W. NR. 1.2080
Characteristics
High-alloy chrome steel with big hardenability for hardening in oil and in air, especially high resistance to the wear both by metal and by mineral substances, good cutting power, very high hardness in the pressure, significantly low toughness especially in traverse, significant carbide spacing. This steel has a good dimensional stability during the heat treatment but the change of dimensions is bigger than by the steel 1.2842. The steel is sensitive to the fast and uneven heating, suitable for hardening on the secondary hardness (the possibility of nitriding). Further the steel is brushed with big difficulties, at the heat it is forged with big difficulties and it has a rather difficult workability in the annealed state.
Suitability
Tools for cold cutting, i.e. all kinds of tools with a high durability for cutting on presses and punching of materials of smaller thicknesses and materials of high hardness (especially difficult-shape tools for cutting e.g. transformer metal sheets and metal sheets from stainless steel), blades for sheet shears and strip steel into the thickness of about 4 mm, blades for wire cutting etc. Tools for mechanical working such as e.g. smaller girders and tools for drawing, all kinds of simple tools for transformation and punching of materials of smaller thicknesses by which an additional stress by bending or on tearing does not occur. Further the steel is suitable for simple and symmetric tools for extrusion and pushing, tools for thread rolling, plain and profile rollers, swages and also for hot work. Cutting instruments such as broaches, profile knives and difficult-shape milling machines for lower cutting speeds and for cutting of nonmetallic abrasive materials. Further the steel can be applied during the production of small molds with a high durability for mechanical working of plastic and powder substances, glass, porcelain and ceramic materials. By instruments for crushing and grinding it is used for hammers of crushers and jaws for soft grinding and crushing.
Chemical composition of steel W.Nr. 1.2080
| 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 X210Cr12 | 1,90-2,20 | 0,15-0,45 | 0,10-0,40 | 11,00-12,00 | 0,030 | 0,030 | 248 | 60 | |||||
| ČSN 19436 | 1,80-2,05 | 0,20-0,45 | 0,20-0,45 | 11,00-12,50 | 0,50 | 0,030 | 0,035 | 250 | 61 | ||||
Heat treatment of steel W.Nr. 1.2080
| 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 | 800-840 | 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 oil | 930-960 | Cool difficult-shape instruments in oil at the temperature of about 80 degrees Celsius or thermally in bath at the temperature of about 400-450 degrees Celsius or in air. | |
| Hardening in air | 950-980 | Cool difficult-shape instruments in oil at the temperature of about 80 degrees Celsius or thermally in bath at the temperature of about 400-450 degrees Celsius or in air. | |
| Tempering | 180-250 | Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart | |
Note
- Warm thicker cross-sections at the hardening temperature for at least 20 minutes. During the hardening to the secondary hardness (nitriding tools etc.) the hardening temperature of about 1080 °C and the tempering temperature of about 500 °C are used.
Chart of tempering values depending on the hardness:
| °C | 100 | 200 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|---|
| HRC | 63 | 62 | 59 | 57 | 54 | 46 |
Graph
Product range
Round bars: D4 - D403
Blocks: 455x605, 305x505
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.
