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X6CrNiNb18 10 – Austenitic stainless steel

Material X6CrNiNb18 10 is an austenitic stainless steel that offers an excellent corrosion resistance to acid, alkali and salt solutions as well as offering both good welding and antioxidant properties.


X6CrNiNb18 10
UNS S34700
Alloy 347


Element Min Max
C (Carbon) 0.08%
Cr (Chromium) 17% 19%
Mn (Manganese) 2%
N (Nitrogen) 0.1%
Ni (Nickel) 9% 12%
P (Phosphorus) 0.045%
S (Sulphur) 0.03%
Si (Silicon) 1%
Mechanical Properties Min Max
Ultimate Tensile Strength (UTS) 520 MPa 720 MPa
0.2% Proof Stress 220 MPa
Elongation 40%
Gauge length A80mm


Used commonly within the Oil and Gas, Petrochemical industries.
Typically used within applications such as heat exchangers, Piping, Boiler tubes, etc.

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