Stainless Steel S82121-ANN vs S82121-CD
Stainless Steel · S82121 temper comparison
S82121-ANN and S82121-CD are two conditions of the same stainless steel grade, S82121: ANN (annealed) versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. S82121-CD is the stronger of the two: yield strength 720 MPa (104 ksi) against 530 MPa (76.9 ksi) for S82121-ANN, about 36% more; tensile strength follows at 880 MPa (128 ksi) vs 750 MPa (109 ksi). In exchange, S82121-ANN is the more ductile: elongation 32% versus 18% for S82121-CD, and S82121-CD is harder (270 HB vs 220 HB). S82121-ANN runs hotter in service (300°C vs 250°C continuous).
S82121-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
S82121-CDChoose it when strength drives the design.
S82121-ANN vs S82121-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, 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
Physical
Density and transition temperatures.
Same in both: Density 7.78 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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 15 W/m·K8.7 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 · Latent Heat of Fusion 270 J/g116 BTU/lb · 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 40 / 100 · Brazeability / Solderability 35 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 52 MJ/kg22,356 BTU/lb · Embodied Carbon (primary production) 4 kg CO₂/kg · Embodied Water 150 L/kg18 gal/lb · Typical Recycled Content 70%
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.
S82121-ANN vs S82121-CD — frequently asked
Is S82121-CD stronger than S82121-ANN?
Yes. S82121-CD has a typical yield strength of 720 MPa (104 ksi) against 530 MPa (76.9 ksi) for S82121-ANN — about 36% more. Tensile strength is 880 MPa (128 ksi) vs 750 MPa (109 ksi).
Which condition does FabDigit quote by default, ANN or CD?
ANN is the default S82121 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, S82121-ANN or S82121-CD?
S82121-CD. Its machinability rates fair (38/100) against poor (32/100) for S82121-ANN; for welding the order is S82121-ANN first (very good, 70/100) then S82121-CD (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in S82121-ANN and S82121-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.