Hi All,

Just curious why the hot allowable (Sh) for 1.4903 material at 550 deg. C at 100,000 hrs = 109282.070 KPa (1.4903S-16-100) while at 200,000 hrs = 122335.234 KPa (1.4903S-16-200).

My thought is that for longer service life the level of stress must be lower.

Please correct my interpretation.

Many Thanks & Warm Regards,

It's old EN 13480-2012 code issue
SRT100/Sfcr=164000/1.5=109333
SRT200/Sfcr=153000/1.25=122400

Thanks for that. So it's the difference in the factor used.

Warm Regards,