28B2 - ISO 4954-1-2024

Grade	28B2
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

28B2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	B
Minimum Value	0.25	-	0.6	-	-	-	-	0.0008
Maximum Value	0.3	0.3	0.9	0.025	0.025	0.3	0.25	0.005

28B2 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
5＜d≤25	+AR or +PE	≤630	≥60
5＜d≤25	+AC or +AC+PE	≤520	≥64
5＜d≤10	+AR+C	≤720	≥55
10＜d≤25		≤710	≥55
2≤d≤5	+AR+C+AC	≤510	≥66
5＜d≤25		≤500	≥66
2≤d≤5	+AR+C+AC+LC	≤550	≥64
5＜d≤25		≤540	≥64
5＜d≤10	+AC+C	≤610	≥59
10＜d≤25		≤600	≥59

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

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
28B2	28B2	1.5510

28B2 Corresponding Standards(Same grade name, different standards)

1	EN 10263-4-2001
	28B2 1.5510
2	Q/BQB 517-2018
	28B2
3	DIN EN 10263-4-2018
	28B2 1.5510
4	EN 10263-4-2017
	28B2 1.5510
5	ISO 4954-2018
	28B2
6	ISO 4954-1-2024
	28B2
7	DIN 1654-4-1989
	28B2 1.5510

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