QUESTION 7An S-590 iron component (Figure provided) must have a creep rupture lifetime of at least 20 days at 650°C (923 K). Compute the maximumallowable stress level.T(20 + log t,)(°R-h)3540x103 ×103 x103 ×10³ ×103 x10325304550100,00010010,000101,0001216202428x103x103x103x103X103T(20 + log t,)(K-h)Attach FileBrowse My ComputerBrowse Content CollectionStress (MPa)Stress (psi)

Given: The Creep rupture lifetime of iron S-590 is 20 days. The Rupture of iron is observed at 653°c (923k). The Maximum allowable stress level is identified below. The Lasson miller parameter generally describes the life time of the material versus time and temperature. The general form of the Lasson miller parameter is given as below, L=T(20+logt1000 Where, L= The Lasson miller parameter. T=The Temperature (in 0°c) t =The time (in hrs).On computing the value of Lasson miller parameter as follows, T(20+logtr) =923 20+log[ (20) (24 hday) =20.9×103 From the curve it is provided that the identified Lasson miller parameter value coincide to a stress level of 280 MPa (40,000 Psi). Therefore, the Maximum stress level permitted is identified as 280 MPa (40,000 Psi)

Answered: An S-590 iron component (Figure…

An S-590 iron component (Figure provided) mus allowable stress level. T(20 + log t,)(°R-h) 25 30 35 40 45 50 x103 x103 ×10³ ×10³ x10³ x10³