Бычара » Пт сен 27, 2019 21:50
Замечательный конь-текст.
Это ссылка на EN 13445-3:2002
For ferritic steels, the safety factor of 2,4 put on the ultimate strength at 20° C impedes efficient use of the new
modern high yield strength steels (Thermo-Mechanically rolled and Quenched and Tempered steels). Therefore
Annex B of EN 13445-3, DBA Direct Route, allows the use of a reduced safety equal to 1,875, but still giving a
margin of safety of 2 towards burst for vessels with moderate notch effect (e.g. weld details of testing group 1 in
accordance with Annex A of EN 13445-3).
For austenitic steels with a rupture elongation greater or equal than 35 %, the nominal design stress based on the
ultimate strength at calculation temperature T is safe, but may induce large strains. Therefore the nominal design
stress cannot exceed the value:
И смайлики, конечно же, - три, как и положено по нормативам )))