Name: martensitic stainless steel
Standard: AISI, ASTM
Model: 420F
UNS Number: S42020
● 420F features and applications:
420F Stainless steel is easy to improve the cutting performance of 420J2 steel.
● 420F chemical composition ①:
Carbon C: 0.30 ~ 0.40
Manganese Mn: ≤ 1.25
Si Si: ≤ 1.00
Chromium Cr: 12.0 ~ 14.0
Ni-Ni ②: ≤ 0.50
Phosphorus P: ≤ 0.06
Sulfur S: ≥ 0.15
Mo Mo ③: ≤ 0.06
Note: ① single value unless otherwise stated herein, are the highest value; ② pipe technology for some time, some types of austenitic stainless steel containing nickel must be slightly higher than the values shown in the table; ③ free; ④ the highest amount of Ta containing 0.10%; ⑤ the highest content of 0.75%; ⑥ the highest content of 0.70%
