YXR Series

YXR Series

Matrix Type High-Speed Steel

Hitachi Metals has developed a new matrix type high speed steel with high toughness and strength. The YXR Series consists of three different grades:

  • YXR3: Tool forging with superior toughness
  • YXR33: Tool forging with greatest toughness
  • YXR7: Tool forging with both superior strength and toughness

Chemical Composition

C Cr W Mo V Co
YXR3 0.6 4.3 2.9 1.8
YXR33 0.5 4.2 1.6 2.0 1.2 1.0 or less
YXR7 0.8 4.7 1.3 5.5 1.3

Further Literature:

YSS High Speed Tool Steel


SLD-Magic: Superior Cold Work Tool Steel

An ideal metal for dies due to its easy machinability, reduced dimensional change from heat treatment,  and impressive durability and hardness characteristics, Hitachi’s exclusive SLD-Magic cold work tool steel is an exceptional choice for an array of die applications, including:

  • Bending and blanking dies for automotive parts
  • Blanking dies for electrical appliances
  • Hydroforming dies
  • Cold press dies

Product Features

  • Wear Resistance – SLD-Magic improves wear resistance by 35% compared to 8%Cr steel due to improved carbide morphology; this leads to improved workable mold life.
  • Surface Treatment – Adherence of surface treatments to SLD-Magic is improved by 30% over 8%Cr steel.
  • Heat Treatment – Deformation from heat treatment is reduced by 40% when compared to 8%Cr steel.
  • Machinability – Machinability is increased by 35% over 8%Cr steel.



Additional Information




Premium H-13

Our hot work die steel, DAC-P is most widely used as die insert material for aluminum and zinc die casting molds. With the introduction of isotropic technology, DAC-P material has become tougher with improved stability for prolonged die life. Although DAC-P material was modified from H13 grade steel, DAC-P has improved the balance of strength, toughness and heat resistance.


DAC-P meets the material specification of NADCA #207.  In addition, DAC-P was recently listed as provisional insert material on GM DC-9999-1 and Ford AMTD-DC2010 standards documents.


  • Good balance of both strength at elevated temperature and toughness
  • Good machinability with less deformation after heat treatment


  • General die for aluminum die casting
  • Die for zinc die casting




Advanced Cold Work Tool Steel

Another exclusive Hitachi metal, SLD-i is an advanced cold work tool steel improving upon AISI D2 steel. Through extensive research and development, Hitachi’s expert metallurgist team brings a superior product to the tool steel array.

Product Summary

SLD-i’s unique composition features small, dense, homogenous carbide distribution, which provide it with the following unique features:

  • Small and isotropic heat treatment deformation
  • Good galling and wear resistance characteristics
  • Higher hardness ratings than that of D2/1.2379

In addition, SLD-i offers minimal dimensional change under heat, as well as shorter lead times and improved production times over standard D2 steel. When the project calls for only the best in cold work tool steel, look no further than SLD-i.




Advanced Die Casting

This die steel is used in manufacturing highly precise castings in large volumes quickly.
It combines the ability to withstand high temperatures during heating and quenching in the heat treatment cycle with toughness, and minimal cracking in cooling channels contributes to improvements that mean longer-lasting dies.


  • High strength at elevated temperature and excellent heat crack resistance
  • High toughness prevents gross crack of die
  • Improved stress corrosion cracking resistance reduces crack problem from cooling channel
  • Better machinability than conventional SKD61 improved steel (high toughness type) possible to reduce manufacturing time and total cost

Heat Crack Resistance

Compared with conventional steels, DAC-MAGIC contributes to longer die life due to better heat crack resistance.