1.3343 1.forged or hot rolled 2.SEP1921 D/d 3. 30-60 days 4. black,milled,turned ContentCategory SteelClass Tool steelType Molybdenum high speed steelDesignations France: AFNOR 06-05-04-02 Germany: DIN 1.3343 Italy: UNI KU Japan: JIS SKH9 Sweden: SS 2722 United Kingdom: B.S. BM 2 United States: ASTM A600 , FED QQ-T-590 , SAE J437 , SAE J438 , UNS T11302 Composition ElementWeight %C 0.78-1.05 Mn 0 ...