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Grade X6CrNiNb 18-10
Germany W-Nr. 1.4550
Corresponding Standard DIN EN 10088-3-2014
Stainless steels – Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
Classification Austenitic Stainless Steel
Properties Corrosion Resistance
Density 7.9 g/cm3
X6CrNiNb 18-10 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni ⓓ More
Minimum Value - - - - - 17 9 Nb:10C~1.00
Maximum Value 0.08 1 2 0.045 0.015 19 12
① Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
X6CrNiNb 18-10 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
Bar, rod, wire, section, bright products; d≤160 +AT 510~740 ≥205 (long.)
≥40		 ≤230 (long.)
≥100
Bar, rod, wire, section, bright products; 160<d≤250 +AT 510~740 ≥205 (tr.)
≥30		 ≤230 (tr.)
≥60
+AT=solution annealed；+A=annealed；+QT = quenched and tempered；+P=precipitation hardening；+C=Cold worked，+Csuffix followed by a number represents the tensile strength grade, i.e., the minimum tensile strength value.
long.=longitudinal；tr.=transverse
d=diameter or thickness；Unit mm
New and Old Grade Replacement List
Corresponding Standard Grade
DIN 17440-1972
Grade
Germany W-Nr.
Other Name
DIN EN 10088-3-2014
Grade
Germany W-Nr.
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
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

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