Sensing quenching steel generally has the following requirements:

1. The carbon containing amount of steel is determined by the working conditions of the parts, which can be 0.15% to 1.2% from W (c), which is the most basic requirement.

2. Steel should have austenitic crystal grains that are not easy to grow up, and the essential fine grain steel is selected.

3. Steel should be as fine, dispersed original tissue as much as possible. This is especially important in induction heating because the heating temperature inductively heating is high, which is more difficult to accurately control the temperature specification.

4. The selection of suits, for some important parts such as crankshaft, camshaft, etc., when choosing a steel number, often propose additional requirements for the selected carbon content, and select carbon content on the content of high quality carbon steel. 0.08% (e.g., 0.42% to 0.50%) reduced by 0.05% (e.g., 0.42% to 0.47%), which reduces the effects of carbon content fluctuations to generate cracks or layers.

5. Decarbonite depth requirements of cold drawn steel. The quenched hardness must be tested after the lean carbon layer must be ground.