Stainless Steel 1.4872 +AT vs 1.4872 +P
Stainless Steel · 1.4872 temper comparison
1.4872 +AT and 1.4872 +P are two conditions of the same stainless steel grade, 1.4872: +AT (solution annealed) versus +P (solution annealed and precipitation hardened). The chemistry is identical, so every difference below comes from the condition. 1.4872 +P is the stronger of the two: yield strength 640 MPa (92.8 ksi) against 400 MPa (58 ksi) for 1.4872 +AT, about 60% more; tensile strength follows at 1,030 MPa (149 ksi) vs 810 MPa (117 ksi). In exchange, 1.4872 +AT is the more ductile: elongation 35% versus 13% for 1.4872 +P, and 1.4872 +P is harder (320 HB vs 240 HB).
1.4872 +ATChoose it when the part is bent, formed or impact-loaded.
1.4872 +PChoose it when strength drives the design.
1.4872 +AT vs 1.4872 +P: 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
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.3 · Shear Strength 650 MPa94.3 ksi · Fatigue Strength (Endurance Limit) 400 MPa58 ksi · Hardness, Vickers 335 HV
Physical
Density and transition temperatures.
Same in both: Density 7.8 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,420°C2,588 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 14.5 W/m·K8.4 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.9 % IACS · Electrical Resistivity 9×10⁻⁷ Ω·m35.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V · Corrosion Resistance 58 / 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 30 / 100 · Castability 40 / 100 · Brazeability / Solderability 45 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 4.8 kg CO₂/kg · Embodied Water 200 L/kg24 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.
1.4872 +AT vs 1.4872 +P — frequently asked
Is 1.4872 +P stronger than 1.4872 +AT?
Yes. 1.4872 +P has a typical yield strength of 640 MPa (92.8 ksi) against 400 MPa (58 ksi) for 1.4872 +AT — about 60% more. Tensile strength is 1,030 MPa (149 ksi) vs 810 MPa (117 ksi).
Which condition does FabDigit quote by default, +AT or +P?
+P is the default 1.4872 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 1.4872 +AT over 1.4872 +P?
Pick 1.4872 +AT when the part is bent, formed or impact-loaded. Pick 1.4872 +P when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4872 +AT and 1.4872 +P 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.