Copper Alloy C19025-H04 vs C19025-HR08
Copper Alloy · C19025 temper comparison
C19025-H04 and C19025-HR08 are two conditions of the same copper alloy grade, C19025: H04 (full hard) versus HR08 (spring hard and stress relieved). The chemistry is identical, so every difference below comes from the condition. C19025-HR08 is the stronger of the two: yield strength 655 MPa (95 ksi) against 510 MPa (74 ksi) for C19025-H04, about 28% more; tensile strength follows at 680 MPa (98.6 ksi) vs 565 MPa (81.9 ksi). In exchange, C19025-H04 is the more ductile: elongation 6% versus 3% for C19025-HR08, and C19025-HR08 is harder (205 HV vs 175 HV).
C19025-H04Choose it when the part is bent, formed or impact-loaded.
C19025-HR08Choose it when strength drives the design.
C19025-H04 vs C19025-HR08: 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.
Elastic (Young's) Modulus
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: Shear Modulus 47 GPa6.8 Msi · Bulk Modulus 135 GPa19.6 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.9 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,070°C1,958 °F · Liquidus Temperature 1,090°C1,994 °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) 17.5 µm/m·K9.7 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) -0.25 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 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 85 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 3.9 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
C19025-H04 vs C19025-HR08 — frequently asked
Is C19025-HR08 stronger than C19025-H04?
Yes. C19025-HR08 has a typical yield strength of 655 MPa (95 ksi) against 510 MPa (74 ksi) for C19025-H04 — about 28% more. Tensile strength is 680 MPa (98.6 ksi) vs 565 MPa (81.9 ksi).
Which condition does FabDigit quote by default, H04 or HR08?
HR04 is the default C19025 condition in the FabDigit quote flow (neither H04 nor HR08). 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, C19025-H04 or C19025-HR08?
C19025-HR08. Its machinability rates fair (35/100) against poor (30/100) for C19025-H04; for welding the order is C19025-H04 first (fair, 45/100) then C19025-HR08 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C19025-H04 and C19025-HR08 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.