E550 E - JIS G 3128-1999(R2004)

Grade	E550 E
Corresponding Standard	JIS G 3128-1999(R2004) High Yield Strength Steel Plates for Welded Structure
Classification	Alloy Steel
Properties	Good Weldability

E550 E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^③	Ni ^③	Cu ^③	Mo ^③	N ^③	Ti ^①③	V ^①②③	Nb ^①③	Zr ^①③	B ^③	Al ^①
Minimum Value	-	0.1	-	-	-	-	-	-	-	-	-	-	-	-	-	0.02
Maximum Value	0.2	0.8	1.7	0.03	0.03	2	2	1.5	1	0.02	0.2	0.1	0.06	0.15	0.005	-

① At least one of these grain-refining elements shall be present or aluminium shall be added.
② When there is no stress-relieving treatment, a maximum content of 0.20 % (m/m) is permitted.
③ Depending on thickness and manufacturing conditions, the manufacturer may find it necessary to add one or several alloying elements within the limits defined in table. The manufacturer shall state the type of steel supplied and also the range of alloying elements present in this steel.

E550 E Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤50	650~830	ReH(Rp0.2) ≥550	≥16	-50°C: ≥27*
50＜t≤70	650~830	ReH(Rp0.2) ≥530	≥16	-50°C: ≥27*

E550E Corresponding Standards(Same grade name, different standards)

1	ISO 4950-3-1995
	E 550 E
2	JIS G 3128-1999(R2004)
	E550 E

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