ШХ21
Alloy SteelШХ21
Russian GOST bearing steel.
Chemical Composition (%)
| C | 0.95 |
|---|---|
| SI | 0.3 |
| MN | 1.1 |
| CR | 1.3 |
| P | 0.027 |
| S | 0.02 |
Applications
International high-end steel grade for aerospace, oil & gas, defense or engineering machinery.
Available Forms
Bar, plate, sheet, tube, forgings, strip, wire, powder
Uses
High-carbon chromium bearing steel for rolling-element bearings, races and precision balls/rollers. Combines high hardness, fatigue life and dimensional stability; also used for gauges, needles and wear parts.
Heat Treatment
Spheroidize anneal (760–780 °C), austenitize 830–860 °C oil quench, temper 150–180 °C to 60–66 HRC; stabilising treatments improve dimensional stability.
Precautions
Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating).
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