| Internal Grade | SAE/AISI | IS | BS 970:1955 | BS 970:1983 | EN | JIS | DIN | GOST | ISO | AFNOR | GB/T | UNI | SS | CSA | AS/NZS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BR52100 | 52100 | 103Cr1 | 534A99 535A99 | — | EN31 | SUJ2 | 100Cr6 | ШХ15 (ShKh15) | 683/III-C | 100C6 | GCr15 | 100Cr6 | 2258 | G52100 | AS 1444 52100 |
| BR100Cr6 | — | — | 534A99 | 535A99 | — | — | 100Cr6 | ШХ15 | — | 100C6 | GCr15 | 100Cr6 | 2258 | — | AS 1444 100Cr6 |
Note: 100Cr6 / SAE52100 and equivalents are high carbon chromium steels used in bearing applications due to their hardness and wear resistance. While chemical compositions are nearly identical, differences may exist in cleanliness (inclusion content), heat treatment response, and specific mechanical properties across standards. GB/T’s GCr15 and GOST’s ШХ15 are widely used in rolling-element bearings.