18MnB4 1.5521 - EN 10263-3-2017

Grade	18MnB4
European Standard Steel Grade	1.5521
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

18MnB4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cu	B
Minimum Value	0.16	-	0.9	-	-	-	0.0008
Maximum Value	0.2	0.3	1.2	0.025	0.025	0.25	0.005

18MnB4 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
Bars, rods, wire; 5<d≤40	Untreated (+U)	≤580	≥55
Bars, rods, wire; 5<d≤40	Spheroidizing or Spheroidizing + Rotary Peeling (+AC or +AC+PE)	≤500	≥64
Bars, wire; 5<d≤10	Untreated and Cold Drawn (+U+C)	≤680	≥53
Bars, wire; 10<d≤40	Untreated and Cold Drawn (+U+C)	≤670	≥53
Bar, wire; 2<d≤5	Untreated, Cold Drawn, and Spheroidized (+U+C+AC)	≤500	≥64
Bar, wire; 5<d≤40	Untreated, Cold Drawn, and Spheroidized (+U+C+AC)	≤480	≥64
Bar, wire; 2<d≤5	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤540	≥62
Bar, wire; 5<d≤40	Untreated, Cold Drawn, Spheroidizing Treatment, and Tempered Rolling (+U+C+AC+LC)	≤520	≥62
Bars, wire; 5<d≤10	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤600	≥59
Bars, wire; 10<d≤40	Spheroidizing Treatment and Cold Drawing (+AC+C)	≤590	≥59

Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
18MnB4	18MnB4	1.5521

18MnB4 Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!