Copper Alloy C51100-H04 vs C51100-M20
Copper Alloy · C51100 temper comparison
C51100-H04 and C51100-M20 are two conditions of the same copper alloy grade, C51100: H04 (full hard) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C51100-H04 is the stronger of the two: yield strength 435 MPa (63.1 ksi) against 150 MPa (21.8 ksi) for C51100-M20, about 190% more; tensile strength follows at 470 MPa (68.2 ksi) vs 330 MPa (47.9 ksi). In exchange, C51100-M20 is the more ductile: elongation 45% versus 6% for C51100-H04, and C51100-H04 is harder (150 HB vs 70 HB). C51100-M20 runs hotter in service (200°C vs 150°C continuous).
C51100-H04Choose it when strength drives the design.
C51100-M20Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
C51100-H04 vs C51100-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 110 GPa16 Msi · Shear Modulus 41 GPa5.9 Msi · Bulk Modulus 115 GPa16.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.86 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,060°C1,940 °F · Liquidus Temperature 1,080°C1,976 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 84 W/m·K48.5 BTU/hr·ft·°F · Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.8 µm/m·K9.9 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 20 % IACS · Electrical Resistivity 8.6×10⁻⁸ Ω·m3.39 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 90 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 4 kg CO₂/kg · Embodied Water 320 L/kg38.3 gal/lb · Typical Recycled Content 35%
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.
C51100-H04 vs C51100-M20 — frequently asked
Is C51100-H04 stronger than C51100-M20?
Yes. C51100-H04 has a typical yield strength of 435 MPa (63.1 ksi) against 150 MPa (21.8 ksi) for C51100-M20 — about 190% more. Tensile strength is 470 MPa (68.2 ksi) vs 330 MPa (47.9 ksi).
Which condition does FabDigit quote by default, H04 or M20?
H04 is the default C51100 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 welds better, C51100-H04 or C51100-M20?
C51100-M20. Its weldability rates good (60/100) against good (55/100) for C51100-H04.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C51100-H04 and C51100-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.