Stainless Steel 304Cu Annealed vs 304Cu Cold Drawn
Stainless Steel · 304Cu temper comparison
304Cu Annealed and 304Cu Cold Drawn are two conditions of the same stainless steel grade, 304Cu: Annealed versus Cold Drawn. The chemistry is identical, so every difference below comes from the condition. 304Cu Cold Drawn is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 210 MPa (30.5 ksi) for 304Cu Annealed, about 148% more; tensile strength follows at 700 MPa (102 ksi) vs 500 MPa (72.5 ksi). In exchange, 304Cu Annealed is the more ductile: elongation 55% versus 22% for 304Cu Cold Drawn, and 304Cu Cold Drawn is harder (210 HB vs 145 HB).
304Cu AnnealedChoose it when the part is bent, formed or impact-loaded.
304Cu Cold DrawnChoose it when strength drives the design.
304Cu Annealed vs 304Cu Cold Drawn: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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.
304Cu Annealed304Cu Cold Drawn
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 193 GPa28 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Shear Strength 360 MPa52.2 ksi · Hardness, Vickers 155 HV
Physical
Density and transition temperatures.
Same in both: Density 7.93 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,440°C2,624 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 16.2 W/m·K9.4 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.3 µm/m·K9.6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 750°C1,382 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.4 % IACS · Electrical Resistivity 7.2×10⁻⁷ Ω·m28.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 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 72 / 100 · Brazeability / Solderability 70 / 100 · Polishability 82 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 65%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
304Cu Annealed vs 304Cu Cold Drawn — frequently asked
Is 304Cu Cold Drawn stronger than 304Cu Annealed?
Yes. 304Cu Cold Drawn has a typical yield strength of 520 MPa (75.4 ksi) against 210 MPa (30.5 ksi) for 304Cu Annealed — about 148% more. Tensile strength is 700 MPa (102 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, Annealed or Cold Drawn?
Annealed is the default 304Cu 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, 304Cu Annealed or 304Cu Cold Drawn?
304Cu Cold Drawn, by a small margin. Both rate fair for machinability — 50/100 against 42/100 for 304Cu Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 304Cu Annealed and 304Cu Cold Drawn 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.