Copper Alloy C87900-M04 vs C87900-M05
Copper Alloy · C87900 temper comparison
C87900-M04 and C87900-M05 are two conditions of the same copper alloy grade, C87900: M04 (as pressure die cast) versus M05 (as plaster cast). The chemistry is identical, so every difference below comes from the condition. C87900-M04 is the stronger of the two: yield strength 240 MPa (34.8 ksi) against 205 MPa (29.7 ksi) for C87900-M05, about 17% more; tensile strength follows at 448 MPa (65 ksi) vs 415 MPa (60.2 ksi). In exchange, C87900-M05 is the more ductile: elongation 18% versus 15% for C87900-M04, and C87900-M04 is harder (125 HB vs 115 HB).
C87900-M04Choose it when strength drives the design.
C87900-M05Choose it when the part is bent, formed or impact-loaded.
C87900-M04 vs C87900-M05: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 821°C1,510 °F · Liquidus Temperature 916°C1,681 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 28 W/m·K16.2 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.2 µm/m·K11.2 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 6.7 % IACS · Electrical Resistivity 2.57×10⁻⁷ Ω·m10.1 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 62 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Same in both: Machinability 78 / 100 · Machinability Rating (AISI 1212 = 100 %) 80% · Weldability 30 / 100 · Castability 90 / 100 · Brazeability / Solderability 78 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 48 MJ/kg20,636 BTU/lb · Embodied Carbon (primary production) 3.2 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 60%
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.
C87900-M04 vs C87900-M05 — frequently asked
Is C87900-M04 stronger than C87900-M05?
Yes. C87900-M04 has a typical yield strength of 240 MPa (34.8 ksi) against 205 MPa (29.7 ksi) for C87900-M05 — about 17% more. Tensile strength is 448 MPa (65 ksi) vs 415 MPa (60.2 ksi).
Which condition does FabDigit quote by default, M04 or M05?
M04 is the default C87900 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.
When should I choose C87900-M04 over C87900-M05?
Pick C87900-M04 when strength drives the design. Pick C87900-M05 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C87900-M04 and C87900-M05 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.