Sirio® VAR
VAR (Vacuum Arc Remelted) and modified 1.2367 Hot Work Tool steel with excellent hot properties and ductility designed for tough conditions.
Chemical Composition
| No | ~W. No | C | Si | Cr | Mo | V | Diğer |
|---|---|---|---|---|---|---|---|
| Sirio® VAR | 1.2367 Mod VAR | 0,32 | 0,2 | 5,1 | 2,35 | 0,55 | + |
Material Properties
- Excellent hot strength and tempering back resistance.
- Very good creep resistance
- Very good heat checking resistance.
- High Toughness and ductility.
- Very good thermal shock resistance.
- Excellent cleanliness
- Good Weldability,
- Good machinability.
- Up tp 54 HRc after heat treatment
- Recommended working hardness 44-52 HRc.
- Good nitriding and coating ability
Certificate
Highly certified grade, and many properties’ quality is guaranteed by the certifying supplier company such as toughness, microstructure cleanness and many more.
Applications
- Long life die casting dies, cores, cavities and inserts.
- Die casting dies:
- Against to thermal fatigue cracks
- Against to gross cracking
- If there is a high velocity in the runner and also inside the cavity
- If it is matter of wall thickness and complex geometry.
- Dies with complex geometry.
- If it is very cosmetic Al part
- PVD coated insert against to soldering.
- Cores in press forging dies.
- Warm forging dies.
- Hot stamping dies.
- Aluminum extrusion dies and tools.
- Preferred for dies and tools operating at high temperatures.
- Punches, cutting and shearing blades thicker than 10 mm.
- Cold forging and cold extrusion dies.
Heat Treatment
| HEAT TREATMENT | TEMPERATURE |
|---|---|
| Soft Annealing | 630-800°C |
| Stress Relieving | 600-650°C |
| Hardening | 1000-1050°C |
| Tempering | 530-700°C |
Physical Properties
| 20°C | 400°C | 500°C | |
|---|---|---|---|
| Elastic Modulus [kN/mm²] | 205.000 | 190.000 | |
| Thermal Expansion Coefficient [10ˉ6/K] | 12,4 | 13,2 | |
| Thermal Conductivity [W/mK] | 21 | 30 | 32 |
Mechanical Properties
| 44 Hrc | 48 Hrc | 50 Hrc | |
|---|---|---|---|
| Yield Strength Rp02 [N/mm²] | 1200 | 1400 | 1500 |
| Tensile Strength, Rm | 1500 | 1680 | 1800 |
Properties
Toughness Value
Impact resistance values obtained from samples oil hardened to 44-46 HRc and twice tempered:
Continuous Cooling Diagram
Delivery Condition
Max. 220 HB, Soft Annealed.
Tempering Graph
