欧美午夜精品一区二区三区电影-中日韩高清无专码区2021-人人爽人人爽人人片av亚洲-亚洲欧洲国产成人综合在线-久久久久久亚洲精品a片成人

A2 OR A4 STAINLESS STEEL?

Time:2021-04-30
Q: Should I choose A2 or A4 stainless steel balls

Q: Should I choose A2 or A4 stainless steel balls

A: A) Prioritize choosing the standard-compliant A2 (commonly known as 304) stainless steel. Generally speaking, it can meet the requirements of most usage environments.

B) In environments with higher corrosion requirements, such as petrochemical, chemical, nuclear power, and coastal areas, consider selecting A4 (commonly known as 316) stainless steel balls.

Next: End