Copper Alloy C91700-M05 vs C91700-M07
Copper Alloy · C91700 temper comparison
C91700-M05 and C91700-M07 are two conditions of the same copper alloy grade, C91700: M05 (as plaster cast) versus M07 (as continuous cast). The chemistry is identical, so every difference below comes from the condition. C91700-M07 is the stronger of the two: yield strength 207 MPa (30 ksi) against 190 MPa (27.6 ksi) for C91700-M05, about 9% more; tensile strength follows at 345 MPa (50 ksi) vs 325 MPa (47.1 ksi). In exchange, C91700-M05 is the more ductile: elongation 10% versus 8% for C91700-M07.
C91700-M05Choose it when the part is bent, formed or impact-loaded.
C91700-M07Choose it when strength drives the design.
C91700-M05 vs C91700-M07: 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
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.8 g/cm³0.32 lb/in³ · Melting Point (Solidus) 854°C1,569 °F · Liquidus Temperature 1,000°C1,832 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 47 W/m·K27.2 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18 µm/m·K10 µin/in·°F · Latent Heat of Fusion 175 J/g75.2 BTU/lb · Max Service Temperature (continuous) 260°C500 °F · Min Service Temperature -196°C-321 °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) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Weldability 25 / 100 · Castability 75 / 100 · Brazeability / Solderability 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 BTU/lb · Embodied Carbon (primary production) 4.2 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C91700-M05 vs C91700-M07 — frequently asked
Is C91700-M07 stronger than C91700-M05?
Yes. C91700-M07 has a typical yield strength of 207 MPa (30 ksi) against 190 MPa (27.6 ksi) for C91700-M05 — about 9% more. Tensile strength is 345 MPa (50 ksi) vs 325 MPa (47.1 ksi).
Which condition does FabDigit quote by default, M05 or M07?
M01 is the default C91700 condition in the FabDigit quote flow (neither M05 nor M07). 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 C91700-M05 over C91700-M07?
Pick C91700-M05 when the part is bent, formed or impact-loaded. Pick C91700-M07 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C91700-M05 and C91700-M07 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.