JIS G4404, for Alloy Tool Steels Otai Special SteelJIS G4404 standard specifies alloy tool steels manufactured by hot rolled or forging. It’s a Japanese Industrial Standard which is prepared based on ISO 49571999 for tool steels. JIS G4404 also specifies some steel grades used for cutting tools steel, impact resistance tool steels, cold working mold steel and hot forming mold steel.
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