Monel 400 and Monel 500 (often referred to as K-Monel) are Nickel base alloys used for balls in high corrosion and/or high-temperature applications. Monel balls and K-monel balls are used in non-oxidizing corrosive environments in the chemical pump, precision valves, pharmaceutical, marine, petroleum, textile, laundry, pulp, and paper industries. Monel and K-Monel balls are commonly used with seawater dilute sulfuric acid and monel and k-monel balls are highly resistant to alkaline (caustic) solutions. K-Monel balls are used where additional strength and hardness are required.