W. NR. 1.1730


Carbon tool steel characterized by adequate hardness of hardening layer, high toughness and very significant insensitivity to hardening cracks. Further the steel is characterized by good ductility at the heat and good workability in the annealed state.


For locksmith and assembly tools, tools for woodworking, hardened components of molds, e.g. base plates, cases, columns, stops, suspension components and products etc. Further the steel is appropriate for agricultural, blacksmith and bricklayer tools.

Chemical composition of steel W.Nr. 1.1730

Steel gradeChemical composition in %Hardness in the state
CMnSiCrWMoVNi maxCoP max.S max.HB max.HRC min.
DIN C45W0,40-0,500,60-0,800,15-0,40      0,0350,03519057
ČSN 19 0830,40-0,500,60-0,800,15-0,40      0,0350,03519056

Heat treatment of steel W.Nr. 1.1730

WayTemperature [°C]Procedure
Forging1050-800Cool slowly in calm air or better e.g. in dry ash or other thermally-insulated material
Normalization840-860Cool in air
Soft annealing680-710Warm 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
Hardeningin water790-820Big and simple objects
in oil800-830Thin cross-sections of thickness up to 5 mm
Tempering180-300Cool in air or water, the degree of tempering is set by hardness and toughness of instrument according to the tempering chartPoznámka


  • Cross-sections thicker than 5 mm have a hardening irregular layer and are softer on the surface at hardening into oil.
  • After hardening into oil the hardness of about 50 HRC is reached.Tabulka popouštěcích hodnot v závislosti na tvrdosti

Chart of tempering values depending on the hardness



Product range

Round bars: D20 - D615
Metal sheets: s.10 - s.200
Blocks: 510x1600
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