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World Steel Number Translation (High Speed Tool Steel)
The world steel number translation (high speed tool steel) is a handy guide of many steels used in the steel industry. It has its origins in the United States and is frequently used to standardize and identify product. This guide is essential for comparing the properties of different steels.
High speed tool steels are a variety of carbon or alloy steel that are known for their application in the tooling industry. These materials are used in tool bits, dies, drill bits and other materials to cut, form, shape and machine different materials. High speed tool steels are typically used for high speed cutting owing to their greater resistance to wearing, heating and deformation.
Steel numbers are the American Iron & Steel Institute (AISI) numbers that classify steels by their chemical composition. These numbers are sometimes assigned to Chinese or other international steel grades for equivalent steel numbers by referencing various translation tables. It is important to note that designation systems vary including the ASTM system and EN (European) system and other countries may assign separate numbers for steels.
AISI numbering system is suitable for designating a broad range of steel grades. This numbering system emphasizes the composition rather than mechanical properties of the steel. The four number codes classify a steel with a certain average percentage of carbon, other alloying elements, the maximum allowable stresses and minimum impact properties. Some steel grades will have letters after them to indicate specific characteristics or tensile strength or hardness.
The 10xx series of numbers covers carbon steel grades; 11xx series covers alloy steels; and 12xx covers structural steels. The 12xx series can be further broken down into 13xx and 14xx to indicate further levels of alloy.
To determine the steel grade equivalent, reference tables can be used. Tables for high speed tool steel are available for various types of steels and countries of origin such as USA, China and India amongst others. As an example, AISI T1 is equivalent to 1.3343 in the European Standard and W18Cr4V in the Chinese Standard.
It is important to not duplicate steel numbers from different countries of origin as the steel number could be the same but the mechanical properties and composition may not be. When using steel for tooling applications it is vital to check the mechanical properties to ensure that it suits the application intended.
High speed tool steel is used in a range of industries and applications such as medical and aerospace where durable and strong parts are essential. By understanding the world steel numbering systems, the trend of steel use can be seen and the performance of different types of steel compared. This steel guide can come in quite handy when comparing the properties of different steels and to determine the steel grade equivalent.
