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52100
MATERIAL SPECIFICATIONS: DIN 17230 (1980)
CHEMICAL COMPOSITION (WEIGHT %)
C (%): 0.93~1.05
Si (%): 0.15~0.35
Mn (%): 0.25~0.45
P (%)≤: 0.025
S (%)≤: 0.015
Cr (%): 1.35~1.60
Mo (%): —
Other(%): Al ≤0.050, Cu ≤0.30
DIFFERENT HARDNESS OF BEARING STEEL
Annealed condition ≤HBS: 207
Quenched condition HRC| water quenched: 66
Quenched condition HRC| oil quenched: 65
HRC|100℃: 64
HRC|150℃: 63
HRC|200℃: 62
HRC|250℃: 59
HOT WORKING AND HEAT TREATMENT
Hot working temperature /℃: 1100~850
Heat treatment temperature /℃|annealed: 780~800
Heat treatment temperature /℃|normalized: 870~900
Heat treatment temperature /℃|quenched: 800~830water,830~870oil
Heat treatment temperature /℃|tempered: 150~170