A BOP is a high pressure safety valve at the top of an oil well that stops uncontrolled fluid/gas flow. There are two main types of BOP valves: annular and ram. Annular BOPs can seal around different pipe sizes. Steel insert plates reinforce elastomeric sealing rings in annular BOPs, transferring force to create an effective seal. Nickel-chrome-moly steel alloy 8627 was chosen for the insert plates due to its strength and hardness properties being well-suited for the requirements.