Grade GCr15Z
Corresponding Standard GJB 6484-2008
Specification for High-carbon Chromium Bearing Steel for Military
Classification Bearing Steel
GCr15Z Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo As * Ti Pb * Sn * Sb *
Minimum Value 0.95 0.15 0.25 - - 1.4 - - - - - - - -
Maximum Value 1.05 0.35 0.45 0.025 0.015 1.65 0.25 0.25 0.1 0.04 0.003 0.002 0.03 0.005
GCr15Z Mechanical Properties
form Heat Treatment or Condition
Tensile Strength
σb
Mpa
Hardness
HBW
Round Steel Spheroidizing or softening annealing 179~207
Coil Bar d > 10 Spheroidizing Annealing 179~207
Coil Bar d ≤ 10 Spheroidizing Annealing 590~760
Wire d>10 Annealing 183~217
Wire d≤10 Annealing 590~760
Wire d>10 Annealing + Light drawing, annealing + Phosphating light drawing, or annealing + Polishing ≤229
Wire d≤10 Annealing + Light drawing, annealing + Phosphating light drawing, or annealing + Polishing ≤850

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