Stainless Steel 430F Annealed vs 430F-QT650
Stainless Steel · 430F temper comparison
430F Annealed and 430F-QT650 are two conditions of the same stainless steel grade, 430F: Annealed versus QT650 (quenched & tempered +QT650). The chemistry is identical, so every difference below comes from the condition. 430F-QT650 is the stronger of the two: yield strength 500 MPa (72.5 ksi) against 380 MPa (55.1 ksi) for 430F Annealed, about 32% more; tensile strength follows at 750 MPa (109 ksi) vs 550 MPa (79.8 ksi). In exchange, 430F Annealed is the more ductile: elongation 25% versus 12% for 430F-QT650, and 430F-QT650 is harder (230 HB vs 175 HB). 430F Annealed runs hotter in service (650°C vs 400°C continuous). On the shop floor, 430F Annealed machines more easily (very good vs good).
430F AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
430F-QT650Choose it when strength drives the design.
430F Annealed 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
Hardness, Rockwell B
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
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 Annealed vs 430F-QT650 — frequently asked
Is 430F-QT650 stronger than 430F Annealed?
Yes. 430F-QT650 has a typical yield strength of 500 MPa (72.5 ksi) against 380 MPa (55.1 ksi) for 430F Annealed — about 32% more. Tensile strength is 750 MPa (109 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, Annealed or QT650?
Annealed is the default 430F 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, 430F Annealed or 430F-QT650?
430F Annealed. Its machinability rates very good (72/100) against good (60/100) for 430F-QT650; for welding the order is 430F Annealed 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 Annealed 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.