Copper Alloy C37700-M30 vs C37700-O60
Copper Alloy · C37700 temper comparison
C37700-M30 and C37700-O60 are two conditions of the same copper alloy grade, C37700: M30 (as hot extruded) versus O60 (soft annealed). The chemistry is identical, so every difference below comes from the condition. C37700-M30 is the stronger of the two: yield strength 140 MPa (20.3 ksi) against 115 MPa (16.7 ksi) for C37700-O60, about 22% more; tensile strength follows at 360 MPa (52.2 ksi) vs 340 MPa (49.3 ksi). In exchange, C37700-O60 is the more ductile: elongation 50% versus 45% for C37700-M30, and C37700-M30 is harder (100 HB vs 85 HB).
C37700-M30Choose it when strength drives the design.
C37700-O60Choose it when the part is bent, formed or impact-loaded.
C37700-M30 vs C37700-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.
Elastic (Young's) Modulus
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: Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.44 g/cm³0.3 lb/in³ · Melting Point (Solidus) 885°C1,625 °F · Liquidus Temperature 899°C1,650 °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) 20.8 µm/m·K11.6 µin/in·°F · Latent Heat of Fusion 160 J/g68.8 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -200°C-328 °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) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 25 / 100 · Brazeability / Solderability 88 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C37700-M30 vs C37700-O60 — frequently asked
Is C37700-M30 stronger than C37700-O60?
Yes. C37700-M30 has a typical yield strength of 140 MPa (20.3 ksi) against 115 MPa (16.7 ksi) for C37700-O60 — about 22% more. Tensile strength is 360 MPa (52.2 ksi) vs 340 MPa (49.3 ksi).
Which condition does FabDigit quote by default, M30 or O60?
M30 is the default C37700 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, C37700-M30 or C37700-O60?
C37700-M30, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for C37700-O60.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C37700-M30 and C37700-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.