Copper Alloy C38000-H01 vs C38000-M20
Copper Alloy · C38000 temper comparison
C38000-H01 and C38000-M20 are two conditions of the same copper alloy grade, C38000: H01 (quarter hard) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C38000-H01 is the stronger of the two: yield strength 275 MPa (39.9 ksi) against 140 MPa (20.3 ksi) for C38000-M20, about 96% more; tensile strength follows at 450 MPa (65.3 ksi) vs 380 MPa (55.1 ksi). In exchange, C38000-M20 is the more ductile: elongation 35% versus 20% for C38000-H01, and C38000-H01 is harder (130 HB vs 90 HB). C38000-M20 runs hotter in service (200°C vs 180°C continuous).
C38000-H01Choose it when strength drives the design.
C38000-M20Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C38000-H01 vs C38000-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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 97 GPa14.1 Msi · Shear Modulus 37 GPa5.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.47 g/cm³0.31 lb/in³ · Melting Point (Solidus) 875°C1,607 °F · Liquidus Temperature 890°C1,634 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.9 µm/m·K11.6 µin/in·°F · Latent Heat of Fusion 165 J/g70.9 BTU/lb · 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) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 90% · Weldability 15 / 100 · Brazeability / Solderability 75 / 100 · Polishability 82 / 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 75%
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.
C38000-H01 vs C38000-M20 — frequently asked
Is C38000-H01 stronger than C38000-M20?
Yes. C38000-H01 has a typical yield strength of 275 MPa (39.9 ksi) against 140 MPa (20.3 ksi) for C38000-M20 — about 96% more. Tensile strength is 450 MPa (65.3 ksi) vs 380 MPa (55.1 ksi).
Which condition does FabDigit quote by default, H01 or M20?
M30 is the default C38000 condition in the FabDigit quote flow (neither H01 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.
When should I choose C38000-H01 over C38000-M20?
Pick C38000-H01 when strength drives the design. Pick C38000-M20 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C38000-H01 and C38000-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.