Based on 440 A グレステン steel including sub-zero treatment (low temperature), in addition to several stages
Performs over a special heat treatment. Corrosion resistance, abrasion resistance, heat and cold resistance, toughness (strength), hardness stability
Pursues the quality, such as the sustainability of cutting （ HRC 58-59 degrees), and the advanced features.
Start Date:21/05/2015 00:00 JST
End Date:31/05/2015 23:59 JST
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