Stainless Steel 309 Cold Drawn vs 309 Solution Annealed
Stainless Steel · 309 temper comparison
309 Cold Drawn and 309 Solution Annealed are two conditions of the same stainless steel grade, 309: Cold Drawn versus Solution Annealed. The chemistry is identical, so every difference below comes from the condition. 309 Cold Drawn is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 310 MPa (45 ksi) for 309 Solution Annealed, about 45% more; tensile strength follows at 725 MPa (105 ksi) vs 620 MPa (89.9 ksi). In exchange, 309 Solution Annealed is the more ductile: elongation 45% versus 30% for 309 Cold Drawn, and 309 Cold Drawn is harder (200 HB vs 165 HB).
309 Cold DrawnChoose it when strength drives the design.
309 Solution AnnealedChoose it when the part is bent, formed or impact-loaded.
309 Cold Drawn vs 309 Solution Annealed: 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.
309 Cold Drawn309 Solution Annealed
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
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 150 GPa21.8 Msi · Poisson's Ratio 0.28 · Shear Strength 420 MPa60.9 ksi · Fracture Toughness (K_IC) 200 MPa·√m182 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.9 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 15.6 W/m·K9 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.9 µm/m·K8.3 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 1,050°C1,922 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.2 % IACS · Electrical Resistivity 7.8×10⁻⁷ Ω·m30.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.08 V · Corrosion Resistance 66 / 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 70 / 100 · Castability 55 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 56 MJ/kg24,076 BTU/lb · Embodied Carbon (primary production) 6 kg CO₂/kg · Embodied Water 150 L/kg18 gal/lb · Typical Recycled Content 60%
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.
309 Cold Drawn vs 309 Solution Annealed — frequently asked
Is 309 Cold Drawn stronger than 309 Solution Annealed?
Yes. 309 Cold Drawn has a typical yield strength of 450 MPa (65.3 ksi) against 310 MPa (45 ksi) for 309 Solution Annealed — about 45% more. Tensile strength is 725 MPa (105 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, Cold Drawn or Solution Annealed?
Solution Annealed is the default 309 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.
When should I choose 309 Cold Drawn over 309 Solution Annealed?
Pick 309 Cold Drawn when strength drives the design. Pick 309 Solution Annealed when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 309 Cold Drawn and 309 Solution Annealed 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.