ASTM 4820
2020-04-15 19:28:33| Steel Grade | : | ASTM 4820 |
| Tpye | : | Special quality ball and roller bearing steel①（ASTMA535—1992） |
| CHEMICAL COMPOSITION | ||
| C(％) | : | 0.18～0.23 |
| Si(％) | : | 0.15～0.35 |
| Mn(％) | : | 0.50～0.70 |
| P(％)≤ | : | 0.015 |
| S(％)≤ | : | 0.015 |
| Cr(％) | : | — |
| Mo(％) | : | 0.20～0.30 |
| Ni(％) | : | 3.25～3.75 |
| Other(％) | : | ② |
| Remark： | ||
| ①, The steel grade is AISI/SAE series, the content have been adjusted for P, S and individual Si. | ||
| ②, It should have the following elements in steel if not specified: Cr≤0.20％，Mo≤0.10％，Ni≤0.25％，Cu≤0.35％. | ||
| ③, The whole aluminum and oxygen content should be the following:Alt≤0.050％，O2≤0.0015％. | ||
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ASTM 52100
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ASTM 4720
