Seals Alloy Steel

Material SAE-52100 FC15Cr3MO Ni-Hard
Chemical Composition Forged Steel (ASTM-A 532-II Class B) Cast Iron Cast Iron
C 0.93 - 1.05 3.2 -3.6 3.0 - 3.6
Si 0.15 - 0.35 1.1 - 1.6 0.4 - 0.7
Ni 0.25 Max 1 -2.0 3.5 - 4.3
Cr 1.35 – 1.60 14 – 16 1.2 - 1.7
MO 0.10 Max 2.0 - 4.0 0.4 Max
CO - 0.2 Max -
V - 0.2 Max 0.3 - 0.6
W - 0.2 Max -
P 0.025 Max - 0.3 Max
S 0.015 Max - 0.1 Max
Microstructure Fine Tempered Martensite Cementite Microstructure Eutectic Carbide M7C3 in the Matrix of Martensite
Hardness 59-65 HRc 64 -75 HRc 57 - 64 HRc
Seals Alloy Steel
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