Copper Alloy C19700-H04 vs C19700-H08
Copper Alloy · C19700 temper comparison
C19700-H04 and C19700-H08 are two conditions of the same copper alloy grade, C19700: H04 (full hard) versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. C19700-H08 is the stronger of the two: yield strength 455 MPa (66 ksi) against 385 MPa (55.8 ksi) for C19700-H04, about 18% more; tensile strength follows at 480 MPa (69.6 ksi) vs 415 MPa (60.2 ksi). In exchange, C19700-H04 is the more ductile: elongation 6% versus 3% for C19700-H08, and C19700-H08 is harder (152 HV vs 130 HV).
C19700-H04Choose it when the part is bent, formed or impact-loaded.
C19700-H08Choose it when strength drives the design.
C19700-H04 vs C19700-H08: 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, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 120 GPa17.4 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 138 GPa20 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,075°C1,967 °F · Liquidus Temperature 1,085°C1,985 °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 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.6 µm/m·K9.8 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 V · Corrosion Resistance 58 / 100
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 %) 20% · Weldability 45 / 100 · Brazeability / Solderability 95 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 30%
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.
C19700-H04 vs C19700-H08 — frequently asked
Is C19700-H08 stronger than C19700-H04?
Yes. C19700-H08 has a typical yield strength of 455 MPa (66 ksi) against 385 MPa (55.8 ksi) for C19700-H04 — about 18% more. Tensile strength is 480 MPa (69.6 ksi) vs 415 MPa (60.2 ksi).
Which condition does FabDigit quote by default, H04 or H08?
H04 is the default C19700 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 C19700-H04 over C19700-H08?
Pick C19700-H04 when the part is bent, formed or impact-loaded. Pick C19700-H08 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C19700-H04 and C19700-H08 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.