Material Group - Tool Alloy Steel
Alloy steel contains mostly Iron but also have a variety of elements, other than carbon. These elements are deliberately added, in total amounts between 1.0% and 50% by weight to improve its mechanical properties.
Common alloyants include manganese (the most common one), nickel, chromium, molybdenum, vanadium, silicon, and boron
The common Improved properties in alloy steels:
strength, hardness, toughness, wear resistance, corrosion resistance hardenability, and hot hardness.
To achieve some of these improved properties the metal may require heat treating.
Material Group - Stainless steel – Ferritic and Martensitic
Stainless Steel is a steel alloy with a minimum of 10.5% chromium content by mass.
Stainless steel is used where both the properties of steel and corrosion resistance are required and it differs from carbon steel by the amount of chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture.
There are different types of ISO P stainless steels:
Significant quantities of manganese have been used in many stainless steel compositions. Manganese preserves an austenitic structure in the steel, similar to nickel, but at a lower cost.
Stainless steels ISO P materials are also classified by their crystalline structure:
• Ferritic stainless steels generally have better engineering properties than austenitic grades, but have reduced corrosion resistance,
because of the lower chromium and nickel content. They are also usually less expensive.
• Martensitic stainless steels are not as corrosion-resistant as the other two classes but are extremely strong and tough,
as well as highly machinable, and can be hardened by heat treatment. It is quenched and magnetic.