Copper Alloy C87400-M02 vs C87400-M07
Copper Alloy · C87400 temper comparison
C87400-M02 and C87400-M07 are two conditions of the same copper alloy grade, C87400: M02 (as centrifugally cast) versus M07 (as continuous cast). The chemistry is identical, so every difference below comes from the condition. C87400-M07 is the stronger of the two: yield strength 205 MPa (29.7 ksi) against 180 MPa (26.1 ksi) for C87400-M02, about 14% more. In exchange, C87400-M02 is the more ductile: elongation 26% versus 20% for C87400-M07, and C87400-M07 is harder (85 HB vs 75 HB). On the shop floor, C87400-M02 welds better (very good vs good).
C87400-M02Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C87400-M07Choose it when strength drives the design.
C87400-M02 vs C87400-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 100 GPa14.5 Msi · Shear Modulus 37 GPa5.4 Msi · Bulk Modulus 104 GPa15.1 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 917°C1,683 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 28.5 W/m·K16.5 BTU/hr·ft·°F · Specific Heat Capacity 376 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19.6 µm/m·K10.9 µin/in·°F · Latent Heat of Fusion 195 J/g83.8 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -196°C-321 °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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.26 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 85 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3.5 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 75%
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.
C87400-M02 vs C87400-M07 — frequently asked
Is C87400-M07 stronger than C87400-M02?
Yes. C87400-M07 has a typical yield strength of 205 MPa (29.7 ksi) against 180 MPa (26.1 ksi) for C87400-M02 — about 14% more. Tensile strength is 415 MPa (60.2 ksi) vs 400 MPa (58 ksi).
Which condition does FabDigit quote by default, M02 or M07?
M01 is the default C87400 condition in the FabDigit quote flow (neither M02 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.
Which welds better, C87400-M02 or C87400-M07?
C87400-M02. Its weldability rates very good (75/100) against good (60/100) for C87400-M07.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C87400-M02 and C87400-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.