Stainless Steel S31100 Annealed vs S31100-CD
Stainless Steel · S31100 temper comparison
S31100 Annealed and S31100-CD are two conditions of the same stainless steel grade, S31100: Annealed versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. S31100-CD is the stronger of the two: yield strength 700 MPa (102 ksi) against 500 MPa (72.5 ksi) for S31100 Annealed, about 40% more; tensile strength follows at 880 MPa (128 ksi) vs 760 MPa (110 ksi). In exchange, S31100 Annealed is the more ductile: elongation 30% versus 20% for S31100-CD, and S31100-CD is harder (285 HB vs 240 HB).
S31100 AnnealedChoose it when the part is bent, formed or impact-loaded.
S31100-CDChoose it when strength drives the design.
S31100 Annealed vs S31100-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 C
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 0.3 · Hardness, Rockwell B 99 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.75 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.
Same in both: Thermal Conductivity 15.5 W/m·K9 BTU/hr·ft·°F · Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13 µm/m·K7.2 µin/in·°F · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.2 % IACS · Electrical Resistivity 8×10⁻⁷ Ω·m31.5 µΩ·in
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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 50 / 100 · Brazeability / Solderability 40 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 180 L/kg21.6 gal/lb · Typical Recycled Content 65%
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.
S31100 Annealed vs S31100-CD — frequently asked
Is S31100-CD stronger than S31100 Annealed?
Yes. S31100-CD has a typical yield strength of 700 MPa (102 ksi) against 500 MPa (72.5 ksi) for S31100 Annealed — about 40% more. Tensile strength is 880 MPa (128 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, Annealed or CD?
Annealed is the default S31100 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.
When should I choose S31100 Annealed over S31100-CD?
Pick S31100 Annealed when the part is bent, formed or impact-loaded. Pick S31100-CD when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in S31100 Annealed and S31100-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.