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MEO Class II – EK-General : 2011/MAR/08 – 2013/JAN/07 – 2016/FEB/08 – 2016/APR/08 – 2016/OCT/08 – 2017/OCT/08 – 2021/MAR/04 – 2023/JUL/06
Question
Q4. A. State the laboratory tests that may be carried out on specimens of steel for ships’ plate giving reasons for the tests.
B. The basic compositions of two ships’ plates are given in Table below one is an example of modem practice whilst the other is a specification of a 1940’s tanker that split in two due to brittle fracture. Compare these two specifications critically and explain which of these two steels would be most resistant to brittle fracture
. | C | M | SI | S | P | AI | N |
Steel ’A’ | 0.18% | 0.70% | 0.30% | 0.04% | 0.04% | 0,015% | 0,005% |
Steel ‘B’ | 0. 19% | 0.57% | 0.03% | 0.029% | 0.042% | 0.005% | 0.008% |
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