Alloy Steel Forged Parts

Alloy steel is widely used in open die forging and seamless rolled ring manufacturing.  The chemical elements added to the steel, such as chromium, nickel, manganese or molybdenum, increase its strength, hardness, and hardenability, toughness, wear resistance, corrosion resistance, creep resistance, or use at elevated temperatures, pressures, mechanical stresses, wear, corrosive, abrasive, impact, or high friction environments.

The alloying elements of the steel define its performance in its end use.  Alloy Steel 4140 is the most commonly used material for open die forging or the manufacture of seamless rolled rings.

All Metals & Forge Group can produce billets of specialty alloy steel chemistries, often referred to as 41XX.  AMFG also forges alloy steel made by ESR, or VAR. 

The chemical and mechanical properties of alloy steel make it an excellent choice for component parts finish machined from round, flat, square and hex bars, blocks and rectangles, discs and rings, cylinders, or shapes with steps, flanges, or complex finish machining requirements.  It is also widely used to manufacturer seamless rolled rings, a process to improve the mechanical properties and grain flow of rings for specific applications where increased tensile or yield strength are required for the end use.  Carbon and alloy steels are excellent for uses requiring a prolonged service life (10 to 20 years).

Common specifications for alloy steels include ASTM A668 Classes G-N, and ASTM A182.  Depending upon the Class, the alloy steel can be annealed, normalized, normalized and tempered, or normalized, quenched and tempered.  Hardness can range from 163 BHN to as high as 402 BHN depending upon the Class, heat treatment, and part size. Other industry standard specifications include AISI, AMS, API, UNS and international standards depending upon the shape of the alloy steel for its end use.