Nickel-chrome–molybdenum-vanadium steel for hardening in the stream of air or in oil with high hardenability. The steel has high hardness after hardening, good resistance to the tempering, good toughness and good firmness during the heat. Is resists quick temperature changes and also thermal fatigue. The steel 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 of all sizes, especially with the firmness over Nmm2 for drop hammers and forging presses, extruders with the firmness over 1600 Nmm2 for extrusion of non-ferrous metals. Further the steel is appropriate for knives during the cold cutting of materials of thick thicknesses, knives for scrap iron. For pressing of plastic substances, big forces and breeze-blocks can be produced from this steel and these can be hardened in air.
|Steel grade||Chemical composition in v %||Hardness in state|
|C||Mn||Si||Cr||W||Mo||V||Ni max||Co||P max.||S max.||HB max.||HRC min.|
|ČSN 19 663||0,50-0,60||0,50-0,90||0,30-0,60||0,90-1,30||0,30-0,50||1,50-1,90||0,030||0,030||255||52|
|Forging||850-1100||Cool slowly in air or in other thermally-insulated material|
|Soft annealing||650-700||Warm few hours (according to the size of object), mostly four hours are enough and cool slowly in the furnace|
|Annealing to lower tension||600-650||Warm 1 to 2 hours and cool slowly in the furnace|
|Hardening||in air||860-900||Bigger and more rugged tools|
|in oil||830-870||Cool in oil up to about 100 °C|
|Tempering||450-650||Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart|
Chart of tempering values depending on the hardness:
Round bars: D21 - D605
In stock also in the heat-treated variation.
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.
We supply these grades of steel: St52.3, C45, 16MnCr5, 42CrMo4