% more. Tensile strength is 675 MPa (97.9 ksi) vs 585 MPa (84.8 ksi).
Which condition does FabDigit quote by default, H04 or H08?
H04 is the default C79200 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, C79200-H04 or C79200-H08?
C79200-H08, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for C79200-H04.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C79200-H04 and C79200-H08 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.