EN31/AISI 52100

EN31/AISI 52100

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

  1. Standard high-speed steel grade
  2. Contains well-balanced alloy composition
  3. High toughness
  4. Great cutting edge retention
  5. Superior hardness, 60-67 on Rockwell hardness scale (Rc) at room temperature
  6. High carbon chrome alloy steel
  7. Operates continually at temperatures up to 120°C
  8. Used to produce precision ball bearings and roller bearings
  9. Cost-effective
  10. 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