Stainless Steel 1.4594 +AT vs 1.4594 +AT+C (cold drawn)
Stainless Steel · 1.4594 temper comparison
1.4594 +AT and 1.4594 +AT+C (cold drawn) are two conditions of the same stainless steel grade, 1.4594: +AT (solution annealed) versus +AT+C (cold drawn) (solution annealed + cold drawn bar/wire). The chemistry is identical, so every difference below comes from the condition. 1.4594 +AT+C (cold drawn) is the stronger of the two: yield strength 900 MPa (131 ksi) against 795 MPa (115 ksi) for 1.4594 +AT, about 13% more; tensile strength follows at 1,050 MPa (152 ksi) vs 965 MPa (140 ksi). In exchange, 1.4594 +AT is the more ductile: elongation 14% versus 10% for 1.4594 +AT+C (cold drawn), and 1.4594 +AT+C (cold drawn) is harder (31 HRC vs 27 HRC). 1.4594 +AT runs hotter in service (350°C vs 300°C continuous). On the shop floor, 1.4594 +AT welds better (very good vs good).
1.4594 +ATChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4594 +AT+C (cold drawn)Choose it when strength drives the design.
1.4594 +AT vs 1.4594 +AT+C (cold drawn): 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.
1.4594 +AT1.4594 +AT+C (cold drawn)
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 C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.75 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,440°C2,624 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 17 W/m·K9.8 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.6 µm/m·K5.9 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 2.2 % IACS · Electrical Resistivity 8×10⁻⁷ Ω·m31.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 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 45 / 100 · Polishability 80 / 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 kg CO₂/kg · Embodied Water 120 L/kg14.4 gal/lb · Typical Recycled Content 55%
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.
1.4594 +AT vs 1.4594 +AT+C (cold drawn) — frequently asked
Is 1.4594 +AT+C (cold drawn) stronger than 1.4594 +AT?
Yes. 1.4594 +AT+C (cold drawn) has a typical yield strength of 900 MPa (131 ksi) against 795 MPa (115 ksi) for 1.4594 +AT — about 13% more. Tensile strength is 1,050 MPa (152 ksi) vs 965 MPa (140 ksi).
Which condition does FabDigit quote by default, +AT or +AT+C (cold drawn)?
+AT is the default 1.4594 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 welds better, 1.4594 +AT or 1.4594 +AT+C (cold drawn)?
1.4594 +AT. Its weldability rates very good (70/100) against good (60/100) for 1.4594 +AT+C (cold drawn).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4594 +AT and 1.4594 +AT+C (cold drawn) 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.