Chemical composition: 
 C Cr Mn Mn V V W W 
 0.95 0.6 1.1 0.1 0.6 

 Factory Hardness: HB190 
 Characteristics: processing, good heat dimensional stability 
 Excellent mechanical processing 
 Insult the hard time, excellent dimensional stability 
 Insult hard and tempered by the high surface hardness and toughness of any good body 
 The performance of these integrated manufacture of the DF-2 tool or die life and the economic benefits of good 
 Uses: Small pressure gauge die, lathe measuring guide thimble sets, mandril, small / medium drill bit and tap the small gears, pistons, nozzles, cam.