ASTM A519 AISI 4140 SCM440 alloy steel seamless chrome pipe tube Chromoly is specified by the SAE Society of Automotive Engineers. the Alloy elements of 4140 are chromium and molybdenum, this is why its often called chromoly or cromo.
Datasheet for Steel Grades Carbon Steel ASTM 4140This page is mainly introduced the ASTM 4140 Datasheet, including chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of ASTM 4140,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
AISI 4140 Seamless Pipe is tubing made to the pipe schedule. Alloy pipe in the power industry generally refers to A335 material, but in the oil and gas market, 4140 Pipe is used. This product is made to the pipe schedule but uses A519-4140 as the controlling Seamless specification.