– Heat Treatable –
Altair® VAR
VARed (ESR in vacuum) modified hot work tool steel with excellent toughness.
Chemical Composition
| NO | ~W. No | C | Si | Cr | Mo | V |
|---|---|---|---|---|---|---|
| Altair VAR | 2340 Mod VAR / 2343 Mod VAR | 0,36 | 0,2 | 5,0 | 1,40 | 0,50 |
Material Properties
- Excellent toughness and ductility,
- Very good thermal checking resistance
- High hot strength and tempering back resistance.
- Very good thermal shock resistance.
- Excellent cleanliness
- Good weldability.
- Good machinability.
- Up to 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
- Preferred for all dies and tools requiring high toughness and ductility
- Cores and cavities for long run die casting dies.
- Die casting dies:
- Complex geometries.
- Sections subjected to breaking risks.
- Against to thermal fatigue cracks.
- Dies and Cores in press forging dies,
- Warm forging dies.
- Precision Plastic injections molds,
- High gloss plastic injection moulds,
- Molds for piano black surfaces such as headlights lens molds.
- Molds for abrasive polymers and reinforced resins.
- Cutting and shearing blades thicker than 10 mm.
- Cold forging and cold extrusion dies.
Heat Treatment
| HEAT TREATMENT | TEMPERATURE |
|---|---|
| Soft Annealing | 740-780°C |
| Stress Relieving | 600-650°C |
| Hardening | 1000-1030°C |
| Tempering | 550-650°C |
Physical Properties
| 20°C | 400°C | 600°C | |
|---|---|---|---|
| Elastic Modulus [kN/mm²] | 205.000 | 175.000 | 145.000 |
| Thermal Expansion Coefficient [10ˉ6/K] | 11,8 | 12,7 | 12,9 |
| Thermal Conductivity [W/mK] | 29 | 30 | 33 |
Mechanical Properties
| 44 Hrc | 48 Hrc | 50 Hrc | |
|---|---|---|---|
| Yield Strength Rp02 [N/mm²] | 1200 | 1400 | 1500 |
| Tensile Strength, Rm | 1500 | 1680 | 1800 |
Properties
Toughness values
Impact resistance values obtained from samples oil hardened to 44-46 HRc and twice tempered:
| Test | Bölge | Isı | Ortalama |
|---|---|---|---|
| KV | External zone | 20°C | 28 (Joule) |
| KV | Core zone | 20°C | 28 (Joule) |
| KVW | External zone | 20°C | 380 (Joule) |
| KVW | Core zone | 20°C | 365 (Joule) |
Delivery Condition
Max. 220 HB, Soft Annealed.
Tempering Graph
