To ensure bearings quality, we only buy bearings material from reputable, authorized, and large steel plant, and each material will be strictly inspection before production.The following materials especially GCr15SiMn are widely used in our bearing series.
Chemical Composition of Steels for WRT bearings
| Element | C | Si | Mn | Cr | Ni | Mo | P | S | Cu |
| GCr15 | 0.95~1.05 | 0.15~0.35 | 0.25~0.45 | 1.40~1.64 | --- | --- | <=0.025 | <=0.025 | --- |
| GCr15SiMn | 0.95~1.05 | 0.45~0.75 | 0.95~1.25 | 1.40~1.64 | --- | --- | <=0.025 | <=0.025 | --- |
| G20CrNi2Mo | 0.17~0.23 | 0.15~0.40 | 0.40~0.70 | 0.35~0.65 | 1.60~2.00 | 1.60~2.00 | <=0.030 | <=0.030 | <=0.25 |
| G20Cr2Ni4 | 0.17~0.23 | 0.15~0.40 | 0.30~0.60 | 1.25~1.75 | 3.25~3.75 | --- | <=0.030 | <=0.030 | <=0.25 |
| 50Mn | 0.48~0.56 | 0.17~0.37 | 0.70~1.00 | --- | --- | --- | --- | --- | --- |
| 42CrMo | 0.38~0.45 | 0.17~0.37 | 0.50~0.80 | 0.90~1.20 | --- | 0.15~0.25 | --- | --- | --- |
| WRT (China) | ASTM(USA) | DIN(GERMANY) | JIS(JAPAN) |
| GCr15 | AISI 52100 | DIN100Cr6 | JIS SUJ2 |
| GCr15SiMn | DIN100CrMn67 | JIS SUJ3 | |
| G20CrNi2Mo | AISI 4320 | JIS SNCM415 | |
| G20Cr2Ni4 | AISI 3316 | ||
| 50Mn | AISI 1551 | ||
| 42CrMo | DIN 42CrMo4 | JIS SCM 440 |
