... glass processing. Characterics: Excellent homogeneity, high cleanliness, high level of isotrophy, good workability, high impact toughness, good polishability ... Lower cost due to: Higher tool life, lower tool wear, less tool repair, less tool changes and consistent heat treatment results ... or 1 hour for 20-25 mm thickness fo tool.Tempering Temperature (oC) vs. Hardness (HRC) ...