General information:
Alloy: 1.4438 (also known as X2CrNiMo18-15-4)
Chemical composition: 17-19% chromium, 13-15% nickel, 2-2.5% molybdenum, <0.03% carbon, <2% manganese, <1% silicon, <0.045% phosphorus, <0.015% sulfur, <0.1% nitrogen, balance iron
Standards: EN 10088-3, ASTM A240/A240M, UNS S31703
Mechanical properties:
Tensile strength: 530-730Mpa
Yield strength: ≥ 220Mpa
Elongation at break: ≥ 35%
Hardness: ≤ 220HB
Modulus of elasticity: 200GPa
Physical Properties:
Density: 7.9 g/cm³
Melting point: 1370-1400°C
Thermal conductivity: 15 W/(m K)
Electrical conductivity: 0.75 x 10^6 S/m
Magnetizability: Non-magnetic
Corrosion resistance:
High resistance to corrosive media such as water, seawater, sulphurous compounds, acids (e.g. sulfuric acid, nitric acid) and alkalis (e.g. caustic soda)Suitable for applications in saline environments and marine applicationsGood resistance to pitting corrosion and stress corrosion crackingheat treatment:
Solution heat treatment at 1050-1150°C followed by rapid water or air quenching
Applications:
Chemical industry: pipelines, heat exchangers, valves, containers, reactors
Food industry: tanks, containers, pipelines
Shipbuilding: Components that need to be resistant to salt water
Oil and gas industry: offshore facilities, pipelines
Pharmaceutical industry: tanks, pipelines
Note: This data sheet is for informational purposes only and is based on the information available at the time of writing. It is recommended to check the specific requirements of your application with the appropriate standards and manufacturers.
