What material is bolt A2-70 made of?
Thread Content
What is the material and chemical composition of bolt A2-70?
This post was last edited by never53 on 2010-11-6 at 15:12. Reply to 1# liyujie0042: This should be the mark on the nut! A2-70 is essentially equivalent to nuts made of 304 material; A denotes austenitic structure, 2 indicates the range of composition (A2 is a category), and 70 means that the minimum guaranteed stress is 700 N/mm^2
70 is one-tenth of the tensile strength; the specific mechanical properties and chemical composition can be found in the mechanical design manual