The method of making spring steel for automobile?
Steel plate like spring can not be used as a knife. No material, easy to the teeth. If the shape of the tool is not required, the spring coil of the shock absorber can be used.
The south is the car plate making machetes bow. Hardness enough. It is important to quench the heat. A big jump makes a big mouth. Soft edge. Special blacksmith needs to be quenched
You can't put it in the water before the knife has been molded. Fully built, then heat treatment [put into the water], and then sharpening.
