1.2550
Alloy Steel1.2550
1.2550 supplied by Shanxi Youte Steel (jlhsteel.net).
Chemical Composition (%)
| C | 0.5 |
|---|---|
| MN | 0.7 |
| CR | 0.9 |
| W | 1.7 |
| V | 0.1 |
Chinese Standard
DIN EN ISO 4957
Equivalent Grades
60WCrV7
Available Forms
Bar, Plate, Tube, Forging, Wire
Uses
Tool and die steel for cutting, forming, punching and molding tools. Tungsten/molybdenum (≈1.9%/0%) give hot hardness and red-hardness for high-speed and hot-work tools. High chromium (≈1.05%) provides wear resistance and secondary hardening. Applied to blanks, punches, extrusion dies, shear blades, plastic-mold and cold-work tooling.
Heat Treatment
Powder/HSS: preheat 800–850 °C, austenitize 1180–1230 °C (salt or vacuum), quench, triple temper 540–570 °C to ≈64–66 HRC.
Precautions
Risk of quench cracking and distortion — use graded preheating, controlled cooling and multiple tempers. Avoid overheating the austenitizing temperature. Machine in the soft annealed condition; allow for dimensional change after heat treatment. Grind with coolant to prevent rehardening cracks.
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