| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A295 | 52100 | 0.93-1.05 | 0.25-0.45 | 0.025 max | 0.015 max | 0.15-0.35 | 0.25 | 1.35-1.60 | 0.1 |
| DIN 17230 | 100Cr6 / 1.3505 | 0.90-1.05 | 0.25-0.45 | 0.030 max | 0.025 max | 0.15-0.35 | 0.3 | 1.35-1.65 | – |
| JIS G4085 | SUJ2 | 0.95-1.10 | 0.5 | 0.025 max | 0.025 max | 0.15-0.35 | – | 1.30-1.60 | – |
| BS 970 | 535A99 / EN31 | 0.95-1.10 | 0.40-0.70 | 0.035 max | 0.030 max | 0.10-0.35 | – | 1.20-1.60 | – |
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
PHYSICAL PROPERTIES
| Thermal Conductivity at °C | W / (m*K) |
| 20 | 44.5 |
| 350 | 45 |
| 700 | 46 |
HEAT TREATMENT
| Soft Annealing °C | 780-800 |
| Cooling | Furnace |
| Hardness HB | max. 207 |
| Stress-relief Annealing °C | 600-650 |
| 1st Pre-Heating °C | up to approx. 400 in an air-circulating furnace |
| 2nd and 3rd | 800 and 900 |
| Hardening °C | 800-820 |
| Quenching | 810°C Oil, Quench |
| Tempering °C | at least twice 150-200 |
| Hardness after Temperature HRC | 61-63 |
SIZE RANGE
ROUNDS – 6 to 450 MM DIA. | SQUARES – 16 to 155 MM
FLATS – THICKNESS -6 to 155 MM | WIDTH -40 to 455 MM
STOCKING PARTNERS
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