20MnB4 1.5525 19MnB4 1.5523 - DIN EN 10263-4-2018

Grade	20MnB4
Germany W-Nr.	1.5525
Old Grade
Corresponding Standard	DIN EN 10263-4-2018 Steel rod, bars and wire for cold heading and cold extrusion Part 4: Technical delivery conditions for steels for quenching and tempering
Classification	Alloy Steel

20MnB4 Chemical Element Composition Content (%)

Component	C	Si ^ⓔ	Mn	P	S	Cr ^ⓕ	Cu	B
Minimum Value	0.18	-	0.9	-	-	-	-	0.0008
Maximum Value	0.23	0.3	1.2	0.025	0.025	0.3	0.25	0.005

20MnB4 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
Bar, rod, wire; 5<d≤25	Untreated or Pickling (+U or +PE)	≤580	≥60
Bar, rod, wire; 5<d≤25	Spheroidizing or Spheroidizing and Peeling (+AC or +AC+PE)	≤500	≥66
Wire; 5<d≤10	Untreated and Cold Drawn (+U+C)	≤680	≥55
Wires; 10<d≤25	Untreated and Cold Drawn (+U+C)	≤670	≥55
Wire; 2<d≤5	Unheated, Cold Drawn, and Spheroidized (+U+C+AC)	≤490	≥68
Wire Rods; 5<d≤25	Unheated, Cold Drawn, and Spheroidized (+U+C+AC)	≤480	≥68
Wire; 2<d≤5	Unheated, Cold Drawn, Spheroidized, and Quenched Rolling (+U+C+AC+LC)	≤530	≥66
Wire Rods; 5<d≤25	Unheated, Cold Drawn, Spheroidized, and Quenched Rolling (+U+C+AC+LC)	≤520	≥66
Wire; 5<d≤10	Spheroidizing + Cold Drawn (+AC+C)	≤600	≥61
Wires; 10<d≤25	Spheroidizing + Cold Drawn (+AC+C)	≤590	≥61

New and Old Grade Replacement List

Corresponding Standard	Grade
DIN 1654-4-1989	Grade Germany W-Nr.
DIN EN 10263-4-2018	Grade Germany W-Nr. Old Grade Old Grade

20MnB4 Corresponding Standards(Same grade name, different standards)

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