Fig. 12 Chloride stress-corrosion cracking in a type 304 (Unified Numbering System, or UNS, S30400) stainless steel vessel after a new flange connection was welded into place More

Fig. 26 Chloride stress-corrosion cracking of type 304 (S30400) stainless steel tube by chloride-containing sour water. 70× More

Fig. 29 Polythionic acid stress-corrosion cracking of roll-bonded type 304 (S30400) stainless steel cladding. Note that cracking stops at the type 304 (S30400) weld overlay around the nozzle opening. More

Fig. 30 Polythionic acid stress-corrosion cracking of type 304 (S30400) furnace tube near weld to carbon steel tube. Cracking is both parallel and perpendicular to weld but not in the weld. More

Fig. 3 Crevice corrosion of type 304 stainless steel after polarization at +0.05 V(SCE) in 0.017 M NaCl. Mouth of crevice is at the bottom edge of the micrograph. The material boundary is the broken white line. Area of attack is light region above broken line. Source: Ref 5 More

Fig. 4 Example of the results of crevice corrosion. Type 304 stainless steel exposed to 6 wt% ferric chloride for 48 h at room temperature with castellated crevice washer applied around center hole. Pitting also occurred at several sites outside the crevice. The draining of the occluded More

Fig. 18 Cracks emanating from pits in a type 304 stainless steel tank that was placed in hot demineralized water service with an operating temperature that fluctuated from 75 to 90 °C (165 to 195 °F). (a) Micrograph of a section through a typical biological deposit and pit in the wall More

Fig. 19 Localized corrosion of asbestos-gasketed flanged joints in a type 304 stainless steel piping system. (a) Single remaining biodeposit adjacent to resulting corrosion on the flange. Numerous other similar deposits were dislodged in opening the joint. (b) Closeup of gouging-type corrosion More

Fig. 14 Unetched (a) and etched (b) cross sections of a type 304 stainless steel weldment showing chloride pitting attack along a crevice by a lack-of-fusion defect. Service environment: hot tap water More

Fig. 17 Thiosulfate pitting in the HAZ of a type 304 stainless steel welded pipe after paper machine white-water service. Source: Ref 5 More

Fig. 24 Chloride stress-corrosion cracking of type 304 stainless steel base metal and type 308 weld metal in an aqueous chloride environment at 95 °C (200 °F). Cracks are branching and intergranular. More

Fig. 5 Optical micrographs showing defects on the inner surface of type 304 stainless steel pipe near weld root (a) and near through crack (b). Both 670× More

Fig. 16 Effect of potential on the maximum crack growth rate in sensitized type 304 stainless steel in 0.01 m Na 2 SO 4 at 250 °C (480 °F). Numbers denote K I values. More

Fig. 17 Variation in the average crack propagation rate in sensitized type 304 stainless steel in water at 288 °C (550 °F) with oxygen content. Data are from both constant extension rate (CERT) tests, constant load, and field observations on boiling water reactor piping. IGSCC, intergranular More

Fig. 19 Time/temperature/sensitization curves determined by EPR tests on type 304 stainless steel alloys of variable carbon contents More

Fig. 23 Grain-boundary segregation measurements in Alloy 600 and type 304 stainless steel. Shown are auger electron spectroscopy measurements of phosphorus segregation in the two alloys as compared with model prediction for phosphorus segregation in nickel. More

Fig. 20 Corrosion of zinc anodes that were galvanically connected to type 304 stainless steel for four years at six different underground test sites. Courtesy of E. Escalante, National Bureau of Standards More

Fig. 8 Time-temperature-sensitization curves for type 304 stainless steel in a mixture of CuSO 4 and H 2 SO 4 containing free copper. Curves show the times required for carbide precipitation in steels with various carbon contents. Carbides precipitate in the areas to the right of the various More

Fig. 9.9 Flow-stress curve for SS 304, obtained using the hydraulic tube bulge test. Source: Ref 9.5 More

Fig. 12 Intergranular corrosion in type 304 stainless steel. Original magnification: 100×. Source: Ref 3 More