Introduction:
1.2550 Cold work steel with very good toughness, dimensionally stable, impact resistant, high hardening capacity. Similar with AISI S1.
Applications:
Typical applications include mandrel bars for drawing steel tubes, swaging, also punching, piercing, trimming dies and shear blades, forming and gripper dies.
Quality Standard:
BS-EN-ISO-4957-2000 Tool Steel
All Grades Comparison:
ASTM |
Material No. |
EN |
| S1 |
1.2550 |
60WCrV8 |
Chemical Composition(%)
Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
V |
W |
| S1 |
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 |
| 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 |
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.
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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