·                            Applications: 440C stainless steel balls are usually used for precision and corrosion performance are demanding industries: aviation, aerospace, bearings, motors, high precision instruments, valves, oil.

·                            Features: microstructure is martensitic steel, the production process are higher, domestic enterprises can produce less stainless steel 440C, 440C material it can produce is often labeled a special stainless steel business reputation. Heat treatment process more complicated, easy to crack, with high precision, is the most hard a steel ball stainless steel ball: HRC ≧ 58. Hardness close to the bearing balls, but stronger than the former anti-rust, anti-corrosion properties.

·                            Comparison: more than 440 stainless steel ball with the rust, corrosion resistance, hardness and enhanced wear resistance is also increased.

Chemical composition of 404C stainless steel ball
C	0.95-1.20%
Cr	16.0-18.0%
Si	1.00%
Mn	1.0% Max.
P	0.040%
S	0.030%
Mo	0.075% Max

 

Physical properties of 404C stainless steel ball
Tensile strength	285,000 psi
Yield strength	275,000 psi
Elastic	29,000,000 psi
Density	0.277 lbs/cubic inch