The 718HH ASSAB UHB IMOAX SUPREME Sweden "Assab" pre-hardened plastic mold steel 
 718HH 718HH within the ASSAB the UHB IMOAX SUPREME Sweden "Assab" pre-hardened plastic mold steel 
 The main ingredients (%) C carbon-Si silicon Mn Cr NO Mo-Ni S sulfur 
 0.37 0.3 1.4 2.0 1.0 0.20 <0.01 

 Factory state by hardening and tempering to DELIVERED CONDITION 330-370 HB hardness 
 Steel the characteristics of this steel has been heat treated, uniform hardness through stabilization (HB330-370) made from mold never be deformed. In addition to the smaller fancy, more than has been excluded surface oxide black, it is high utilization of materials, and can reduce processing costs by ultrasound examinations, uniform hardness and metallurgical structure, and easy to reach the mirror polished. Available method of flame hardening in the air, so that part of the vulnerability of local and hard-to 50-55HRC, about 5mm depth. 5 due to the sulfur bottom, seal EDM is more suitable.