Copper Alloy C83300-M03 vs C83300-M07
Copper Alloy · C83300 temper comparison
C83300-M03 and C83300-M07 are two conditions of the same copper alloy grade, C83300: M03 (as chill cast) versus M07 (as continuous cast). The chemistry is identical, so every difference below comes from the condition. C83300-M07 is the stronger of the two: yield strength 103 MPa (14.9 ksi) against 69 MPa (10 ksi) for C83300-M03, about 49% more; tensile strength follows at 262 MPa (38 ksi) vs 234 MPa (33.9 ksi). In exchange, C83300-M03 is the more ductile: elongation 32% versus 25% for C83300-M07, and C83300-M07 is harder (50 HB vs 35 HB).
C83300-M03Choose it when the part is bent, formed or impact-loaded.
C83300-M07Choose it when strength drives the design.
C83300-M03 vs C83300-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, Vickers
Same in both: Elastic (Young's) Modulus 96.5 GPa14 Msi · Shear Modulus 36 GPa5.2 Msi · Bulk Modulus 105 GPa15.2 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) 1,010°C1,850 °F · Liquidus Temperature 1,055°C1,931 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 145 W/m·K83.8 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 200 J/g86 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 32 % IACS · Electrical Resistivity 5.4×10⁻⁸ Ω·m2.13 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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 30 / 100 · Castability 85 / 100 · Brazeability / Solderability 90 / 100 · Polishability 70 / 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 250 L/kg30 gal/lb · Typical Recycled Content 88%
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.
C83300-M03 vs C83300-M07 — frequently asked
Is C83300-M07 stronger than C83300-M03?
Yes. C83300-M07 has a typical yield strength of 103 MPa (14.9 ksi) against 69 MPa (10 ksi) for C83300-M03 — about 49% more. Tensile strength is 262 MPa (38 ksi) vs 234 MPa (33.9 ksi).
Which condition does FabDigit quote by default, M03 or M07?
M01 is the default C83300 condition in the FabDigit quote flow (neither M03 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 C83300-M03 over C83300-M07?
Pick C83300-M03 when the part is bent, formed or impact-loaded. Pick C83300-M07 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C83300-M03 and C83300-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.