On 20210804, I received an inquiry from a US friend on Google. American friends are looking for 1 inch valve balls. In the exchange, I recommended the valve ball made of satellite 20 to him. The customer purchased 300 satellite 20 1 inch balls.

1. Material of cobalt-based alloy

First, let me introduce you to the cobalt-based alloy. Cobalt-based alloy is a wear-resistant, corrosion-resistant and high-temperature resistant material. Usually, we also call them cobalt chromium tungsten or Stellite. Let me show you the chemical composition and hardness of Stellite 20.

2. Introduce some properties of Stellite (cobalt-based) alloy:

①. It has high strength, good thermal fatigue resistance, thermal corrosion resistance and wear resistance, and has good weldability.

②. The thermal stability of carbide in cobalt-based alloy is good.

③. Cobalt-based alloy has good heat resistance and corrosion resistance.