Stainless Steel 1.4606 +AT vs 1.4606 +P880
Stainless Steel · 1.4606 temper comparison
1.4606 +AT and 1.4606 +P880 are two conditions of the same stainless steel grade, 1.4606: +AT (solution annealed) versus +P880 (solution treated ~880–900 °C + precipitation hardened ~720 °C/16 h). The chemistry is identical, so every difference below comes from the condition. 1.4606 +P880 is the stronger of the two: yield strength 700 MPa (102 ksi) against 300 MPa (43.5 ksi) for 1.4606 +AT, about 133% more; tensile strength follows at 1,010 MPa (146 ksi) vs 690 MPa (100 ksi). In exchange, 1.4606 +AT is the more ductile: elongation 45% versus 20% for 1.4606 +P880, and 1.4606 +P880 is harder (310 HB vs 180 HB). On the shop floor, 1.4606 +AT welds better (good vs fair).
1.4606 +ATChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
1.4606 +P880Choose it when strength drives the design.
1.4606 +AT vs 1.4606 +P880: 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, Vickers
Same in both: Elastic (Young's) Modulus 201 GPa29.2 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 176 GPa25.5 Msi · Poisson's Ratio 0.31 · Compressive Strength 720 MPa104 ksi · Fracture Toughness (K_IC) 110 MPa·√m100 ksi·√in · Hardness, Rockwell C 32 HRC
Physical
Density and transition temperatures.
Same in both: Density 7.94 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,400°C2,552 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 14 W/m·K8.1 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.4 µm/m·K9.1 µin/in·°F · Latent Heat of Fusion 275 J/g118 BTU/lb · Max Service Temperature (continuous) 650°C1,202 °F · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.9 % IACS · Electrical Resistivity 9.1×10⁻⁷ Ω·m35.8 µΩ·in
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: Brazeability / Solderability 50 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 6.5 kg CO₂/kg · Embodied Water 260 L/kg31.2 gal/lb · Typical Recycled Content 30%
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.
1.4606 +AT vs 1.4606 +P880 — frequently asked
Is 1.4606 +P880 stronger than 1.4606 +AT?
Yes. 1.4606 +P880 has a typical yield strength of 700 MPa (102 ksi) against 300 MPa (43.5 ksi) for 1.4606 +AT — about 133% more. Tensile strength is 1,010 MPa (146 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, +AT or +P880?
+P880 is the default 1.4606 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, 1.4606 +AT or 1.4606 +P880?
1.4606 +AT, by a small margin. Both rate poor for machinability — 32/100 against 25/100 for 1.4606 +P880; for welding the order is 1.4606 +AT first (good, 60/100) then 1.4606 +P880 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4606 +AT and 1.4606 +P880 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.