Stainless steel bearings are corrosion-resistant bearings made of special alloy steel (such as 304, 440C, etc.), widely used in humid, corrosive environments or areas with high hygiene requirements. Austenitic stainless steel (such as 304)
Non magnetic, highly resistant to chemical corrosion, suitable for scenarios with high hygiene requirements such as food processing and medical equipment
But the mechanical strength is low and not suitable for high load equipment
Martensitic stainless steel (such as 440C)
High hardness (HRC58-60), good wear resistance, suitable for high load equipment such as machine tool spindles
Corrosion resistance is slightly weaker than that of austenite, but the cost is lower
Duplex stainless steel (such as 2205)
Combining high hardness and corrosion resistance, commonly used in harsh environments such as petrochemicals
2、 Core advantages
Corrosion resistance: Chromium content ≥ 12.5%, 304 stainless steel can maintain no rust for 72 hours in salt spray test.
Temperature adaptability: can work at -60 ℃~300 ℃ with lubricant
Convenient maintenance: supports water washing, reduces downtime maintenance frequency
3、 Application scenarios
Wet/corrosive environment: water purifiers, swimming pool equipment, outdoor machinery.
Health sensitive areas: food processing, pharmaceutical equipment
High temperature working conditions: Industrial equipment that requires high temperature resistance.
4、 Purchase suggestions
High load scenario: prioritize 440C material
Cost sensitive: Ordinary bearing steel is more economical in dry environments.
Mixed use: High end equipment can be combined with stainless steel (dust-proof) and bearing steel (load-bearing).
