Astm A370.pdf -

But what actually lives inside that file? Is it just a list of strength requirements, or is it something more?

In short, It doesn’t tell you what strength your steel should have (that’s in product specs like A36 or A500). Instead, it tells you exactly how to pull, bend, or break a sample to prove its strength.

Let’s open the PDF and decode what matters most. Full Title: Standard Test Methods and Definitions for Mechanical Testing of Steel Products