Springs Knowledge Discussion
Sprinkle stainless steel passivation of salt resistance time
After the spring stainless steel is passivated, how long can the salt fog test (ASTM B-117) be supported?
The following information is for reference only, and time will be different with processing requirements and product quality.
SUS 301 → 200 hours without corrosion
SUS 302 → 200 hours without corrosion
SUS 303 → 24 hours without corrosion; 200 hours of <1%of the corrosive area
SUS304 → 200 hours without corrosion
Spring SUS 304L → 200 hours without corrosion
Spring SUS 316 → 200 hours without corrosion
Spring SUS 316L → 200 hours without corrosion
SUS 321 → 24 hours without corrosion; 200 hours of <1%of the corrosive area
SUS 347 → 200 hours without corrosion
SUS 410 → 2 hours with a <1%corrosion area; 5%corrosion area of 24 hours; 10%corrosion area in 200 hours
SUS 410X → 2 hours without corrosion; 5-15%of the corrosive area of 24 hours
SUS 416 → 2 hours without corrosion; 2%of the corrosion area of 6 hours; 80%of the corrosive area of 200 hours
SUS 430 → 2 hours without corrosion; 24 hours without corrosion; 200 hours with fine corrosion spots
SUS 430F → 200 hours without corrosion
SUS 431 → 200 hours without corrosion
SUS 440 → 5%of the corrosion area of 2 hours; 10%of the corrosive area of 24 hours
SUS 440A → 2 hours without corrosion; 24 hours with fine corrosion spots
SUS 440C → 1%of the corrosion area of 2 hours; 5%of the corrosion area of 6 hours; 2 to 30%of the corrosive area of 2 to 30%
15-5ph → 2 hours without corrosion; 200 hours of <1%of the corrosion area
15-7PH → 200 hours without corrosion
17-4PH → 200 hours without corrosion
17-7PH → 200 hours without corrosion
Source: http://www.zenda.com.tw/faq/