Copper Alloy C85900-M01 vs C85900-M05
Copper Alloy · C85900 temper comparison
C85900-M01 and C85900-M05 are two conditions of the same copper alloy grade, C85900: M01 (as sand cast) versus M05 (as plaster cast). The chemistry is identical, so every difference below comes from the condition. C85900-M05 is the stronger of the two: yield strength 130 MPa (18.9 ksi) against 115 MPa (16.7 ksi) for C85900-M01, about 13% more; tensile strength follows at 320 MPa (46.4 ksi) vs 290 MPa (42.1 ksi). In exchange, C85900-M01 is the more ductile: elongation 25% versus 22% for C85900-M05, and C85900-M05 is harder (68 HB vs 60 HB).
C85900-M01Choose it when the part is bent, formed or impact-loaded.
C85900-M05Choose it when strength drives the design.
C85900-M01 vs C85900-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 97 GPa14.1 Msi · Shear Modulus 37 GPa5.4 Msi · Bulk Modulus 101 GPa14.6 Msi · Poisson's Ratio 0.34 · Charpy V-Notch Impact (RT) 25 J18.4 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 8.4 g/cm³0.3 lb/in³ · Melting Point (Solidus) 875°C1,607 °F · Liquidus Temperature 930°C1,706 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 85 W/m·K49.1 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 21 µm/m·K11.7 µin/in·°F · Latent Heat of Fusion 165 J/g70.9 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 26 % IACS · Electrical Resistivity 6.6×10⁻⁸ Ω·m2.6 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.
Same in both: Machinability 80 / 100 · Machinability Rating (AISI 1212 = 100 %) 80% · Weldability 30 / 100 · Formability (cold) 10 / 100 · Castability 85 / 100 · Brazeability / Solderability 85 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 45 MJ/kg19,347 BTU/lb · Embodied Carbon (primary production) 3.2 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 90%
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.
C85900-M01 vs C85900-M05 — frequently asked
Is C85900-M05 stronger than C85900-M01?
Yes. C85900-M05 has a typical yield strength of 130 MPa (18.9 ksi) against 115 MPa (16.7 ksi) for C85900-M01 — about 13% more. Tensile strength is 320 MPa (46.4 ksi) vs 290 MPa (42.1 ksi).
Which condition does FabDigit quote by default, M01 or M05?
M01 is the default C85900 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 C85900-M01 over C85900-M05?
Pick C85900-M01 when the part is bent, formed or impact-loaded. Pick C85900-M05 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C85900-M01 and C85900-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.