Copper Alloy C67400-M20 vs C67400-M30
Copper Alloy · C67400 temper comparison
C67400-M20 and C67400-M30 are two conditions of the same copper alloy grade, C67400: M20 (as hot rolled) versus M30 (as hot extruded). The chemistry is identical, so every difference below comes from the condition. C67400-M30 is the stronger of the two: yield strength 331 MPa (48 ksi) against 305 MPa (44.2 ksi) for C67400-M20, about 9% more; tensile strength follows at 655 MPa (95 ksi) vs 620 MPa (89.9 ksi). In exchange, C67400-M20 is the more ductile: elongation 24% versus 20% for C67400-M30, and C67400-M30 is harder (185 HB vs 170 HB).
C67400-M20Choose it when the part is bent, formed or impact-loaded.
C67400-M30Choose it when strength drives the design.
C67400-M20 vs C67400-M30: 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 105 GPa15.2 Msi · 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 8.36 g/cm³0.3 lb/in³ · Melting Point (Solidus) 862°C1,584 °F · Liquidus Temperature 880°C1,616 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 40 W/m·K23.1 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 21 µm/m·K11.7 µin/in·°F · Latent Heat of Fusion 170 J/g73.1 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8 % IACS · Electrical Resistivity 2.15×10⁻⁷ Ω·m8.46 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.27 V · Corrosion Resistance 65 / 100
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 35 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 3.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C67400-M20 vs C67400-M30 — frequently asked
Is C67400-M30 stronger than C67400-M20?
Yes. C67400-M30 has a typical yield strength of 331 MPa (48 ksi) against 305 MPa (44.2 ksi) for C67400-M20 — about 9% more. Tensile strength is 655 MPa (95 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, M20 or M30?
M30 is the default C67400 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 C67400-M20 over C67400-M30?
Pick C67400-M20 when the part is bent, formed or impact-loaded. Pick C67400-M30 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C67400-M20 and C67400-M30 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.