Steel FDC-ANN vs FDC CD-SR
Steel · FDC temper comparison
FDC-ANN and FDC CD-SR are two conditions of the same steel grade, FDC: ANN (annealed) versus CD-SR (cold drawn + stress relieved). The chemistry is identical, so every difference below comes from the condition. FDC CD-SR is the stronger of the two: yield strength 1,450 MPa (210 ksi) against 390 MPa (56.6 ksi) for FDC-ANN, about 3.7 times as much; tensile strength follows at 1,620 MPa (235 ksi) vs 640 MPa (92.8 ksi). In exchange, FDC-ANN is the more ductile: elongation 22% versus 3.5% for FDC CD-SR.
FDC-ANNChoose it when the part is bent, formed or impact-loaded.
FDC CD-SRChoose it when strength drives the design.
FDC-ANN vs FDC CD-SR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all 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 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)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 207 GPa30 Msi · Shear Modulus 79.3 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 47 W/m·K27.2 BTU/hr·ft·°F · Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.5 µm/m·K6.9 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 9 % IACS · Electrical Resistivity 1.9×10⁻⁷ Ω·m7.48 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 20 / 100 · Brazeability / Solderability 45 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
FDC-ANN vs FDC CD-SR — frequently asked
Is FDC CD-SR stronger than FDC-ANN?
Yes. FDC CD-SR has a typical yield strength of 1,450 MPa (210 ksi) against 390 MPa (56.6 ksi) for FDC-ANN — about 3.7 times as much. Tensile strength is 1,620 MPa (235 ksi) vs 640 MPa (92.8 ksi).
Which condition does FabDigit quote by default, ANN or CD-SR?
CD is the default FDC condition in the FabDigit quote flow (neither ANN nor CD-SR). 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 FDC-ANN over FDC CD-SR?
Pick FDC-ANN when the part is bent, formed or impact-loaded. Pick FDC CD-SR when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in FDC-ANN and FDC CD-SR 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.