X7CrNiNb18-10 1.4912 - EN 10222-5-2017

Grade	X7CrNiNb18-10
European Standard Steel Grade	1.4912
Corresponding Standard	EN 10222-5-2017 Steel Forgings for Pressure Purposes - Part 5: Martensitic, Austenitic and Austenitic-Ferritic Stainless Steels
Classification	Austenitic Stainless Steel
Properties	Corrosion Resistance

X7CrNiNb18-10 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S ^*	Cr	Ni	More
Minimum Value	0.04	-	-	-	-	17	9	Nb：10×C ~ 1.20
Maximum Value	0.1	1	2	0.045	0.015	19	12	Nb：10×C ~ 1.20

X7CrNiNb18-10 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
Cross-sectional thickness t≤450	+AT	510~710	≥205	long. ≥40；tr. ≥30	long.≥100；tr.≥60
Cross-sectional thickness t≤450	+AT				tr.≥40
Steel	+AT	≥410	≥171
Steel		≥390	≥162
Steel		≥370	≥153
Steel		≥360	≥147
Steel		≥350	≥139
Steel		≥345	≥133
Steel		≥340	≥129
Steel		≥330	≥124
Steel		≥300	≥121

1 Approximate Comparison Table Austenitic Stainless Steel

China		Japan	United States		International Organization for Standardization		France	European Standard
GB	ISC	JIS	ASTM/AISI	UNS	ISO	Numerical Grade	NF EN/NF	EN	Numerical Grade
07Cr18Ni11Nb (1Cr19Ni11Nb)	S34779	SUS347H	347H	S34709	X7CrNiNb18-10	4912-347-09-I	Z2CND17-11 Z2CND18-13 Z8CNNb18-10	X7CrNiNb18-10	1.4912

2 Approximate Comparison Table Seamless Steel Tubes and Pipes for High Pressure Boiler

X7CrNiNb18-10 Corresponding Standards(Same grade name, different standards)

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