Steel H08A Annealed vs H08A CD-Cu
Steel · H08A temper comparison
H08A Annealed and H08A CD-Cu are two conditions of the same steel grade, H08A: Annealed versus CD-Cu (cold drawn, copper-coated welding wire). The chemistry is identical, so every difference below comes from the condition. H08A CD-Cu is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 210 MPa (30.5 ksi) for H08A Annealed, about 148% more; tensile strength follows at 640 MPa (92.8 ksi) vs 370 MPa (53.7 ksi). In exchange, H08A Annealed is the more ductile: elongation 38% versus 9% for H08A CD-Cu, and H08A CD-Cu is harder (195 HB vs 105 HB). H08A Annealed runs hotter in service (400°C vs 300°C continuous). On the shop floor, H08A CD-Cu machines more easily (good vs fair).
H08A AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
H08A CD-CuChoose it when strength drives the design, or when the part is machined in volume.
H08A Annealed vs H08A CD-Cu: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel 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 steel 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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,500°C2,732 °F · Liquidus Temperature 1,525°C2,777 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
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 75 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
H08A Annealed vs H08A CD-Cu — frequently asked
Is H08A CD-Cu stronger than H08A Annealed?
Yes. H08A CD-Cu has a typical yield strength of 520 MPa (75.4 ksi) against 210 MPa (30.5 ksi) for H08A Annealed — about 148% more. Tensile strength is 640 MPa (92.8 ksi) vs 370 MPa (53.7 ksi).
Which condition does FabDigit quote by default, Annealed or CD-Cu?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, H08A Annealed or H08A CD-Cu?
H08A CD-Cu. Its machinability rates good (62/100) against fair (50/100) for H08A Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in H08A Annealed and H08A CD-Cu 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.