Some dynamic characteristics of steel for gas pipelines

In the production of gas pipelines steels of a very high specification are required. Efforts are directed towards combining high strengths and high plastic properties. The well–known properties of materials under dynamic load are of help in the overall estimation of the behaviour of a particular steel. This article presents soyle experimental data concerning the behaviour of low alloy 10G2SAF steel at a load rate K = 2.5 × l05 MPa m1/2 s−1. Temperature relationships of impact toughness, dynamic yield stress and fracture toughness are considered and the critical temperatures are determined in accordance with some technological requirements.