4140 Chrome Moly Steel Barrel

Suitable barrel alloys include types having varying amounts of chromium molybdenum vanadium nickel and manganese as alloying metals.

4140 chrome moly steel barrel.

Multiple steel types are used in the manufacture of the nbsp ar 15 barrel. This is an alloy selected to produce hammer forged barrels. Aisi 4140 is a chromium molybdenum alloy steel. First let s have a discussion about the chemical elements of each material and how their properties effect barrel life accuracy and cost.

Chrome moly this name is used to describe a broad family of steels the most common in use for the ar are 4140 and 4150. About 99 of barrels are made up of one a few different types of steel alloy of these the choice is pretty much between chrome moly steel and stainless steel. The highest grade of each series of steels carbon and stainless respectively. 41v45 a chrome moly variant it has a dash of vanadium in it.

4150 the same as ordnance steel but with the carbon content upped to 0 5 percent. Some manufacturers prefer to use 4140 or 4150 steel while others prefer to use 416 ss or 416r steel for its properties. In europe vanadium and nickel steel alloys are preferred. Is called sae 4140 chrome molybdenum or chrome moly steel.

Steel is alloyed with other metals like nickel and chrome as well as other non metals such as carbon sulfur and silicon. Typically the answer to the question all depends on what you as the shooter are going for in your intended build and its application faxon only uses 4150 or 416 r steels in its barrels. The 41xx indicates the aisi sae numbering for chromium. Faxon is often asked which barrel material we d recommend for a given application.

So which steel is the best ar 15 barrel material then. Some other manufacturers prefer to chrome line the inside of their ar barrels and some do not. A popular example and perennial favorite in the u s. 4150 holds up better to serious abuse and it s found primarily in mil spec ar 15 barrels.