Stainless Steel N08366 1/4H vs N08366 Annealed
Stainless Steel · N08366 temper comparison
N08366 1/4H and N08366 Annealed are two conditions of the same stainless steel grade, N08366: 1/4H (quarter hard) versus Annealed. The chemistry is identical, so every difference below comes from the condition. N08366 1/4H is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 305 MPa (44.2 ksi) for N08366 Annealed, about 103% more; tensile strength follows at 860 MPa (125 ksi) vs 655 MPa (95 ksi). In exchange, N08366 Annealed is the more ductile: elongation 45% versus 20% for N08366 1/4H, and N08366 1/4H is harder (255 HB vs 170 HB). N08366 Annealed runs hotter in service (425°C vs 300°C continuous). On the shop floor, N08366 Annealed welds better (very good vs good).
N08366 1/4HChoose it when strength drives the design.
N08366 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
N08366 1/4H vs N08366 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.
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 196 GPa28.4 Msi · Shear Modulus 76 GPa11 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.08 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,320°C2,408 °F · Liquidus Temperature 1,400°C2,552 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 11.5 W/m·K6.6 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15.3 µm/m·K8.5 µin/in·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.7 % IACS · Electrical Resistivity 1×10⁻⁶ Ω·m39.4 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 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 80 MJ/kg34,394 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 160 L/kg19.2 gal/lb · Typical Recycled Content 45%
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.
N08366 1/4H vs N08366 Annealed — frequently asked
Is N08366 1/4H stronger than N08366 Annealed?
Yes. N08366 1/4H has a typical yield strength of 620 MPa (89.9 ksi) against 305 MPa (44.2 ksi) for N08366 Annealed — about 103% more. Tensile strength is 860 MPa (125 ksi) vs 655 MPa (95 ksi).
Which condition does FabDigit quote by default, 1/4H or Annealed?
Annealed is the default N08366 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 welds better, N08366 1/4H or N08366 Annealed?
N08366 Annealed. Its weldability rates very good (70/100) against good (60/100) for N08366 1/4H.
Ready to make it?
Upload a CAD file and FabDigit prices the part in N08366 1/4H and N08366 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.