What would be a JIS steel that is very close to our 4820?
What would be a JIS steel that is very close to our 4820?
(OP)
Right now we are using JIS 420 and are not real happy with the durability of the gears and are looking for an alterative.





RE: What would be a JIS steel that is very close to our 4820?
SCM 420 (JIS G4105) SAE 4820 (SAE J404)
C = 0.18-0.23 0.18-0.23
Si = 0.15-0.35 0.15-0.35
Mn = 0.60-0.85 0.50-0.70
P & S = 0.030 0.030 & 0.040
Cr = 0.90-1.20 0.20 max
Mo = 0.15-0.30 0.20-0.30
Ni = 0.25 max 3.25-3.75
SAE 4820 is a very deep hardening grade. I recommend you investigate the following JIS grades for improved hardenability: SNC 815H (JIS G4052) or SNCM 420 (JIS G4103).
RE: What would be a JIS steel that is very close to our 4820?