Optimal Mechanical Properties of Structural Steel for the Prevention of Embrittlement

Resumo

With a view to ensuring structural stability of steels and alloys, a system for harmonizing the plasticity, strength, and deformation resistance of structural steels is developed. Principles for the formation of such properties are outlined. Means of controlling the change in these properties are considered. The sensitivity of some characteristics of the metal to changes in others is discussed. The reserves of strength in various structural steels are compared in terms of their ability to resist brittle failure, on the basis of the mechanical stability K_ms and the embrittlement expressed as the deformational strength (fracture resistance) B_r. The quality of structural steels is assessed in terms of their ability to resist embrittlement. The proposed approach here is to assess the quality of structural steels in terms of their deformational strength at specified yield point σ_0.2, which reflects the resistance to embrittlement.