Copper Alloy C69430-M30 vs C69430-O60
Copper Alloy · C69430 temper comparison
C69430-M30 and C69430-O60 are two conditions of the same copper alloy grade, C69430: M30 (as hot extruded) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C69430-M30 is the stronger of the two: yield strength 240 MPa (34.8 ksi) against 195 MPa (28.3 ksi) for C69430-O60, about 23% more; tensile strength follows at 515 MPa (74.7 ksi) vs 450 MPa (65.3 ksi). In exchange, C69430-O60 is the more ductile: elongation 38% versus 30% for C69430-M30, and C69430-M30 is harder (140 HB vs 110 HB).
C69430-M30Choose it when strength drives the design.
C69430-O60Choose it when the part is bent, formed or impact-loaded.
C69430-M30 vs C69430-O60: 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
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 107 GPa15.5 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) 820°C1,508 °F · Liquidus Temperature 916°C1,681 °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) 20.2 µm/m·K11.2 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Max Service Temperature (continuous) 200°C392 °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) -0.26 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: Brazeability / Solderability 80 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 250 L/kg30 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.
C69430-M30 vs C69430-O60 — frequently asked
Is C69430-M30 stronger than C69430-O60?
Yes. C69430-M30 has a typical yield strength of 240 MPa (34.8 ksi) against 195 MPa (28.3 ksi) for C69430-O60 — about 23% more. Tensile strength is 515 MPa (74.7 ksi) vs 450 MPa (65.3 ksi).
Which condition does FabDigit quote by default, M30 or O60?
M30 is the default C69430 condition in the FabDigit quote flow. 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 is easier to machine, C69430-M30 or C69430-O60?
C69430-M30, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for C69430-O60.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C69430-M30 and C69430-O60 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.