Copper Alloy C61800-M30 vs C61800-O60
Copper Alloy · C61800 temper comparison
C61800-M30 and C61800-O60 are two conditions of the same copper alloy grade, C61800: M30 (as hot extruded) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C61800-M30 is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 210 MPa (30.5 ksi) for C61800-O60, about 31% more; tensile strength follows at 585 MPa (84.8 ksi) vs 520 MPa (75.4 ksi). In exchange, C61800-O60 is the more ductile: elongation 40% versus 30% for C61800-M30, and C61800-M30 is harder (170 HB vs 140 HB).
C61800-M30Choose it when strength drives the design.
C61800-O60Choose it when the part is bent, formed or impact-loaded.
C61800-M30 vs C61800-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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 117 GPa17 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.32 · Reduction in Area 35% · Compressive Strength 620 MPa89.9 ksi · Fracture Toughness (K_IC) 55 MPa·√m50.1 ksi·√in · Charpy V-Notch Impact (RT) 30 J22.1 ft·lbf · Hardness, Vickers 180 HV
Physical
Density and transition temperatures.
Same in both: Density 7.58 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,043°C1,909 °F · Liquidus Temperature 1,046°C1,915 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 56 W/m·K32.4 BTU/hr·ft·°F · Specific Heat Capacity 419 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 210 J/g90.3 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 1.33×10⁻⁷ Ω·m5.24 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.31 V · Corrosion Resistance 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 30 / 100 · Weldability 70 / 100 · Castability 55 / 100 · Brazeability / Solderability 30 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.7 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.
C61800-M30 vs C61800-O60 — frequently asked
Is C61800-M30 stronger than C61800-O60?
Yes. C61800-M30 has a typical yield strength of 275 MPa (39.9 ksi) against 210 MPa (30.5 ksi) for C61800-O60 — about 31% more. Tensile strength is 585 MPa (84.8 ksi) vs 520 MPa (75.4 ksi).
Which condition does FabDigit quote by default, M30 or O60?
M30 is the default C61800 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.
When should I choose C61800-M30 over C61800-O60?
Pick C61800-M30 when strength drives the design. Pick C61800-O60 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C61800-M30 and C61800-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.