Technical Data Sheet: Alloy 1.4724
General information:
Alloy: 1.4724, also known as X10CrAlSi13
Classification: Martensitic stainless steel
Applications: High-temperature applications, heat exchangers, catalytic converters, chemical industry
Chemical composition:
Carbon (C): max. 0.10%
Silicon (Si): 0.30–0.70%
Manganese (Mn): max. 0.50%
Phosphorus (P): max. 0.04%
Sulfur (S): max. 0.03%
Chromium (Cr): 12.00–14.00%
Aluminium (Al): 0.40–1.20%
Physical properties:
Density: 7.80 g/cm³
Melting range: 1420–1460°C
Thermal conductivity: 20–25 W/(m·K)
Electrical conductivity: 15–20% IACS
Mechanical properties:
Tensile strength: 550–700 MPa
Yield strength: 350–550 MPa
Elongation at break: 20–30%
Hardness: 20–25 HRC (Rockwell C)
Heat treatment:
Annealing: Between 750°C and 800°C for 2–4 hours, followed by slow cooling in furnace air.
Corrosion resistance: Alloy 1.4724 offers good resistance to atmospheric corrosion, especially at elevated temperatures. However, it is not suitable for use in aggressive environments with strong acids or chloride ions.
Weldability: Alloy 1.4724 has good weldability. Before welding, however, proper preparation of the weld seam, including preheating and post-treatment, should be ensured in order to avoid unwanted stresses and cracking.
Note: This information is intended as general guidance only and should not be used as the sole basis for design decisions. Before using Alloy 1.4724 in specific applications, it is recommended to obtain more detailed information from manufacturers or technical specialists.
