JIS-G4404-Alloy-Tool-Steel

G)JΠSG4404:2000Alloy tool steelsIntroduction This Japanese Industrial Standard has been prepared based on thecorresponding International Standard,ISO/FDIS 4957:1998 Tool steels at the"Modified"level of ISO/IEC Guide 21:1999 on the occasion of reviewing JIS G 4404:1983 in accordance with JIS Z 8301 Rules for the drafting and presentation of JapaneseIndustrial Standards.1 Scope This Standard specifies the alloy tool steels (hereafter referred to as "steels")manufactured by hot-rolling or forging.Remarks:The International Standard corresponding to this Standard is as fol-lows.In addition,designation indicating the degree of correspondence isIDT (identical),MOD (modified),and NEQ(not equivalent)in accor-dance with ISO/IEC Guide 21.ISO/FDIS 4957 Tool steels (MOD)2 Normative references The standards given in Attached Table 1 contain pro-visions which,through reference in this Standard,constitute provisions of this Standard.The most recent editions of the standards(including amendments)shall apply.3 Grade and designation The steels shall be classified into 32 grades and thedesignation shall be as given in Table 1.来源：河北美德钢管制造有限公司http:IIww.mei degg..com-1761-