Stainless Steel 1.4558-ANN vs 1.4558-AW
Stainless Steel · 1.4558 temper comparison
1.4558-ANN and 1.4558-AW are two conditions of the same stainless steel grade, 1.4558: ANN (annealed) versus AW (as-welded deposit). The chemistry is identical, so every difference below comes from the condition. 1.4558-AW is the stronger of the two: yield strength 270 MPa (39.2 ksi) against 240 MPa (34.8 ksi) for 1.4558-ANN, about 13% more. In exchange, 1.4558-ANN is the more ductile: elongation 42% versus 30% for 1.4558-AW, and 1.4558-AW is harder (170 HB vs 140 HB).
1.4558-ANNChoose it when the part is bent, formed or impact-loaded.
1.4558-AWChoose it when strength drives the design.
1.4558-ANN vs 1.4558-AW: 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.
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 196 GPa28.4 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.34 · Tensile Strength (Ultimate) 550 MPa79.8 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.94 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,357°C2,475 °F · Liquidus Temperature 1,385°C2,525 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.4 µm/m·K8 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Max Service Temperature (continuous) 800°C1,472 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 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: Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 90 MJ/kg38,693 BTU/lb · Embodied Carbon (primary production) 7 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 45%
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.
1.4558-ANN vs 1.4558-AW — frequently asked
Is 1.4558-AW stronger than 1.4558-ANN?
Yes. 1.4558-AW has a typical yield strength of 270 MPa (39.2 ksi) against 240 MPa (34.8 ksi) for 1.4558-ANN — about 13% more. Tensile strength is 550 MPa (79.8 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, ANN or AW?
ANN is the default 1.4558 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, 1.4558-ANN or 1.4558-AW?
1.4558-ANN, by a small margin. Both rate poor for machinability — 30/100 against 25/100 for 1.4558-AW; for welding the order is 1.4558-ANN first (very good, 80/100) then 1.4558-AW (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4558-ANN and 1.4558-AW 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.