X7Ni9 - ISO 9328-4-2018

Grade	X7Ni9
Corresponding Standard	ISO 9328-4-2018 Nickel-Alloy Steels with Specified Low Temperature Properties
Classification	Alloy Steel

X7Ni9 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Ni	Mo	V	More
Minimum Value	-	-	0.3	-	-	8.5	-	-	Cr+Cu+Mo≤0.50
Maximum Value	0.1	0.35	0.8	0.015	0.005	10	0.1	0.01	Cr+Cu+Mo≤0.50

X7Ni9 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤30	Quenching and Tempering (+QT)	680~825	≥585	≥18
30＜t≤50	Quenching and Tempering (+QT)	680~825	≥575	≥18

1 Approximate Comparison Table Pressure-Bearing Flat Steel

International Organization for Standardization	European Standard
ISO	Numerical Grade
X7Ni9	1.5663

2 Approximate Comparison Table Pressure-Bearing Flat Steel

China	Japan	United States	International Organization for Standardization	European Standard
GB	JIS	ASTM	ISO	EN
06Ni9DR GB/T 713.4-2023	SL9N590 JIS G 3127-2021	9%Ni ASTM A533/A533M-17	X7Ni9 ISO 9328-4-2018	X8Ni9 X7Ni9 EN 10028-4-2017

X7Ni9 Corresponding Standards(Same grade name, different standards)

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