... 40 Mn 0.60~0.90 S ≤0.035 P ≤0.035 Cr 0.90~1.20 Ni ≤0. ... ,400,60 - 0,90max. 0,035max. 0,0350,90 - 1,200,15 - 0,30 VWTiCuAlNbBN Forging: Shafts ... tempering/quenching +tempering/any conditions based on the customer's requirement Surface conditions: scaled (hot working finish)/ground ... /rough machining/fine machining/based on the customer's requirementFurnaces for metallurgical processing: electrode arc + LF ...