Finally, it comprises at least one tension member (2nn) to provide a tension load between the mounting plates (16, 21).

The quenching is carried out such that neutral or compression stress is produced in the surface of the roll and that the formation of tensile stress in the surface of the roll is prevented by means of quenching.

Said tensile stress is transmitted to the leads (4), thereby increasing the internal pressure in the leads and thus the internal pressure in the entire acceleration protection suit (1).

The adjustment member is configured to be adjusted to vary a tension force applied to the first tension element.

The mechanical tensioning device further comprises a helical spring (19) which subjects the supporting element (11) to a tension force operating in the circumferential direction around the carrying bolt (17).

The connection mechanism is configured to be adjusted to vary a tension force applied to the flexible transmission.

High tensile steel bar or rod having a yield stress of at least 835 N/mm2 and a UTS of at least 1030 N/mm2 is produced as follows.