1: 52100 steel introduction
AISI/ASTM 52100 bearing steel is a high carbon, chromium containing low alloy steel that is through hardening and noted in particular for use as bearings.
52100 bearing steel is one kind of special steel with features of high wear resistance and rolling fatigue strength. High-carbon chromium bearing steel, engineering steel and some types of stainless steel and heat resistant steel are used as materials of bearings and for other purpose
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2: 52100 Steel equivalent
| Country | Japan | Germany | Britain | USA | 
| Standard | JIS G4805 | DIN 17230 | BS970 | ASTM A29 | 
| Grade | SUJ2 | 100Cr6/1.3505 | EN31/535A99 | 52100 | 
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | 
| 52100 | 0.93-1.05 | 0.15-0.35 | 0.25-0.45 | 0.025 | 0.015 | 1.35-1.6 | 0.1 | 0.25 | 
| 100Cr6 | 0.90-1.05 | 0.15-0.35 | 0.25-0.45 | 0.030 | 0.025 | 1.35-1.6 | / | 0.25 | 
| SUJ2 | 0.95-1.1 | 0.15-0.35 | 0.5 | 0.025 | 0.025 | 1.3-1.6 | / | 0.4-0.7 | 
| EN31 | 0.95-1.1 | 0.15-0.35 | 0.4-0.7 | / | / | 1.2-1.6 | / | 0.4-0.7 | 
| Size | Round | Dia 6-1200mm | 
| Plate/Flat/Block | 
Thickness
 6mm-500mm  | 
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Width
 20mm-1000mm  | 
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Application | 52100 bearing steels are used for Bearing Manufacture, CV joints, ball screws, gauges, knife etc. | |
6: Delivery condition
For hot forged  bar, usually the delivery condition is hot forged, annealed, rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot rolled sheet, usually the delivery conditon is hot rolled, annealed, black surface.
For cold drawn sheet, usually the delivery condition is cold drawn, annealed, black surface.
 
Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.