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Grade X6CrNiNb 18-10
European Standard Steel Grade 1.4550
Corresponding Standard EN 10217-7-2021
Part 7: Stainless steel tubes
Classification Austenitic Stainless Steel
X6CrNiNb 18-10 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Nb: 10C~1
Maximum Value 0.08 1 2 0.045 0.015 19 12
X6CrNiNb 18-10 Mechanical Properties
wall thickness
T
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Impact Energy Absorption
KV2
J
T≤60 Solution annealing (+AT) 510~740 ≥205 Rp1.0
≥240		 ≥35(l)
≥30(t)		 室温
≥100(l)；≥60(t)
-196°C
≥60(t)
• l=longitudinal；t=transverse
• Solution annealing temperature: 1020-1120°C, rapid cooling in water and air. Resistant to intergranular corrosion. Method A in EN ISO 3651-2-1998.
1 Approximate Comparison Table Austenitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
2 Approximate Comparison Table Austenitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb
(0Cr18Ni11Nb) 		S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
3 Approximate Comparison Table Austenitic Stainless Steel
China International Organization for Standardization European Standard
GB ISO EN
0Cr18Ni10Nb X6CrNiNb18-10 X6CrNiNb18-10
X6CrNiNb18-10 Corresponding Standards(Same grade name, different standards)
1 EN 10088-1-2005
X6CrNiNb 18-10 1.4550
2 EN 10296-2-2005
X6CrNiNb18-10 1.4550
3 EN 10253-4-2003
X6CrNiNb18-10 1.4550
4 EN 10250-4-1999
X6CrNiNb 18-10 1.4550
5 ISO TS 15510-2003
X6CrNiNb18-10
6 EN 10088-2-2005
X6CrNiNb18-10 1.4550
7 DIN 17440-1972
X6CrNiNb 18-10 X10CrNiNb 18-9 1.4550
8 EN 10088-3-2005
X6CrNiNb 18-10 1.4550
9 EN 10297(2)-2005
X6CrNiNb18-10 1.4550
10 ISO 9327(-5)-1999
X6CrNiNb18-10 (F50)
11 EN 10088-3-2014
X6CrNiNb 18-10 1.4550
12 ISO 15510-2014
X6CrNiNb18-10 4550-347-00-I
13 ISO 9328-7-2018
X6CrNiNb18-10
14 DIN EN 10088-3-2014
X6CrNiNb 18-10 1.4550
15 NF EN 10088-2-2005
X6CrNiNb18-10 1.4550
16 NF EN 10088-1-2005
X6CrNiNb18-10 1.4550
17 NF EN 10028-7-2008
X6CrNiNb18-10 1.4550
18 NF EN 10296-2-2005
X6CrNiNb18-10 1.4550
19 NF EN 10028-7-2000
X6CrNiNb18-10 1.4550
20 DIN EN 10296-2-2006
X6CrNiNb18-10 1.4550
21 EN 10272-2016
X6CrNiNb18-10 1.4550
22 EN 10217-7-2021
X6CrNiNb 18-10 1.4550
23 EN 10088-2-2024
X6CrNiNb18-10 1.4550
24 EN 10028-7-2016
X6CrNiNb18-10 1.4550

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