Stainless Steel 1.4558-ANN vs 1.4558-SA1150
Stainless Steel · 1.4558 temper comparison
1.4558-ANN and 1.4558-SA1150 are two conditions of the same stainless steel grade, 1.4558: ANN (annealed) versus SA1150 (high-temperature solution annealed). The chemistry is identical, so every difference below comes from the condition. 1.4558-ANN is the stronger of the two: yield strength 240 MPa (34.8 ksi) against 195 MPa (28.3 ksi) for 1.4558-SA1150, about 23% more; tensile strength follows at 550 MPa (79.8 ksi) vs 510 MPa (74 ksi). 1.4558-ANN is harder — 140 HB against 120 HB for 1.4558-SA1150 — which matters for wear surfaces and threads. 1.4558-SA1150 runs hotter in service (1,000°C vs 800°C continuous).
1.4558-ANNChoose it when strength drives the design, or when surface hardness matters.
1.4558-SA1150Choose it when the part sees heat.
1.4558-ANN vs 1.4558-SA1150: 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.
Elastic (Young's) Modulus
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: Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.34
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.
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) 14.4 µm/m·K8 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 9.9×10⁻⁷ Ω·m39 µΩ·in
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-SA1150 — frequently asked
Is 1.4558-ANN stronger than 1.4558-SA1150?
Yes. 1.4558-ANN has a typical yield strength of 240 MPa (34.8 ksi) against 195 MPa (28.3 ksi) for 1.4558-SA1150 — about 23% more. Tensile strength is 550 MPa (79.8 ksi) vs 510 MPa (74 ksi).
Which condition does FabDigit quote by default, ANN or SA1150?
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.
When should I choose 1.4558-ANN over 1.4558-SA1150?
Pick 1.4558-ANN when strength drives the design, or when surface hardness matters. Pick 1.4558-SA1150 when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4558-ANN and 1.4558-SA1150 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.