Stainless Steel S20432-1/4 Hard vs S20432-3/4 Hard
Stainless Steel · S20432 temper comparison
S20432-1/4 Hard and S20432-3/4 Hard are two conditions of the same stainless steel grade, S20432: 1/4 Hard (quarter hard) versus 3/4 Hard (three-quarter hard). The chemistry is identical, so every difference below comes from the condition. S20432-3/4 Hard is the stronger of the two: yield strength 990 MPa (144 ksi) against 620 MPa (89.9 ksi) for S20432-1/4 Hard, about 60% more; tensile strength follows at 1,250 MPa (181 ksi) vs 930 MPa (135 ksi). In exchange, S20432-1/4 Hard is the more ductile: elongation 28% versus 9% for S20432-3/4 Hard, and S20432-3/4 Hard is harder (360 HB vs 195 HB). On the shop floor, S20432-1/4 Hard welds better (good vs fair).
S20432-1/4 HardChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
S20432-3/4 HardChoose it when strength drives the design.
S20432-1/4 Hard vs S20432-3/4 Hard: 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.
S20432-1/4 HardS20432-3/4 Hard
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
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 197 GPa28.6 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 7.8 g/cm³0.28 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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15.7 µm/m·K8.7 µin/in·°F · Latent Heat of Fusion 280 J/g120 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Same in both: Machinability 42 / 100 · Machinability Rating (AISI 1212 = 100 %) 45% · Brazeability / Solderability 60 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 45 MJ/kg19,347 BTU/lb · Embodied Carbon (primary production) 4 kg CO₂/kg · Embodied Water 90 L/kg10.8 gal/lb · Typical Recycled Content 55%
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.
S20432-1/4 Hard vs S20432-3/4 Hard — frequently asked
Is S20432-3/4 Hard stronger than S20432-1/4 Hard?
Yes. S20432-3/4 Hard has a typical yield strength of 990 MPa (144 ksi) against 620 MPa (89.9 ksi) for S20432-1/4 Hard — about 60% more. Tensile strength is 1,250 MPa (181 ksi) vs 930 MPa (135 ksi).
Which condition does FabDigit quote by default, 1/4 Hard or 3/4 Hard?
Annealed is the default S20432 condition in the FabDigit quote flow (neither 1/4 Hard nor 3/4 Hard). 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 welds better, S20432-1/4 Hard or S20432-3/4 Hard?
S20432-1/4 Hard. Its weldability rates good (60/100) against fair (50/100) for S20432-3/4 Hard.
Ready to make it?
Upload a CAD file and FabDigit prices the part in S20432-1/4 Hard and S20432-3/4 Hard 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.