W. NR. 1.2365


Tool steel for hardening in air or in oil with very good hardenability, with high resistance to the tempering, very good firmness during the heat and very good toughness and also resistance to tearing in consequence of thermal fatigue. The steel has a low sensitivity to quick changes of temperatures and is mainly suitable for tools cooled by water. It is well-workable during the heat and well-workable in the soft-annealed state.


For tools for mechanical working during the heat such as dies, die inserts, matrixes, jaws, punches, thorns, for tools cooled by water, automatic machines, for production of dies, screws, rivets, bearing rings etc., tools for extrusion of copper and its alloys, aluminum and its alloys in a large-lot production. Further the steel is appropriate for tools for hot cutting, for cutting thorns and trimming dies. The steel is also used for molds and their parts such as highly stressed firm and movable parts of molds, cores, sliders, distributors for pressure casting of products from copper and copper alloys or for a large-lot production of castings of a difficult shape from the aluminum and its alloys.

Chemical composition of steel W.Nr. 1.2365

Steel gradeChemical composition in %Hardness in the state
CMnSiCrWMoVNi maxCoP max.S max.HB max.HRC min.
DIN X32CrMoV330,28-0,350,15-0,450,10-0,402,70-3,20 2,60-3,000,40-0,70  0,0300,03023052
ČSN 19 5410,27-0,370,20-0,500,30-0,702,80-3,40 2,70-3,500,50-0,80  0,0300,03023548

Heat treatment of stee W.Nr. 1.2365

WayTemperature [°C]Procedure
Forging850-1100Cool slowly in air or in dry ash or in other thermally-insulated material
Soft annealing750-800Warm few hours (according to the size of object), mostly four hours are enough and cool slowly in the furnace
Annealing to lower tension600-650Warm 1 to 2 hours and cool slowly in the furnace
Hardening1020-1050Cool in oil or bath at the temperature of 500 – 550 °C
Tempering560-670Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart


  • To lower deformations, especially at rugged tools, it is more appropriate to cool in hot bath or small tools in air. 
  • It is necessary to temper at least twice after hardening in hot bath or in air.

Chart of tempering values depending on the hardness:



Product range

Round bars: D21 - D303
We will deliver any semi-finished products from the above mentioned dimensions. Other dimensions, except for given stock supplies, have to be consulted with us.

Tool steel meets the requirements of various kinds of tools, e.g. for machining, hot- and cold-working, measuring instruments and die-casting moulds. We also offer high-speed steel.

Tool steel meets the requirements of various kinds of tools, e.g. for machining, hot- and cold-working, measuring instruments and die-casting moulds. These tool materials conform to great quality demands of steel, like temper, strength, toughness, resistance to tempering, hardening capacity, dimensional stability, etc. The range of tool steel in our store includes products from renowned manufacturers. We also supply high - speed steel.

Special tool steel is suitable for the manufacture of moulds, dies and pressing tools. This steel have better end-use properties than common classic steel, therefore it can help saving considerable amounts of money in manufacture.

This patented Swedish steel is distinguished by its high range of use. It is suitable for the manufacture of tools and moulds as well as machinery parts. This material can replace many kinds of classic tool and structural steel.

We supply these grades of steel: St52.3, C45, 16MnCr5, 42CrMo4