Stainless Steel Alloy 803-CD vs Alloy 803-SR
Stainless Steel · Alloy 803 temper comparison
Alloy 803-CD and Alloy 803-SR are two conditions of the same stainless steel grade, Alloy 803: CD (cold drawn) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Alloy 803-CD is the stronger of the two: yield strength 460 MPa (66.7 ksi) against 380 MPa (55.1 ksi) for Alloy 803-SR, about 21% more; tensile strength follows at 720 MPa (104 ksi) vs 660 MPa (95.7 ksi). In exchange, Alloy 803-SR is the more ductile: elongation 32% versus 25% for Alloy 803-CD, and Alloy 803-CD is harder (225 HB vs 200 HB). Alloy 803-SR runs hotter in service (700°C vs 550°C continuous).
Alloy 803-CDChoose it when strength drives the design.
Alloy 803-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Alloy 803-CD vs Alloy 803-SR: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 193 GPa28 Msi · Shear Modulus 74 GPa10.7 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 7.86 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,345°C2,453 °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) 14.8 µm/m·K8.2 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.7 % IACS
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 35 / 100 · Brazeability / Solderability 55 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 7 kg CO₂/kg · Embodied Water 180 L/kg21.6 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.
Alloy 803-CD vs Alloy 803-SR — frequently asked
Is Alloy 803-CD stronger than Alloy 803-SR?
Yes. Alloy 803-CD has a typical yield strength of 460 MPa (66.7 ksi) against 380 MPa (55.1 ksi) for Alloy 803-SR — about 21% more. Tensile strength is 720 MPa (104 ksi) vs 660 MPa (95.7 ksi).
Which condition does FabDigit quote by default, CD or SR?
Annealed is the default Alloy 803 condition in the FabDigit quote flow (neither CD nor 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.
Which welds better, Alloy 803-CD or Alloy 803-SR?
Alloy 803-SR. Its weldability rates good (65/100) against good (58/100) for Alloy 803-CD.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 803-CD and Alloy 803-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.