GCr15 is a high-carbon chromium bearing steel known for its high hardness, excellent wear resistance, and superior dimensional stability after heat treatment. It is one of the most commonly used bearing steels in both China and international markets. With uniform internal structure and reliable fatigue strength, GCr15 provides consistent performance under heavy loads and high rotational speeds.
Chemical Composition (%):
C: 0.95–1.05
Si: 0.15–0.35
Mn: 0.25–0.45
Cr: 1.40–1.65
P: ≤ 0.025
S: ≤ 0.025
Performance Features
High surface and core hardness after quenching and tempering
Excellent wear resistance and fatigue strength
Uniform microstructure for precision machining
Stable dimensional accuracy under continuous operation
Suitable for both cold and hot processing
Applications
GCr15 steel is mainly used to produce:
Bearing rings and rolling elements (balls and rollers)
Precision measuring tools and gauges
Automotive components such as hubs and shafts
Machine tool spindles and transmission parts
Wear-resistant mechanical components in high-load systems
Equivalent Standards:
ASTM: 52100
DIN: 100Cr6 / 1.3505
JIS: SUJ2
Reliable Supply from ChinaSpecSteel
ChinaSpecSteel supplies GCr15 bearing steel directly from Jiyuan Iron & Steel Group, one of China’s leading producers of high-grade special steel. The steel is produced through a long-process route with advanced melting, refining, and rolling facilities to ensure consistent chemical composition and microstructure control.
Advantages:
Hot rolled and forged GCr15 bars with optional spheroidizing annealing
Precision and heat-treated grades available for bearing production
Third-party inspection (SGS, BV) and MTC provided
Custom sizes and OEM machining support
Factory-direct pricing and stable export logistics
Supply Forms:
Round bars and wire rods
Forged rings and bearing blanks
Heat-treated or spheroidized bars
About Jiyuan Iron & Steel
Jiyuan Iron & Steel Group operates a long-process integrated production system, combining ironmaking, steelmaking, and rolling. With advanced quality inspection and process control, its production technology ranks among the most advanced in China.
The company is a major production base for special steel bars and wire rods, offering a wide product range including bearing steel, spring steel, cord steel, cold heading steel, gear steel, free-cutting steel, non-quenched and tempered steel, alloy structural steel, carbon structural steel, high-strength wear-resistant steel, tube billet steel, anchor chain steel, and continuous cast iron profiles.
Deep-processed materials include precision wire, heat-treated bars, bright bars, and fasteners, serving customers in automotive, machinery, energy, and industrial equipment industries worldwide.
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