Copper Alloy C72800-H08 vs C72800-TH04
Copper Alloy · C72800 temper comparison
C72800-H08 and C72800-TH04 are two conditions of the same copper alloy grade, C72800: H08 (spring hard) versus TH04 (TD04 and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. C72800-TH04 is the stronger of the two: yield strength 1,080 MPa (157 ksi) against 880 MPa (128 ksi) for C72800-H08, about 23% more; tensile strength follows at 1,140 MPa (165 ksi) vs 930 MPa (135 ksi). C72800-TH04 is the more ductile: elongation 5% versus 3% for C72800-H08, and C72800-TH04 is harder (36 HRC vs 26 HRC). C72800-TH04 runs hotter in service (200°C vs 150°C continuous) and C72800-TH04 conducts electricity better (8.5 % IACS vs 7.5 % IACS).
C72800-TH04Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
C72800-H08 vs C72800-TH04: 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, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 51 GPa7.4 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.3 · Reduction in Area 25% · Charpy V-Notch Impact (RT) 20 J14.8 ft·lbf · Hardness, Brinell 285 HB
Physical
Density and transition temperatures.
Same in both: Density 8.86 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,030°C1,886 °F · Liquidus Temperature 1,090°C1,994 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 35 W/m·K20.2 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.5 µm/m·K9.2 µin/in·°F · Latent Heat of Fusion 190 J/g81.7 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 2.16×10⁻⁷ Ω·m8.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 74 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 35 / 100 · Weldability 40 / 100 · Castability 45 / 100 · Brazeability / Solderability 65 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 72 MJ/kg30,954 BTU/lb · Embodied Carbon (primary production) 5.2 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 20%
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.
C72800-H08 vs C72800-TH04 — frequently asked
Is C72800-TH04 stronger than C72800-H08?
Yes. C72800-TH04 has a typical yield strength of 1,080 MPa (157 ksi) against 880 MPa (128 ksi) for C72800-H08 — about 23% more. Tensile strength is 1,140 MPa (165 ksi) vs 930 MPa (135 ksi).
Which condition does FabDigit quote by default, H08 or TH04?
TF00 is the default C72800 condition in the FabDigit quote flow (neither H08 nor TH04). 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 C72800-H08 over C72800-TH04?
Pick C72800-TH04 when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C72800-H08 and C72800-TH04 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.