hot die steel H12

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tool steel, hot die steel hot work steel H*2 mould steel, alloy steel, die steel, tool steel, hot die steel, steel plate, steel bar, die block Grade:aisi H*1, DIA 1.***3, GB/T 4Cr5MoSiv 1. Quality IMS: aisi H*2 2. Quality and standards: aisi 3. Manufacturing process: EFS DV forging annealing UT Surface treatment ESR is available. The manufacturing process to provide that the material supplied according to these specifications has a high grade of structural homogeneity and thin grain size. 4. Chemical analysis According to DIN ****0 with the following limits on S and P: C 0.*0~0.4 Mn 0.*0~0.*0 Si 0.*0~1.*0 P<0.**0 S<0.**0 Cr4.*5~5.*0 Mo 1.*5~1.*5 V 0.*0~0.*0 W 1.0~1.*0 ESR: P�0.**0, S�0.**8 5. Microstructure The structure in annealed condition must be thin and uniform. Structures like or better than the given model pictures are allowed: - As �Rating chart for the evaluation of microstructure of annealed hot work tool steels� (SEP ***4) GA5 � GB4 � GC2 � GD1 � GE1 Structure may be allowed even if out of limitation if it satisfies the impact strength values shown in point *1. 6. Microhomogeneity Microhomogeneity is evaluated by comparison to the standard pictures represented in �Rating chart for the evaluation of microstructure of the alloy�s microhomogeneity of hot work tool steels� (SEP***4). An observed structure like SC4 � SC3 � SC2 and SD4 � SD3 � SD2 are accepted; SC1 and SD1 are tolerated for diameter �>**0mm. 7. Hardness Annealed HB **0 max 8. Macrostructure The macrographic etching on the transverse section of the product (see ASTM A **4) must show a macrostructure without appreciable defects. 9. Ultrasonic testing (as SEP***1/*4) are not allowed if in class upper than: Cc dia