On the way to 4130 with Osborn Metals

4130 is by far the most widely grade in the USA for the production of alloy steel tubes for the aerospace and motorsport sectors, particularly for chassis and roll cages.
It is a Chrome Molybdenum 30CrMo4 steel, close to the 25CrMo4 commonly used in Europe.
Osborn Metals manufactures on request 4130 tubes in the different physical conditions stated in the AMS T 6736 standard :
A (annealed), N (stress relieved), HT (Heat Treated in the three possible levels : HT-125, HT-150, HT-180).