General Information about 8620 Round Bar and 8620 Steel Bar

8620 round bar is a “triple alloy” steel also referred to as nickel chromium molybdenum steel.  8620 steel bar is largely composed of carbon, and is considered a sturdy alloy. The nickel properties result in toughness and ductility, and the chromium and molybdenum increase hardness penetration and wear.

8620 round bar is also machinable and responds well to polishing.  A typical length for 8620 round bar is 20′, although many mills have the capacity to roll a variety of lengths depending on the end application. 8620 steel bar may also be supplied in a wide range of diameters.

It can be supplied in the hot rolled condition, rough turned or turned and polished depending on the application.


When hardened and formed, 8620 round bar may be used to produce hard wearing machine parts in a wide variety of industries.  With its combination of elements along with the ease with which it may be processed, 8620 steel bar is a good choice for a variety of applications. Carburized 8620 alloy is strong and durable and as a result is preferred in certain manufacturing applications.  It is used to make a wide range of gears, crankshafts, gear rings, pinions, piston pins, cams, gauges, tie bars, collets, bushings and bolting as well as hand tools and a multitude of machinery parts and components.


The chemical composition of 8620 steel bar consists of carbon, .18/.23, manganese, .70/.90, phosphorus, .035 (max.), sulfur, .04 (max.), silicon, .15/.35, nickel, .40/.70, chromium, .40/.60 and molybdenum, .15/.25. These specific elements within these percentages are used to produce 8620 steel bar.