Copper Alloy C18600-H04 vs C18600-TB00
Copper Alloy · C18600 temper comparison
C18600-H04 and C18600-TB00 are two conditions of the same copper alloy grade, C18600: H04 (full hard) versus TB00 (solution heat treated). The chemistry is identical, so every difference below comes from the condition. C18600-H04 is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 95 MPa (13.8 ksi) for C18600-TB00, about 4.0 times as much; tensile strength follows at 420 MPa (60.9 ksi) vs 250 MPa (36.3 ksi). In exchange, C18600-TB00 is the more ductile: elongation 40% versus 6% for C18600-H04, and C18600-H04 is harder (125 HB vs 60 HB). On the shop floor, C18600-H04 machines more easily (25 vs 15 out of 100).
C18600-H04Choose it when strength drives the design, or when the part is machined in volume.
C18600-TB00Choose it when the part is bent, formed or impact-loaded.
C18600-H04 vs C18600-TB00: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 48 GPa7 Msi · Bulk Modulus 138 GPa20 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,070°C1,958 °F · Liquidus Temperature 1,080°C1,976 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 385 J/kg·K0.09 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17 µm/m·K9.4 µin/in·°F · Latent Heat of Fusion 205 J/g88.1 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -200°C-328 °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) -0.22 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 70 / 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) 3.6 kg CO₂/kg · Embodied Water 250 L/kg30 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.
C18600-H04 vs C18600-TB00 — frequently asked
Is C18600-H04 stronger than C18600-TB00?
Yes. C18600-H04 has a typical yield strength of 380 MPa (55.1 ksi) against 95 MPa (13.8 ksi) for C18600-TB00 — about 4.0 times as much. Tensile strength is 420 MPa (60.9 ksi) vs 250 MPa (36.3 ksi).
Which condition does FabDigit quote by default, H04 or TB00?
TM04 is the default C18600 condition in the FabDigit quote flow (neither H04 nor TB00). 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, C18600-H04 or C18600-TB00?
C18600-H04, by a small margin. Both rate poor for machinability — 25/100 against 15/100 for C18600-TB00; for welding the order is C18600-TB00 first (fair, 45/100) then C18600-H04 (fair, 38/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in C18600-H04 and C18600-TB00 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.