20MoCr4 1.7321 - DIN EN 10263-3-2018

Grade	20MoCr4
Germany W-Nr.	1.7321
Corresponding Standard	DIN EN 10263-3-2018 Steel Rod, Bars and Wire for Cold Heading and Cold Extrusion Part 3: Technical Delivery Conditions for Case Hardening Steels
Classification	Alloy Steel

20MoCr4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo
Minimum Value	0.17	-	0.7	-	-	0.3	-	0.4
Maximum Value	0.23	0.3	1	0.025	0.025	0.6	0.25	0.5

20MoCr4 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)			140~187
Bars; 5<d≤40	Spheroidizing (+AC)	≤560	≥60
Bar, wire; 2<d≤5	Untreated, Cold Drawn, Spheroidizing Treatment (+U+C+AC)	≤560	≥62
Bar, wire; 5<d≤40	Untreated, Cold Drawn, Spheroidizing Treatment (+U+C+AC)	≤540	≥62
Bar, wire; 2<d≤5	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤600	≥60
Bar, wire; 5<d≤40	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤580	≥60
Bars, wire; 5<d≤10	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤670	≥57
Bars, wire; 10<d≤40	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤660	≥57

Approximate Comparison Table Case-Carburized Bearing Steel

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

20MoCr4 Corresponding Standards(Same grade name, different standards)

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