Available Shapes
1.2550 Tool Steel
1.2550 / 60WCRV8 / AISI S1 tool steel suppliers and stockholders delivering to the whole of the Middle East. Nifty alloys LLC are stockholders and suppliers of grade 1.2550 in round bar. As a shock resisting steel it is suited for both hot and cold work applications. The tungsten content of this steel grade confers fatigue resistance, the chromium content provides depth of hardness and resistance to abrasion. It is suitable for cold work tools subject to heavy shock. 1.2550 is also used with great success for chisels and punches required for heavy work on hard and tough materials. Suitable for hot work applications where high fatigue strength with medium hot hardness is desirable. Tools made from this grade can be water cooled in service with minimal risk of cracking.
Applications
Analysis
Forging
Annealing
Stress Relieving
Hardening
Tampering
Applications
Typical applications include mandrel bars for drawing steel tubes, swaging, also punching, piercing, trimming dies and shear blades, forming and gripper dies.
Analysis
| Carbon | 0.55-0.65% | Chromium | 0.90-1.20% |
| Manganese | 0.15-0.45% | Silicon | 0.70-1.00% |
| Tungsten | 1.70-2.20% | Phosphorous | 0.03% max |
| Vanadium | 0.10-0.20% | Sulphur | 0.03% max |
Forging
Heat the steel carefully to a temperature of 1000-1050°C and forge with light rapid blows. Reheat when temperature falls below 900°C if further work remains to be done. After forging, cool slowly, ideally in a furnace.
Annealing
Heat the component slowly and uniformly to 800-810°C. Soak thoroughly for two to three hours and cool slowly in the furnace.
Stress Relieving
If the machining operations have been severe, we recommend stabilising just before the tool components are finish machined to relieve machining strains. Heat slowly to a temparature of 700°C, allow to cool in air.
Hardening
Preheat at 650°C followed by rapid increase of temperature to 900-950°C. Quench in oil. Tempering of this grade is always recommended after hardening.
Tampering
Heat slowly to the required tempering temperature, soak thoroughly for two hours per 25mm section and allow to cool in air. For hot work applications, a minimum tempering temperature of 550°C should be used.
| Temperature [°C] | 150 | 200 | 250 | 350 | 400 |
| Hardness [HRc] | 58-56 | 56-54 | 55-53 | 53-51 | 52-49 |
We never share your information