4140 UT testing grade

4140 UT testing grade

How many kind of grade does it have?

4140 UT testing grade

It have 5 grade,A/A,B/b, C/c, D/d,E/e.

Which one is the top grade for 4140 UT testing?
Just to think about the grade of Benz Meicelin,you will know.

Alright,let's check it out our UT testing for Plate today.