Copper Alloy C12500-H02 vs C12500-H08
Copper Alloy · C12500 temper comparison
C12500-H02 and C12500-H08 are two conditions of the same copper alloy grade, C12500: H02 (half hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C12500-H08 is the stronger of the two: yield strength 350 MPa (50.8 ksi) against 250 MPa (36.3 ksi) for C12500-H02, about 40% more; tensile strength follows at 380 MPa (55.1 ksi) vs 290 MPa (42.1 ksi). In exchange, C12500-H02 is the more ductile: elongation 14% versus 4% for C12500-H08, and C12500-H08 is harder (105 HB vs 82 HB). C12500-H02 runs hotter in service (150°C vs 130°C continuous).
C12500-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C12500-H08Choose it when strength drives the design.
C12500-H02 vs C12500-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
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 140 GPa20.3 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.94 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) 17.7 µm/m·K9.8 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V · Corrosion Resistance 68 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Weldability 35 / 100 · Castability 45 / 100 · Brazeability / Solderability 92 / 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) 3.3 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/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.
C12500-H02 vs C12500-H08 — frequently asked
Is C12500-H08 stronger than C12500-H02?
Yes. C12500-H08 has a typical yield strength of 350 MPa (50.8 ksi) against 250 MPa (36.3 ksi) for C12500-H02 — about 40% more. Tensile strength is 380 MPa (55.1 ksi) vs 290 MPa (42.1 ksi).
Which condition does FabDigit quote by default, H02 or H08?
H04 is the default C12500 condition in the FabDigit quote flow (neither H02 nor H08). 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 C12500-H02 over C12500-H08?
Pick C12500-H02 when the part is bent, formed or impact-loaded, or when the part sees heat. Pick C12500-H08 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C12500-H02 and C12500-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.