Copper Alloy C69700-H04 vs C69700-M20
Copper Alloy · C69700 temper comparison
C69700-H04 and C69700-M20 are two conditions of the same copper alloy grade, C69700: H04 (full hard) versus M20 (as hot rolled). The chemistry is identical, so every difference below comes from the condition. C69700-H04 is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 240 MPa (34.8 ksi) for C69700-M20, about 117% more; tensile strength follows at 690 MPa (100 ksi) vs 485 MPa (70.3 ksi). In exchange, C69700-M20 is the more ductile: elongation 28% versus 8% for C69700-H04, and C69700-H04 is harder (185 HB vs 120 HB).
C69700-H04Choose it when strength drives the design.
C69700-M20Choose it when the part is bent, formed or impact-loaded.
C69700-H04 vs C69700-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)
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 · Charpy V-Notch Impact (RT) 30 J22.1 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 820°C1,508 °F · Liquidus Temperature 900°C1,652 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 33 W/m·K19.1 BTU/hr·ft·°F · Specific Heat Capacity 380 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.5 µm/m·K11.4 µin/in·°F · Latent Heat of Fusion 175 J/g75.2 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 6.5 % IACS · Electrical Resistivity 2.65×10⁻⁷ Ω·m10.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 62 / 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 25 / 100 · Brazeability / Solderability 70 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 45 MJ/kg19,347 BTU/lb · Embodied Carbon (primary production) 2.9 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.
C69700-H04 vs C69700-M20 — frequently asked
Is C69700-H04 stronger than C69700-M20?
Yes. C69700-H04 has a typical yield strength of 520 MPa (75.4 ksi) against 240 MPa (34.8 ksi) for C69700-M20 — about 117% more. Tensile strength is 690 MPa (100 ksi) vs 485 MPa (70.3 ksi).
Which condition does FabDigit quote by default, H04 or M20?
M20 is the default C69700 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, C69700-H04 or C69700-M20?
C69700-H04, by a small margin. Both rate very good for machinability — 78/100 against 72/100 for C69700-M20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C69700-H04 and C69700-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.