ASME STP-NU-020 PDF
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Verification of Allowable Stresses in ASME Section III Subsection NH for Alloy 800H
Description
The assessment of the data needed to extend the ASME Section III coverage of alloy 800H to 900 C (1650 F)
View additional information part i base metal – databases summarizing creep-rupture properties alloy 800h variants reviewed referenced. part, database judged adequate meet needs time-dependent extension asme section iii subsection nh (iii-nh, components elevated temperature service) 900°c (1650°f) 600,000 hours. procedures analyzing creep stress-rupture data iii-nh compared current procedure endorsed ii materials. range 750 1000°c (1382 1832°f) assembled used estimate average minimum strength times hours. weldments tensile deposited weld temperatures 750°c (1382°f) higher reduction factors (srfs) function time (1650°f). inadequate use filler five appendices included 1) listed evaluation srfs, 2) provided values parametric constants models, 3) example calculated srfs 82, 4) recommended supplemental testing expand improve estimation long-time service 5) summary finite element analysis (fea) study cross-weld samples.
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