- The impact energy of standard Mn18Cr2 is 120-150 J/cm²
- The impact energy of Microalloy steel is 80-90 J/cm²
The result show the microalloy steel jaw plates have a lower impact energy.
- The standard Mn18Cr2 tensile strength is around 600-800 MPa; Yield strength is around 520-580 MPa; Elongation and shrinkage is around 22-28%;
- The Microalloy steel tensile strength is around 600-800 MPa; Yield strength is around 520-580 MPa; Elongation and shrinkage is around 10-14%;
The result shows the tensile strength and yield strength are the same, but the elongation and shrinkage had changed a lot. The Microalloy steel jaw plates elongation and shrinkage just half of the standard.
Compare with the standard Mn18Cr2, the Microalloy steel surface hardness is higher which more than HB190; Grain size get Grade 2; More dispersed carbides are formed inside the grains which increase the wear and tear.