(a) Stainless steel type 304 (18-8) is an austenitic stainless steel possessing a minimum of 18 % chromium and 8 % nicke

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A Stainless Steel Type 304 18 8 Is An Austenitic Stainless Steel Possessing A Minimum Of 18 Chromium And 8 Nicke 1 (197.83 KiB) Viewed 42 times

(a) Stainless steel type 304 (18-8) is an austenitic stainless steel possessing a minimum of 18 % chromium and 8 % nickel and a maximum of 0.08 % carbon. (i) Fig. B2 is a ternary phase diagram of stainless steels. Sketch a simple diagram onto the answer sheet and illustrate how the point of the 18-8 stainless steel on the diagram is determined. [5 Marks] (ii) Discuss the main advantages of austenite stainless steels and typical applications (at least TWO) [5 Marks] Stainless Steel 10 90 Ternary Phase Crk Diagram 80 20 30 70 40 60 Weight Percent Iron Cr 50 Cr+ YFeNi 50 Weight Percent Chromium 60 30 40 70 10+ Y FeNi 80 18-8 Stainless steel 90 yFeNi Fe Weight Percent Nickel NI 10 20 30 40 50 30 40 50 60 70 80 90 Cr+yFeNi 20 10 1