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If you want to find a steel

If you want to seek a steel with high wear resistance (7-9), high temperature hardness (7-9), medium machining (4-7) as well as air hardening characteristics, the list would help appropriate choice. However, the fact the application of such a table is impossible to compare the children of one hundred kinds of tool steel in a steel, while trying to choose the right tool steel groups, often in resolving the steel selection first do. For the more important groups and grades of tool steel. Have selected the correct group and level, then they would have minor differences in important performance package live at this level, different steel careful study.

The cross bar to give a specific figure in the case of one or both of a specific steel, with Benxi Iron and Steel Department of adjacent steel or other steel is essentially the difference in performance. This table is mainly to provide relatively 14 Department of tool steel. It is based on the primary and secondary selection factors.

Apart from carbon tool steel and high-speed steel, the other of each steel is also divided into several groups. In low-alloy steel, the difference between 211, 232 and 220 steel, the former carbon content greater than 0.65%, while the latter carbon content less than 0.65%. The 300 special purpose tool steel in the two kinds of impact-resistant steel with high toughness, and some other minor performance difference. 400 cold work die steel oil hardened type, air hardening type high-carbon high-chromium, and particularly high vanadium wear four different in nature from the Department of steel. Group of 500 steel, platinum plus 5% chromium steel, tungsten 5% chromium steel and tungsten, three hot work tool steel selection performance to be selected, the last also includes 600 high-speed steel.

Such a tool with high toughness (7-9), by reference to Table 6 & 7, is 100 lines (carbon tool steel), 220 lines (low-alloy tool steel), 310 or 320 series (impact resistant tool steel ) or 520 line (containing chromium hot work die steel). Offers a wide selection of steel, from so many ~ 64. Access to common tasks hardness in this column, we exclude all outside of the 100 Department of steel, unless they are carburizing. Another option might be to hope that the steel is deep hardenability, which called for air hardening. So that only 520 of the Department, but this case is not up to HRC64.

Further may also be outside the high toughness requirements of the best machinability (9), the range of options will be narrowed to 100 Department of steel.

Now assume that the first option is to require the best wear resistance (7-9), which means we will select the 430 steel (high carbon and high chromium tool steel), 440 Department of steel (especially wear-resistant tool steel) or 600 steel (HSS). If the requirements in the most wear-resistant, while both air hardening, quenching temperature as low as possible choice is narrowed down to 430 or 440 of the Department of steel. Other hand, if you want to pick a best toughness of steel in this high-wear type, we see the first choice for all types of steel toughness level is generally lower (l ~~) 600 group of steel in the deep hardening steel is the best performance. If a tool you want to select only high toughness both high wear resistance steel (two opposing performance) in Table 6, 7, fourth and fifth column, you can choose one kind of marking the various average value (6) of the material. This will be between 420 (an air quenched steel) steel and 530 or 540 steel (tungsten or chromium, tungsten hot work die steel). These types of steel have been selected according to the above requirements, but also secondary factors such as hardening method, deformation characteristics, or cutting to choose. Table 6 a 8, both on the selection factors of this method provides a more detailed overview of manufacturing factors.

This is the recommended choice. Readers should learn a tool steel application of analytical methods based on the metallurgical properties, and select the most to meet the performance requirements tool steel or steel group. For many purposes, in accordance with the main choice factors (wear resistance, toughness, high temperature hardness) and the mutual relations of the secondary selection factors, need to consider two or more steel, Department, should also consider the influence of manufacturing factors and the cost of it.

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