Stainless Steel S33550-ANN vs S33550-CD
Stainless Steel · S33550 temper comparison
S33550-ANN and S33550-CD are two conditions of the same stainless steel grade, S33550: ANN (annealed) versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. S33550-CD is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 310 MPa (45 ksi) for S33550-ANN, about 77% more; tensile strength follows at 830 MPa (120 ksi) vs 690 MPa (100 ksi). In exchange, S33550-ANN is the more ductile: elongation 45% versus 25% for S33550-CD, and S33550-CD is harder (240 HB vs 170 HB).
S33550-ANNChoose it when the part is bent, formed or impact-loaded.
S33550-CDChoose it when strength drives the design.
S33550-ANN vs S33550-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
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 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.14 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F · Liquidus Temperature 1,400°C2,552 °F
Thermal
How each material carries heat and how hot it can run.
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) 14.4 µm/m·K8 µin/in·°F · Max Service Temperature (continuous) 1,150°C2,102 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.5 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
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 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 115 MJ/kg49,441 BTU/lb · Embodied Carbon (primary production) 8.5 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 40%
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.
S33550-ANN vs S33550-CD — frequently asked
Is S33550-CD stronger than S33550-ANN?
Yes. S33550-CD has a typical yield strength of 550 MPa (79.8 ksi) against 310 MPa (45 ksi) for S33550-ANN — about 77% more. Tensile strength is 830 MPa (120 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, ANN or CD?
ANN is the default S33550 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, S33550-ANN or S33550-CD?
S33550-CD, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for S33550-ANN; for welding the order is S33550-ANN first (very good, 75/100) then S33550-CD (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in S33550-ANN and S33550-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.