PE Metallurgical case studies
PE Metallurgical · Put your knowledge to work in context.
The PE Metallurgical and Materials exam is one of the NCEES Principles and Practice of Engineering (PE) examinations, which test for a minimum level of competency in a particular engineering discipline. It is designed for engineers who have gained a minimum of four years post-college work experience in their chosen engineering discipline, and it is generally the final technical step candidates take on the path to licensure as a professional engineer through their state or provincial board. The PE Metallurgical case studies are 5 cases and about 3,208 words.
1Pump Shaft Fatigue at a Shoulder Fillet
A 45 kW centrifugal pump is driven through a 50 mm diameter 4140 shaft, quenched and tempered to 285 HB (Sut about 1000 MPa, Sy about 850 MPa). At the bearing shoulder the diameter steps to 60 mm with a 1.5 mm fillet; the shaft turns at 1800 rpm.
785 words, about 4 min2Chloride Cracking in a 304L Heat Exchanger
A 304L stainless steel heat-exchanger shell operates at 60°C with cooling water containing 150 ppm chloride. The outside is insulated and occasionally wetted by washdown.
681 words, about 3 min3GFRP Hypochlorite Line: Hoop Stress vs. Environmental Derating
A DN200 filament-wound epoxy FRP pipe carries 12% sodium hypochlorite at 65°C and 8 bar. The inside diameter is 200 mm and the specified wall is 4.5 mm.
585 words, about 3 min4Cold Cracking in a Thick-Section Pressure-Vessel Weld
A 25 mm thick SA-516 Gr 70 pressure-vessel shell is welded with a cellulosic electrode using 180 A, 22 V, and 3 mm/s travel speed. The plate composition is 0.18% C, 1.25% Mn, 0.35% Si, 0.20% Cr, 0.10% Mo, 0.02% V, 0.10% Ni, and 0.10% Cu.
561 words, about 3 min5Superheater Tube Bulge After 90,000 Hours
A SA-213 T22 superheater tube has a 51 mm outside diameter and a 6 mm wall. It operates at 100 bar steam pressure and a calculated mean metal temperature of 540°C.
596 words, about 3 min