Stainless Steel N08366 1/4H vs N08366-CD
Stainless Steel · N08366 temper comparison
N08366 1/4H and N08366-CD are two conditions of the same stainless steel grade, N08366: 1/4H (quarter hard) versus CD (cold drawn). 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 480 MPa (69.6 ksi) for N08366-CD, about 29% more; tensile strength follows at 860 MPa (125 ksi) vs 760 MPa (110 ksi). In exchange, N08366-CD is the more ductile: elongation 30% versus 20% for N08366 1/4H, and N08366 1/4H is harder (255 HB vs 220 HB). N08366-CD runs hotter in service (350°C vs 300°C continuous).
N08366 1/4HChoose it when strength drives the design.
N08366-CDChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
N08366 1/4H vs N08366-CD: 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.
Elastic (Young's) Modulus
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: 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-CD — frequently asked
Is N08366 1/4H stronger than N08366-CD?
Yes. N08366 1/4H has a typical yield strength of 620 MPa (89.9 ksi) against 480 MPa (69.6 ksi) for N08366-CD — about 29% more. Tensile strength is 860 MPa (125 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, 1/4H or CD?
Annealed is the default N08366 condition in the FabDigit quote flow (neither 1/4H nor CD). 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, N08366 1/4H or N08366-CD?
N08366-CD, by a small margin. Both rate poor for machinability — 25/100 against 20/100 for N08366 1/4H; for welding the order is N08366-CD first (good, 65/100) then N08366 1/4H (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in N08366 1/4H and N08366-CD 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.