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Product Category
AISI440/440C
The microstructure of this steel is martensitic, and its production process has high technical requirements. There are relatively few domestic enterprises capable of producing stainless steel 440C; thus, companies that can manufacture 440C materials often earn the reputation of being special-grade stainless steel producers. The heat treatment process is rather complex and prone to cracking, while also demanding high precision. This steel is the hardest stainless steel ball among all steel balls: its Rockwell hardness (HRC) is ≥58. Its hardness is comparable to that of bearing steel balls, yet it boasts superior rust- and corrosion-resistant properties.
