Stainless Steel Alloy 803 Annealed vs Alloy 803-SR
Stainless Steel · Alloy 803 temper comparison
Alloy 803 Annealed and Alloy 803-SR are two conditions of the same stainless steel grade, Alloy 803: Annealed versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Alloy 803-SR is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 265 MPa (38.4 ksi) for Alloy 803 Annealed, about 43% more; tensile strength follows at 660 MPa (95.7 ksi) vs 585 MPa (84.8 ksi). In exchange, Alloy 803 Annealed is the more ductile: elongation 45% versus 32% for Alloy 803-SR, and Alloy 803-SR is harder (200 HB vs 165 HB). Alloy 803 Annealed runs hotter in service (1,100°C vs 700°C continuous).
Alloy 803 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Alloy 803-SRChoose it when strength drives the design.
Alloy 803 Annealed 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.
Alloy 803 AnnealedAlloy 803-SR
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.
Same in both: Electrical Conductivity 1.7 % IACS · Electrical Resistivity 1.02×10⁻⁶ Ω·m40.2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V · Corrosion Resistance 72 / 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 65 / 100 · 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 Annealed vs Alloy 803-SR — frequently asked
Is Alloy 803-SR stronger than Alloy 803 Annealed?
Yes. Alloy 803-SR has a typical yield strength of 380 MPa (55.1 ksi) against 265 MPa (38.4 ksi) for Alloy 803 Annealed — about 43% more. Tensile strength is 660 MPa (95.7 ksi) vs 585 MPa (84.8 ksi).
Which condition does FabDigit quote by default, Annealed or SR?
Annealed is the default Alloy 803 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 Alloy 803 Annealed over Alloy 803-SR?
Pick Alloy 803 Annealed when the part is bent, formed or impact-loaded, or when the part sees heat. Pick Alloy 803-SR when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 803 Annealed 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.