• Robustness: resistance to high temperature
  • Safety: zero risk (health and hygiene)


Steel : Presentation

Steels are non-combustible and have good temperature behaviour, with a melting point higher than 1,500°C, giving them a major advantage over lead. The most common grades are S235 (E24), S275 (E28) and S355 (E36)

Non-alloyed carbon steels have poor resistance to chemical agents and must be protected by a coating, which will also improve their decontaminability.

Steel : Applications

Commonly used for welding and machining, steels are ideal for making shielding screens such as stationary or moving mechanical parts, structural elements, racks and walls.

Steel : Radiation protection properties

They have excellent resistance to gamma radiation.

However, under neutron flux, steels produce capture gamma rays, with energies between 1 and 10 MeV, and activate at highly variable levels depending on the level of impurities (presence of Mn, CO, Ti, etc.).

Under very high neutron flux, the transition temperature (brittle fracture / ductile fracture) also increases.


  • Density: 7.8
  • Melting temperature: 1,500°C to 1,600°C
  • Ultimate tensile strength: 300 to 600 MPa depending on steel grade
  • Elastic modulus: 210,000 MPa at 20°C ; 195,000 MPa at 200°C ; 185,000 MPa at 300°C
  • Ultimate elongation: 18 to 36% depending on steel grade
  • Thermal conductivity: 30 W.m-1.K-1
  • Mass thermal capacity: 470 J.kg-1.K-1
  • Coefficient of linear thermal expansion: 12.1 to 12.6.10-6 K-1 (up to 100°C)
  • Electrical resistivity: 0.18 μΩ.m
  • Poisson's ratio: 0.3
  • Brinell hardness: 100 to 130


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