GCr18Mo

Other

GCr18Mo

High-C Cr bearing steel. (GB/T 18254; equiv GB GCr15 / AISI 52100 / DIN 100Cr6 / JIS SUJ2). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.95
SI0.2
MN0.25
CR1.65
MO0.15
P0.025
S0.02

Mechanical Properties

Hardness(annealed):179-207 HB;Hardness(hardened):59-63 HRC

Chinese Standard

T 18254 GCr18Mo

Equivalent Standards

GB GCr15 / AISI 52100 / DIN 100Cr6

Equivalent Grades

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).

Applications

高碳铬轴承钢。,"Bar

Available Forms

Wire

Uses

Tube"

Heat Treatment

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.

Precautions

Spheroidize anneal (760–780 °C), austenitize 830–860 °C oil quench, temper 150–180 °C to 60–66 HRC; stabilising treatments improve dimensional stability.

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