20MnB4 - ISO 4954-1-2024

Grade	20MnB4
Corresponding Standard	ISO 4954-1-2024 Steels for Cold Heading and Cold Extruding - Technical Delivery Conditions - Part1: Non-Alloy and Alloy Steels
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

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
5＜d≤25	+AR or +PE	≤580	≥60
5＜d≤25	+AC or +AC+PE	≤500	≥66
5＜d≤10	+AR+C	≤680	≥55
10＜d≤25		≤670	≥55
2≤d≤5	+AR+C+AC	≤490	≥68
5＜d≤25		≤480	≥68
2≤d≤5	+AR+C+AC+LC	≤530	≥66
5＜d≤25		≤520	≥66
5＜d≤10	+AC+C	≤600	≥61
10＜d≤25		≤590	≥61

①+AR=as hot-rolled；+AR or +PE=as hot-rolled or peeled；+AR+C=as hot-rolled+cold drawn；+AR+C+AC=as hot-rolled+cold drawn+spheroidized；+AR+C+AC+LC=as hot-rolled+cold drawn+spheroidized+skin passed；+AC= spheroidized ；+AC or +AC+PE=spheroidized or spheroidized+peeled；+AC+C=spheroidized +cold drawn；+FP=treated to ferrite-pearlite structure and hardness range；+AC+C+AC=spheroidized +cold drawn + spheroidized；+AC+C+AC+LC=spheroidized +cold drawn + spheroidized + skin passed

Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

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

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

1	EN 10263-4-2001
	20MnB4 1.5525
2	EN 10269-2013
	20MnB4 1.5525
3	Q/BQB 517-2018
	20MnB4
4	DIN EN 10263-4-2018
	20MnB4 1.5525 (19MnB4) (1.5523)
5	EN 10263-4-2017
	20MnB4 1.5525
6	DIN EN 10269-2014
	20MnB4 1.5525
7	ISO 4954-2018
	20MnB4
8	Q/OHAB 113-2020
	20MnB4
9	ISO 4954-1-2024
	20MnB4

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