Tool Steel
EN31 Alloy Steel is a high carbon, chromium containing low alloy steel that is through hardening and noted in particular for use as bearings. AISI 52100 has an excellent high carbon alloy steel which provides a high level of hardness with compressive strength and abrasion resistance. This grade of alloy steel is quite regularly utilized for wear resisting machine constituents and for press instruments.
STEEL PROPERTIES
- Standard high-speed steel grade
- Contains well-balanced alloy composition
- High toughness
- Great cutting edge retention
- Superior hardness, 60-67 on Rockwell hardness scale (Rc) at room temperature
- High carbon chrome alloy steel
- Operates continually at temperatures up to 120°C
- Used to produce precision ball bearings and roller bearings
- Cost-effective
- Long working life
Chemical composition (typical; in weight %)
| C | Si | Mn | P(Max) | S(Max) | Cr |
|---|---|---|---|---|---|
| 0.90-1.20 | 0.10-0.35 | 0.35-0.70 | 0.05 | 0.05 | 1.00-1.50 |
SIZE RANGE
- ROUNDS – 6 to 450 MM DIA. I SQUARES – 16 to 155 MM
- FLATS – THICKNESS -6 to 155 MM I WIDTH -40 to 455 MM
Physical properties (reference values)
| 20°C | 100°C | 200°C | 350°C | |
|---|---|---|---|---|
| Thermal Conductivity at °C | 20 | 350 | ||
| W / (neK) | 44.5 | 45 | 46 |
Heat Treatment
| Soft Annealing °C | Cooling | Hardness HI3 | Stress-relief Annealing °C | 1st Pre-Heating °D | 2nd and 3rd | Hardening °C | Quenching | Tempering °C | Hardness after Temperature HRC |
|---|---|---|---|---|---|---|---|---|---|
| 780-800 | Furnace | max. 207 | 600-650 | up to approx. 400 in an air-circulating furnace | 800 and 900 | 800-820 | 810°C Oil, Quench | at least twice 150-200 | 61-63 |