Calculate stress intensity factor for hoop stress of 6 inch longitudinal subsurface crack. The pipe is austenitic stainless steel schedule 40 304L. The pressure applied is 1500psi. Internal diameter = 5.05, thickness = 0.26 in., Y = 0.95, and 1psi = 0.00689476 MPa Normal operating temperature is 375F. 2. If fracture toughness of the steel above is determined to be 20, would you expect the crack to be elastic or inelastic, and would the crack be growing.