General information:
Alloy type: 1.7225
Main alloying elements: Iron (Fe), chromium (Cr), molybdenum (Mo)
International standard: EN 10083-3
Mechanical properties:
Tensile strength: 900–1100 MPa
Yield strength: 650–850 MPa
Elongation at break: 12–20%
Hardness (Rockwell): 22–30 HRC, hardened and tempered
Modulus of elasticity: 190–210 GPa
Physical properties:
Density: 7.85 g/cm³
Melting point: approx. 1450°C
Thermal conductivity: 42 W/(m·K)
Electrical conductivity: —
Chemical composition, in weight percent:
Carbon (C): 0.38–0.45%
Chromium (Cr): 0.90–1.20%
Molybdenum (Mo): 0.15–0.30%
Manganese (Mn): 0.60–0.90%
Silicon (Si): 0.15–0.40%
Phosphorus (P): max. 0.025%
Sulfur (S): max. 0.035%
Heat treatment:
Alloy 1.7225 can be heat treated in order to improve its mechanical properties. The most common heat treatment conditions are:
Quenching and tempering: Heating to 840–880°C followed by quenching in water or oil.
Tempering: Heating to 540–680°C followed by slow cooling in air.
Corrosion resistance:
Alloy 1.7225 offers good resistance to atmospheric corrosion and moderate resistance to weak acids. It is recommended to protect it from aggressive environments.
Applications:
Alloy 1.7225 is used in various applications, including:
Mechanical engineering: shafts, gears, crankshafts
Automotive industry: transmission components, axles, steering parts
Oil and gas industry: drill bits, connecting parts
General tool manufacturing
Please note that the values stated are guideline values and may vary slightly depending on the manufacturing process and specific production batch. It is recommended to always check the exact specifications provided by the manufacturer.
