Grade 20NiCrMo2
Corresponding Standard UNI 8550-1984
Specification Unalloyed and Alloyed Steel Finished Products, Open Die and Drop Forged, for Case Hardening - Qualities, Requirements and Tests
Classification Alloy Steel
20NiCrMo2 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo
Minimum Value 0.17 0.15 0.6 - - 0.35 0.4 0.15
Maximum Value 0.23 0.4 0.9 0.035 0.035 0.65 0.7 0.25
20NiCrMo2 Mechanical Properties
thickness/diameter
t/d
mm
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Impact Energy Absorption
KV2
J
d≤11 1175~1570 ≥930 ≥9 KCU
≥27.5
11<d≤25 885~1225 ≥640 ≥10 ≥30
25<d≤40 785~1080 ≥590 ≥10 ≥30
40<d≤60 685~980 ≥490 ≥11 ≥32

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