Copper Alloy C67400-H02 vs C67400-M20
Copper Alloy · C67400 temper comparison
C67400-H02 and C67400-M20 are two conditions of the same copper alloy grade, C67400: H02 (half hard) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C67400-H02 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 305 MPa (44.2 ksi) for C67400-M20, about 48% more; tensile strength follows at 725 MPa (105 ksi) vs 620 MPa (89.9 ksi). In exchange, C67400-M20 is the more ductile: elongation 24% versus 15% for C67400-H02, and C67400-H02 is harder (200 HB vs 170 HB).
C67400-H02Choose it when strength drives the design.
C67400-M20Choose it when the part is bent, formed or impact-loaded.
C67400-H02 vs C67400-M20: 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-H02 vs C67400-M20 — frequently asked
Is C67400-H02 stronger than C67400-M20?
Yes. C67400-H02 has a typical yield strength of 450 MPa (65.3 ksi) against 305 MPa (44.2 ksi) for C67400-M20 — about 48% more. Tensile strength is 725 MPa (105 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, H02 or M20?
M30 is the default C67400 condition in the FabDigit quote flow (neither H02 nor M20). 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, C67400-H02 or C67400-M20?
C67400-H02, by a small margin. Both rate poor for machinability — 32/100 against 26/100 for C67400-M20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C67400-H02 and C67400-M20 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.