Grade 20MoCr4
Corresponding Standard DIN EN ISO 683-3-2019
Heat-treatable steels,alloy steels and free-cutting steels--Part 3: Case-hardening steels
Classification Alloy Steel
Properties Carburizing Ability
20MoCr4 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu Mo
Minimum Value 0.17 0.1 0.7 - - 0.3 - 0.4
Maximum Value 0.23 0.4 1 0.025 0.035 0.6 0.4 0.5
20MoCr4 Mechanical Properties
condition Heat Treatment or Condition
Hardness
HBW
Rough, Bar Steel Processed to a Certain Shearability (+S) ≤255
All product shapes Soft Annealing (+A) ≤207
Bars, wire, plates, forgings; d≤150 Processed to a Certain Hardness (+TH) 156~207
Bar, Plate, Forging Processed to Ferrite-Perlite Structure (+FP) ≥140
Approximate Comparison Table
China United States International Organization for Standardization Germany European Standard
GB ISC ASTM/AISI ISO DIN EN/DIN W-Nr. EN Numerical Grade
G20CrMo B10200 A534 4118H ≈20MnCrMo4-2
(B27)
20MoCr4
20MoCr4 1.7321 20MoCr4 1.7321

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