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 (megapascals)
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)
Electric conductivity: -
Chemical composition (in percent by weight):
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): 0.025% max.
Sulfur (S): max. 0.035%
Heat treatment:
Alloy 1.7225 can be heat treated to improve mechanical properties. The most common heat treatment conditions are:
Tempering: Heating to 840 - 880 °C and subsequent quenching in water or oil.
Tempering: heating to 540 - 680 °C and subsequent 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 them from aggressive environments.
Applications:
Alloy 1.7225 is used in a variety of applications including:
Mechanical engineering: shafts, gears, crankshafts
Automotive industry: transmission components, axles, steering parts
Oil and gas industry: drill bits, connectors
General tool making
Please note that the values given are indicative and may vary slightly depending on the manufacturing process and specific batch. It is recommended to always check the manufacturer's exact specifications.
