PLASTIC INJECTION MOLD TOOLING AND A METHOD OF MANUFACTURE THEREOF
FIG1 is a flowchart of a series of steps that may be involved in manufacturing plastic injection mold tooling, in accordance with a method of the present disclosure 
A series of steps that may be involved in manufacturing plastic injection molding tooling having high hardenability in sections of 20 inches and larger is shown in FIG1. At a first block 102, a steel melt may be formed in a heating unit, such as an electric arc furnace. The melt may contain a majority but less than all of the requisite alloys, aluminum for example being deferred until near the end of the process. It will be understood that the heating unit used for forming the steel melt may be other types of heating units apparent to those skill in the art such as, but not limited to, a vacuum induction furnace or a laser melting device. Thus, the steel melt may be formed by various processes such as, but not limited to, electric arc melting, vacuum induction melting, laser melting, and other suitable heating methods apparent to those with ordinary skill in the art. For instance, it some embodiments, the alloy elements may be provided as a powder and melted with a laser to form the steel melt.
flowchart
1
-
116
next block
102
first block
108
block
110
block
114
next block
['7. The method of manufacturing the plastic injection mold and die block tooling of claim 1, further  characterized in that  the molds and die blocks have the following composition by weight percent: C 0.25 - 0.33, Mn 0.80 - 1.10, Si 0.20 - 0.45, Cr 1.20 - 2.00, Ni 0.30 - 0.80, Mo 0.35 - 0.55, V 0.10 - 0.20, Al 0.020 max, P 0.015 max, and S 0.005 max.']