Grades of material used for pipes, fittings, flanges acc to various Astm standards

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".

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

– Flanges ASTM A182 Grade F304, F304L F316L – Pipes ASTM A312 Grade TP304, TP304L, TP3016L – Fittings ASTM A403 Grade WP304, WP304L, WP316L

ASTM Materials


1. A106▸ This specification covers carbon steel pipe for high-temperature service. 2. A335▸ This specification covers seamless ferritic alloy-steel pipe for high-temperature service.


1. A234▸ This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction. 2. A420▸ Standard specification for piping fittings of wrought carbon steel and alloy steel for low-temperature service.


 A105▸ This specification covers standards for forged carbon steel piping components, that is, flanges, fittings, valves, and similar parts, for use in pressure systems at ambient and higher-temperature service conditions.


A216▸ This specification covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.

Bolts and Nuts

A193▸ This specification covers alloy and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.