However the aisi sae tool steel code categorizes tool steels based on basic application and material characteristics.
S7 tool steel hardness before heat treat.
The specific properties of s7 d2 and a2 tool steels which are among the most popular in industrial and manufacturing applications today are discussed in further detail below.
S 7 is typically heat treated and used in the rockwell c hardness range of rc 54 59.
S7 tool steel is produced and supplied to the machinist or tool maker in the annealed or soft condition.
Simply stated the tool is quenched into oil until the section just turns black followed by air cooling.
Air hardening and versatile enough for use in both cold and hot work tooling make s7 suitable for a wide range of applications that require shock resistance size stability and.
S7 an air hardening shock resisting tool steel is a classic example of a steel which will not develop full hardness in larger sections unless it is given an interrupted oil quench.
As a result dozens of tool steel types exist.
S7 shock resisting tool steel is an air or oil hardening tool steel that is characterized by very high impact toughness.
S7 is easy to machine in the annealed condition and can be readily heat treated.
S7 also has medium hot work characteristics making it a versatile tool steel for both cold and warm shock applications as well as plastic molds that require high hardness.
It can be quenched in air exhibiting minimal distortion on hardening.
This process is commonly called interrupted oil quenching.