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Grade 18MnB4
Germany W-Nr. 1.5521
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
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
σb
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
18MnB4 Corresponding Standards(Same grade name, different standards)
1 EN 10263-3-2001
18MnB4 1.5521
2 DIN EN 10263-3-2018
18MnB4 1.5521
3 EN 10263-3-2017
18MnB4 1.5521
4 ISO 4954-2018
18MnB4
5 ISO 4954-1-2024
18MnB4

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