Class 4 (4th Engineer) MEKG 📅 Sep 2022

Exam Question

(a) Outline the manufacturing process for the production of steel suitable for ships' shell (8)

(b) (i) Sketch a simple iron-carbon, equilibrium diagram and indicate a typical composition plating of ships' steel. (4)

(ii) Sketch the microstructure of this steel. (4)

Reference Answer

### (a) Manufacturing Process for Ship's Shell Steel (Surveyor-Grade Explanation)
The production of steel suitable for a ship's shell plating is a multi-stage process designed to create a material with specific properties of strength, toughness, and weldability. The process, from raw materials to the finished plate, is as follows:
1. **Iron Making (Blast Furnace)**
* **Objective**: To reduce iron ore into molten iron (pig iron).

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