100Cr6 (1.3505)

 

With good hardenability, 100Cr6 allows for effective hardening on sections up to 30 mm in diameter, ensuring a homogeneous martensitic structure with high surface hardness. In its hardened and tempered state, the material exhibits excellent surface hardness (58–62 HRC), which ensures high resistance to contact wear and rolling fatigue. In the spheroidized (globular) annealed state, the steel offers good machinability with machine tools, favoring the optimization of production cycles before hardening. Even after heat treatments, the steel maintains its non-deformability and tight tolerances, essential qualities for high-precision rolling components, guaranteeing good dimensional stability.

 

Typical Applications:
• Rollers and balls for small and medium-sized bearings
• Races and rings for ball bearings, roller bearings, and needle roller bearings
• Small cylinders for cold rolling
• Spindles, cams, and rotating components for textile machinery
• Precision shafts, slewing rings, and wear-prone supports

100CrMo7-3 is a variant of 100Cr6 alloyed with Molybdenum (Mo) and Nickel (Ni), and slightly higher Manganese (Mn) and Chromium (Cr) content. Compared to 100Cr6, 100CrMo7-3 has greater grain refinement and increased hardenability for the same carbon content. It is preferred for larger diameters or heavier loads, maintaining high hardness deeper within the part. 100CrMo7-3 is used when deep hardening is required: large bearings or large gears, heavy-duty rollers, where the increased fatigue resistance and toughness induced by Molybdenum are exploited.