30MnB4 - ISO 4954-1-2024

Grade	30MnB4
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

30MnB4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	B
Minimum Value	0.27	-	0.8	-	-	-	-	0.0008
Maximum Value	0.32	0.3	1.1	0.025	0.025	0.3	0.25	0.005

30MnB4 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
2≤d≤40	+AR or +PE	-	-
5＜d≤40	+AC or +AC+PE	≤570	≥63
2≤d≤5	+AR+C	-	-
5＜d≤40		-	-
2≤d≤5	+AR+C+AC	≤560	≥65
5＜d≤40		≤550	≥65
2≤d≤5	+AR+C+AC+LC	≤600	≥63
5＜d≤40		≤590	≥63
2≤d≤5	+AC+C	-	-
5＜d≤40		≤670	≥58

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
30MnB4	30MnB4	1.5526

30MnB4 Corresponding Standards(Same grade name, different standards)

1	EN 10263-4-2001
	30MnB4 1.5526
2	DIN EN 10263-4-2018
	30MnB4 1.5526
3	EN 10263-4-2017
	30MnB4 1.5526
4	ISO 4954-2018
	30MnB4
5	ISO 4954-1-2024
	30MnB4

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