Stainless Steel 430F Cold Drawn vs 430F-QT650
Stainless Steel · 430F temper comparison
430F Cold Drawn and 430F-QT650 are two conditions of the same stainless steel grade, 430F: Cold Drawn versus QT650 (quenched & tempered +QT650). The chemistry is identical, so every difference below comes from the condition. 430F Cold Drawn is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 500 MPa (72.5 ksi) for 430F-QT650, about 10% more. 430F Cold Drawn is the more ductile: elongation 15% versus 12% for 430F-QT650. 430F Cold Drawn runs hotter in service (650°C vs 400°C continuous). On the shop floor, 430F Cold Drawn machines more easily (very good vs good).
430F Cold DrawnChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
430F Cold Drawn vs 430F-QT650: 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
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.28 · Hardness, Rockwell B 99 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.7 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °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) 10.4 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 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 45 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 50 MJ/kg21,496 BTU/lb · Embodied Carbon (primary production) 3.2 kg CO₂/kg · Embodied Water 120 L/kg14.4 gal/lb · Typical Recycled Content 70%
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.
430F Cold Drawn vs 430F-QT650 — frequently asked
Is 430F Cold Drawn stronger than 430F-QT650?
Yes. 430F Cold Drawn has a typical yield strength of 550 MPa (79.8 ksi) against 500 MPa (72.5 ksi) for 430F-QT650 — about 10% more. Tensile strength is 660 MPa (95.7 ksi) vs 750 MPa (109 ksi).
Which condition does FabDigit quote by default, Cold Drawn or QT650?
Annealed is the default 430F condition in the FabDigit quote flow (neither Cold Drawn nor QT650). 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, 430F Cold Drawn or 430F-QT650?
430F Cold Drawn. Its machinability rates very good (76/100) against good (60/100) for 430F-QT650; for welding the order is 430F Cold Drawn first (poor, 20/100) then 430F-QT650 (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 430F Cold Drawn and 430F-QT650 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.