Characteristics
Chrome–nickel–vanadium steel with high hardenability for hardening in oil, very good toughness at a relatively high hardness, very good resistance to the wear, very good resistance to the stress by pressure, shocks and hits, rather difficult ductility during the heat and good workability in the annealed state.
Suitability
Tools for cold mechanical working, i.e. highly stressed tools for punching (coins, parts of watches, brooches etc.), calibration and stuffing of small parts (deep shapes and a high stress on tearing), asymmetric tools for extrusion and pushing (stressed by additional bending stress). Tools for crushing such as hammers into crushers requiring higher toughness. Further the steel is suitable for middle-size molds for working of plastics which are mechanically highly stressed.
Chemical composition of steel W. Nr. 1.2718
| Steel grade | Chemical composition in % | Hardness in the state | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| soft-annealed | heat-treated | ||||||||||||
| C | Mn | Si | Cr | W | Mo | V | Ni max | Co | P max. | S max. | HB max. | HRC min. | |
| DIN 55NiCr10 | 0,50-0,57 | 0,40-0,50 | 0,15-0,30 | 0,50-0,70 | 2,50-3,00 | 0,035 | 0,035 | 229 | 57 | ||||
| ČSN 19 614 | 0,50-0,60 | 0,40-0,70 | 0,20-0,40 | 0,60-0,90 | 0,07-0,15 | 2,30-2,80 | 0,030 | 0,035 | 230 | 56 | |||
Heat treatment of steel W. Nr. 1.2718
| Way | Temperature [°C] | Procedure | |
|---|---|---|---|
| Forging | 850-1050 | Cool slowly in calm air or better e.g. in dry ash or other thermally-insulated material | |
| Soft annealing | 620-650 | 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 | 790-830 | Oil | |
| Tempering | 100-300 | Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart | |
Note
- Temperatures of transformations
- Ac1 ............... asi 700 °C
- Ac3 ............... asi 760 °C
- Ms ................ asi 200 °C
Chart of tempering values depending on the hardness:
| °C | 100 | 200 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|---|
| HRC | 58 | 56 | 52 | 47 | 44 | 39 |
Graph
Product range
Round bars: D40 - D90
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