Copper Alloy C96400-M06 vs C96400-SR
Copper Alloy · C96400 temper comparison
C96400-M06 and C96400-SR are two conditions of the same copper alloy grade, C96400: M06 (as investment cast) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. C96400-M06 is the stronger of the two: yield strength 270 MPa (39.2 ksi) against 250 MPa (36.3 ksi) for C96400-SR, about 8% more. In exchange, C96400-SR is the more ductile: elongation 28% versus 24% for C96400-M06, and C96400-M06 is harder (142 HB vs 132 HB).
C96400-M06Choose it when strength drives the design.
C96400-SRChoose it when the part is bent, formed or impact-loaded.
C96400-M06 vs C96400-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
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 152 GPa22 Msi · Shear Modulus 57 GPa8.3 Msi · Bulk Modulus 149 GPa21.6 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.94 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,171°C2,140 °F · Liquidus Temperature 1,238°C2,260 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 210 J/g90.3 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · 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 65 / 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) 5.5 kg CO₂/kg · Embodied Water 220 L/kg26.4 gal/lb · Typical Recycled Content 35%
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.
C96400-M06 vs C96400-SR — frequently asked
Is C96400-M06 stronger than C96400-SR?
Yes. C96400-M06 has a typical yield strength of 270 MPa (39.2 ksi) against 250 MPa (36.3 ksi) for C96400-SR — about 8% more. Tensile strength is 490 MPa (71.1 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, M06 or SR?
M01 is the default C96400 condition in the FabDigit quote flow (neither M06 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 C96400-M06 over C96400-SR?
Pick C96400-M06 when strength drives the design. Pick C96400-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C96400-M06 and C96400-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.