1.2550 AISI S1 60WCrV8 Cold Work Steel
1.2550 AISI S1 60WCrV8 Cold Work Steel
1 1.2550 Introduction:
1.2550 Cold work steel with very good toughness, dimensionally stable, impact resistant, high hardening capacity. Similar with AISI S1.
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2 1.2550 Applications:
Typical applications include mandrel bars for drawing steel tubes, swaging, also punching, piercing, trimming dies and shear blades, forming and gripper dies.
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3 Quality Standard:
BS-EN-ISO-4957-2000 Tool Steel
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4 All Grades Comparison:
| ASTM | Material No. | EN |
|---|---|---|
| S1 | 1.2550 | 60WCrV8 |
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5 1.2550 Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | V | W |
|---|---|---|---|---|---|---|---|---|---|
| 1.2550 | 0.55-0.65 | 0.70-1.00 | 0.15-0.45 | 0.030 max | 0.030 max | 0.90-1.20 | / | 0.10-0.20 | 1.70-2.00 |
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6 HEAT TREATMENT:
- 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.
- TEMPERING: 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.
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7 Mill′s test certificate:
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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