20NiCrMoS6-4 1.6571 - EN 10263-3-2017

Grade	20NiCrMoS6-4
European Standard Steel Grade	1.6571
Corresponding Standard	EN 10263-3-2017 Steel Rod, Bars and Wire for Cold Heading and Cold Extrusion Part 3: Technical Delivery Conditions for Steels for Case Hardening Steels
Classification	Alloy Steel

20NiCrMoS6-4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.16	-	0.5	-	0.02	0.6	1.4	-	0.25
Maximum Value	0.23	0.3	0.9	0.025	0.04	0.9	1.7	0.25	0.35

20NiCrMoS6-4 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %	Hardness HBW
Bars; 5<d≤40	Processed to Ferrite-Pearlite Structure and Hardness Range (+FP)			149~201
Bars; 5<d≤40	Spheroidizing (+AC)	≤610	≥58
Bar, wire; 2<d≤5	Untreated, Cold Drawn, Spheroidizing Treatment (+U+C+AC)	≤610	≥60
Bar, wire; 5<d≤40	Untreated, Cold Drawn, Spheroidizing Treatment (+U+C+AC)	≤590	≥60
Bar, wire; 2<d≤5	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤650	≥58
Bar, wire; 5<d≤40	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤630	≥58
Bars, wire; 5<d≤10	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤730	≥55
Bars, wire; 10<d≤40	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤720	≥55

20NiCrMoS6-4 Corresponding Standards(Same grade name, different standards)

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