H13
OtherH13
Hot-work tool steel. (YB/T 5301; equiv ASTM A681 / DIN 1.2344 / JIS SKD61 / GB 4Cr5MoSiV1). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.32 |
|---|---|
| CR | 4.75 |
| MO | 1.1 |
| V | 0.8 |
| SI | 0.8 |
| MN | 0.2 |
| P | 0.03 |
| S | 0.03 |
Mechanical Properties
Hardness(annealed):≤229 HB;Hardness(hardened):48-55 HRC
Chinese Standard
T 5301 H13
Equivalent Standards
ASTM A681
Equivalent Grades
DIN 1.2344 / JIS SKD61 / GB 4Cr5MoSiV1
Applications
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Available Forms
Block"
Uses
Tool and die steel for cutting, forming, punching and molding tools. Tungsten/molybdenum (≈0%/1.425%) give hot hardness and red-hardness for high-speed and hot-work tools. High chromium (≈5.125%) provides wear resistance and secondary hardening. Applied to blanks, punches, extrusion dies, shear blades, plastic-mold and cold-work tooling.
Heat Treatment
Hot-work: preheat 800 °C, austenitize 1020–1080 °C, quench, temper 540–620 °C (multiple) for hot hardness and thermal fatigue resistance.
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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