Copper Alloy C97300-M03 vs C97300-M05
Copper Alloy · C97300 temper comparison
C97300-M03 and C97300-M05 are two conditions of the same copper alloy grade, C97300: M03 (as chill cast) versus M05 (as plaster cast). The chemistry is identical, so every difference below comes from the condition. C97300-M03 is the stronger of the two: yield strength 128 MPa (18.6 ksi) against 117 MPa (17 ksi) for C97300-M05, about 9% more; tensile strength follows at 255 MPa (37 ksi) vs 235 MPa (34.1 ksi). C97300-M03 is harder — 60 HB against 55 HB for C97300-M05 — which matters for wear surfaces and threads.
C97300-M03Choose it when strength drives the design, or when surface hardness matters.
C97300-M03 vs C97300-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
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 103 GPa14.9 Msi · Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 107 GPa15.5 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.95 g/cm³0.32 lb/in³ · Melting Point (Solidus) 880°C1,616 °F · Liquidus Temperature 1,040°C1,904 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 29 W/m·K16.8 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 175 J/g75.2 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 % IACS · Electrical Resistivity 2.87×10⁻⁷ Ω·m11.3 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 78 / 100 · Machinability Rating (AISI 1212 = 100 %) 70% · Weldability 15 / 100 · Formability (cold) 8 / 100 · Castability 85 / 100 · Brazeability / Solderability 70 / 100 · Polishability 78 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 340 L/kg40.7 gal/lb · Typical Recycled Content 70%
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.
C97300-M03 vs C97300-M05 — frequently asked
Is C97300-M03 stronger than C97300-M05?
Yes. C97300-M03 has a typical yield strength of 128 MPa (18.6 ksi) against 117 MPa (17 ksi) for C97300-M05 — about 9% more. Tensile strength is 255 MPa (37 ksi) vs 235 MPa (34.1 ksi).
Which condition does FabDigit quote by default, M03 or M05?
M01 is the default C97300 condition in the FabDigit quote flow (neither M03 nor M05). 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 C97300-M03 over C97300-M05?
Pick C97300-M03 when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C97300-M03 and C97300-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.