What are ASTM Grades?

- Aug 30, 2017-

What are ASTM Grades?


ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition of pipes, fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by "Grade".


For example, a carbon steel pipe can be identified with Grade A or B, a stainless-steel pipe with Grade TP304 or Grade TP321, a carbon steel fitting with Grade WPB etc..


Below you will find as an example 3 tables with chemical requirements for:


  1. Flanges according to ASTM A182 Grade F304, F304L F316L

  2. Pipes according to ASTM A312 Grade TP304, TP304L, TP3016L

  3. Fittings according to ASTM A403 Grade WP304, WP304L, WP316L


Furthermore, a table with frequently used ASTM Grades, arranged on Pipes, Fittings, Flanges, Valves, Bolts & Nuts, which belong together as a group.


ASTM Grades.jpg

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