See all Blog Posts Alloy Steel | The Four Types of Steel (Part 2) Category: Steel Posted: March 23, 2015 This article is the second in a four-part series on the different types of steel. Read Part 1. Alloy steels are made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium and aluminum. These metals are added to produce specific properties that are not found in regular carbon steel. The elements are added in varying proportions (or combinations) making the material take on different aspects such as increased hardness, increased corrosion resistance, increased strength, improved formability (ductility); the weldability can also change. The most important and desired changes in alloy steel are: Increased hardenability. Increased corrosion resistance. Retention of hardness and strength. Nearly all alloy steels require heat treatment in order to bring out their best properties. Alloying Elements & Their Effects Chromium – Adds hardness. Increased toughness and wear resistance. Cobalt – Used in making cutting tools; improved Hot Hardness (or Red Hardness). Manganese – Increases surface hardness. Improves resistance to strain, hammering & shocks. Molybdenum – Increases strength. Improves resistance to shock and heat. Nickel – Increases strength & toughness. Improves corrosion resistance. Tungsten – Adds hardness and improves grain structure. Provides improved heat resistance. Vanadium – Increases strength, toughness and shock resistance. Improved corrosion resistance. Chromium-Vanadium – Greatly improved tensile strength. It is hard but easy to bend and cut. The most commonly used grades of Alloy Bar: Grade 4140 – Chromium Molybdenum Steel Grade 4340 – Nickel-Chromium-Molybdenum Steel Grade 6150 – Chromium Vanadium Steel Grade 8620 – HSLA -Nickel-Chromium-Molybdenum Steel Buy Alloy Steel This article is the second in a four-part series on the different types of steel. Read Part 3 to learn more about Stainless Steel grades and its attributes. Metal Supermarkets Metal Supermarkets is the world’s largest small-quantity metal supplier with over 100 brick-and-mortar stores across the US, Canada, and United Kingdom. We are metal experts and have been providing quality customer service and products since 1985. At Metal Supermarkets, we supply a wide range of metals for a variety of applications. Our stock includes: mild steel, stainless steel, aluminum, tool steel, alloy steel, brass, bronze and copper. We stock a wide range of shapes including: bars, tubes, sheets, plates and more. And we can cut metal to your exact specifications. Visit one of our 100+ locations across North America today. Share: Facebook Twitter LinkedIn E-Mail Related blog articles Different Types of Metal Finishing: Processes & Techniques Windsor Welcomes Metal Supermarkets The World’s Largest Supplier of Small Quantity Metals What is the Difference Between 7050 vs 7075 Aluminum?