Copper Alloy C96300-M04 vs C96300-SR
Copper Alloy · C96300 temper comparison
C96300-M04 and C96300-SR are two conditions of the same copper alloy grade, C96300: M04 (as pressure die cast) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. C96300-M04 is the stronger of the two: yield strength 280 MPa (40.6 ksi) against 250 MPa (36.3 ksi) for C96300-SR, about 12% more; tensile strength follows at 480 MPa (69.6 ksi) vs 455 MPa (66 ksi). In exchange, C96300-SR is the more ductile: elongation 22% versus 18% for C96300-M04, and C96300-M04 is harder (145 HB vs 130 HB).
C96300-M04Choose it when strength drives the design.
C96300-SRChoose it when the part is bent, formed or impact-loaded.
C96300-M04 vs C96300-SR: 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
Compressive Strength
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 145 GPa21 Msi · Shear Modulus 55 GPa8 Msi · Bulk Modulus 140 GPa20.3 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.9 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,165°C2,129 °F · Liquidus Temperature 1,205°C2,201 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15.5 µm/m·K8.6 µin/in·°F · Latent Heat of Fusion 210 J/g90.3 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 60 / 100 · Brazeability / Solderability 70 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 78 MJ/kg33,534 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 350 L/kg41.9 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.
C96300-M04 vs C96300-SR — frequently asked
Is C96300-M04 stronger than C96300-SR?
Yes. C96300-M04 has a typical yield strength of 280 MPa (40.6 ksi) against 250 MPa (36.3 ksi) for C96300-SR — about 12% more. Tensile strength is 480 MPa (69.6 ksi) vs 455 MPa (66 ksi).
Which condition does FabDigit quote by default, M04 or SR?
M01 is the default C96300 condition in the FabDigit quote flow (neither M04 nor SR). 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 C96300-M04 over C96300-SR?
Pick C96300-M04 when strength drives the design. Pick C96300-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C96300-M04 and C96300-SR 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.