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Question: 8 q9 put the following steels in the order of...

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8% (Q.9) Put the following steels in the order of increasing hardness: (p) 0,5%C+10%Cr steel (water quenched to form 100% martensite and then tempered at 560C for 2 hrs.) (r) 0.5%C +2.0%Cr steel (water quenched to form 100% martensite and then tempered at 500C for 2 hrs. (s) 0.7%C+1,0%Cr steel (water quenched to form 100% martensite and then tempered at 500C for 2 hrs. (t) 0.3%C+1,0%Cr steel (normalized) Your criteria in selection: 8% Q.10.) Tensile testing of several steel alloys are done in the R&D department of an automotive industry. However, the results of the testing was mixed. Can you match the test results given in Table A with the alloys given in Table B? TABLE.A. Test Results Your Selection (No) Test Results UTS (MPa) 1600 1200 600 420 Yield Strength (MPa) 1050 370 300 % Elongation 190 15% 26% 32% TABLE.B. MATERIALS IN STOCK Materials 0.18%C plain carbon steel annealed 0.4%+1r steel (Quenched and then tempered at 520C for 2 hrs) 0.4%C steel cooled in air | 0.40 oct 1%Cr steel (Quenched) A D
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