Stainless Steel 660 Cold Drawn vs 660 CW+Aged
Stainless Steel · 660 temper comparison
660 Cold Drawn and 660 CW+Aged are two conditions of the same stainless steel grade, 660: Cold Drawn versus CW+Aged (cold Worked + Aged). The chemistry is identical, so every difference below comes from the condition. 660 CW+Aged is the stronger of the two: yield strength 1,250 MPa (181 ksi) against 700 MPa (102 ksi) for 660 Cold Drawn, about 79% more; tensile strength follows at 1,400 MPa (203 ksi) vs 900 MPa (131 ksi). In exchange, 660 Cold Drawn is the more ductile: elongation 18% versus 6% for 660 CW+Aged, and 660 CW+Aged is harder (410 HB vs 240 HB). 660 CW+Aged runs hotter in service (600°C vs 480°C continuous). On the shop floor, 660 Cold Drawn machines more easily (poor vs not recommended) and 660 Cold Drawn welds better (fair vs poor).
660 Cold DrawnChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
660 CW+AgedChoose it when strength drives the design, or when the part sees heat.
660 Cold Drawn vs 660 CW+Aged: 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.
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 201 GPa29.2 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 176 GPa25.5 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 7.94 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,400°C2,552 °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 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.6 µm/m·K9.2 µin/in·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.9 % IACS · Electrical Resistivity 9.1×10⁻⁷ Ω·m35.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
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 50 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95 MJ/kg40,843 BTU/lb · Embodied Carbon (primary production) 6.8 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 30%
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.
660 Cold Drawn vs 660 CW+Aged — frequently asked
Is 660 CW+Aged stronger than 660 Cold Drawn?
Yes. 660 CW+Aged has a typical yield strength of 1,250 MPa (181 ksi) against 700 MPa (102 ksi) for 660 Cold Drawn — about 79% more. Tensile strength is 1,400 MPa (203 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, Cold Drawn or CW+Aged?
Solution Annealed is the default 660 condition in the FabDigit quote flow (neither Cold Drawn nor CW+Aged). 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, 660 Cold Drawn or 660 CW+Aged?
660 Cold Drawn. Its machinability rates poor (25/100) against not recommended (12/100) for 660 CW+Aged; for welding the order is 660 Cold Drawn first (fair, 45/100) then 660 CW+Aged (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 660 Cold Drawn and 660 CW+Aged 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.