Steel 316LSi-AW vs 316LSi-SR
Steel · 316LSi temper comparison
316LSi-AW and 316LSi-SR are two conditions of the same steel grade, 316LSi: AW (as-welded deposit) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. 316LSi-AW is the stronger of the two: yield strength 400 MPa (58 ksi) against 350 MPa (50.8 ksi) for 316LSi-SR, about 14% more. In exchange, 316LSi-SR is the more ductile: elongation 45% versus 40% for 316LSi-AW, and 316LSi-AW is harder (175 HB vs 165 HB).
316LSi-AWChoose it when strength drives the design.
316LSi-SRChoose it when the part is bent, formed or impact-loaded.
316LSi-AW vs 316LSi-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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 195 GPa28.3 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 166 GPa24.1 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.98 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,390°C2,534 °F · Liquidus Temperature 1,440°C2,624 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 15 W/m·K8.7 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 450°C842 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.3 % IACS · Electrical Resistivity 7.5×10⁻⁷ Ω·m29.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.08 V
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 92 / 100 · Castability 60 / 100 · Brazeability / Solderability 65 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 56 MJ/kg24,076 BTU/lb · Embodied Carbon (primary production) 5.2 kg CO₂/kg · Embodied Water 110 L/kg13.2 gal/lb · Typical Recycled Content 70%
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.
316LSi-AW vs 316LSi-SR — frequently asked
Is 316LSi-AW stronger than 316LSi-SR?
Yes. 316LSi-AW has a typical yield strength of 400 MPa (58 ksi) against 350 MPa (50.8 ksi) for 316LSi-SR — about 14% more. Tensile strength is 580 MPa (84.1 ksi) vs 560 MPa (81.2 ksi).
Which condition does FabDigit quote by default, AW or SR?
AW is the default 316LSi 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 316LSi-AW over 316LSi-SR?
Pick 316LSi-AW when strength drives the design. Pick 316LSi-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 316LSi-AW and 316LSi-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.