20MnB4 1.5525 - EN 10263-4-2017

Grade	20MnB4
European Standard Steel Grade	1.5525
Corresponding Standard	EN 10263-4-2017 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

1 Approximate Comparison Table structural alloy steel

2 Approximate Comparison Table

China		Japan	United States	International Organization for Standardization	European Standard
GB	ISC	JIS	ASTM/AISI	ISO	EN
ML20MnB GB/T 6478-2015 GB/T 6478-2001	A71204	SWRCHB 320 JIS G3508.1-2010	10B22 ASTM A29/A29M-12 ASTM A510/A510M-13	CE20BG2 ISO 4954-1993	20MnB4 EN 10263-4-2001

3 Approximate Comparison Table

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
20 MnB4	20 MnB4	1.5525

20MnB4 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"!