Due to the balanced combination of a modified chemical composition and an optimised processing route, optimum material properties have been achieved in BÖHLER W403 VMR:
Good macro and microstructure with lowest levels of segregation
Lowest gas contents
Lowest levels of unwanted trace elements
Excellent homogeneity and isotropy
Highest degree of cleanliness
Best polish ability
Best thermal conductivity
Highest dimensional stability during heat treatment
Good mach inability
Higher working hardness for increased service life (less hot wear, higher hot strength)
Heat treatment information
600 to650°C/ Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After thorough heating, hold in neutral atmosphere for 1-2 hours.
1020 to 1030°C
Slow cooling to tempering temperature immediately after hardening/ time in furnace 1 hour for each 20mm of workpiece thickness but at least 2 hours/cooling in air. It is recommended to temper at least twice.