PT550ML1 - ISO 9328-5-2018

Grade	PT550ML1
Corresponding Standard	ISO 9328-5-2018 Steel Flat Products for Pressure Purposes - Weldable Fine Grain Steels, Thermomechanically Rolled
Classification	Alloy Steel

PT550ML1 Chemical Element Composition Content (%)

Component	C ^②	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	B	Al ^①
Minimum Value	-	-	0.7	-	-	-	-	-	-	-	-	-	-	0.02
Maximum Value	0.18	0.55	1.6	0.015	0.01	0.3	0.5	0.4	0.2	0.05	0.1	0.05	0.001	-

PT550ML1 Mechanical Properties

	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
6 ≤ t ≤ 65	550~690	≥415	≥16
65 ≤ t ≤ 100	520~660	≥380	≥16

Approximate Comparison Table Pressure-Bearing Flat Steel

Japan	United States	International Organization for Standardization
JIS	ASTM	ISO
SPV315 SLA365 SPV410	A841-2	PT490M PT490ML1 PT490ML3 PT550M PT550ML1

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