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Grade X6CrNiNb18-10
European Standard Steel Grade 1.4550
Corresponding Standard EN 10272-2016
Stainless steel bars for pressure purposes
Classification Austenitic Stainless Steel
X6CrNiNb18-10 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Nb：10 x C ~ 1.00
Maximum Value 0.08 1 2 0.045 0.015 19 12
X6CrNiNb18-10 Mechanical Properties
Diameter or thickness
d or b
mm		 Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
≤160 510~740 Rp0.2：≥205
Rp1.0：≥240		 l: ≥40 ≤230 (at 20℃)：l ≥100
(at -196℃)：≥40
160<d (b)≤400 510~740 Rp0.2：≥205
Rp1.0：≥240		 tr: ≥30 ≤230 (at 20℃)：tr ≥60
(at -196℃)：≥ 40
a) Axial： l；Tangential：tr.
* The maximum HBW-values may be raised by 100 units or the tensile strength value may be raised by 200 MPa and the minimum elongation value be lowered to 20 % for bars of ≤ 35 mm thickness having a final cold deformation.
1 Approximate Comparison Table
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
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
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 ISO 9327(-5)-1999
X6CrNiNb18-10 (F50)
10 EN 10088-3-2014
X6CrNiNb 18-10 1.4550
11 ISO 15510-2014
X6CrNiNb18-10 4550-347-00-I
12 ISO 9328-7-2018
X6CrNiNb18-10
13 DIN EN 10088-3-2014
X6CrNiNb 18-10 1.4550
14 NF EN 10088-2-2005
X6CrNiNb18-10 1.4550
15 NF EN 10088-1-2005
X6CrNiNb18-10 1.4550
16 NF EN 10028-7-2008
X6CrNiNb18-10 1.4550
17 NF EN 10296-2-2005
X6CrNiNb18-10 1.4550
18 NF EN 10028-7-2000
X6CrNiNb18-10 1.4550
19 DIN EN 10296-2-2006
X6CrNiNb18-10 1.4550
20 EN 10272-2016
X6CrNiNb18-10 1.4550

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