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X8CrNiS18 9 – Austenitic stainless steel

X8CrNiS18 9 is an austenitic stainless steel that offers the most machinability then any other austenitic grade due to it’s inclusion of Sulphur in the composition. ┬áThis does however lower the the corrosion resistance and toughness of this grade, though the toughness is still excellent as with other austenitic grades.

Alias

X8CrNiS18 9
1.4305
BS EN 10088-5

Chemistry

Element Min Max
C (Carbon) 0.1%
Cr (Chromium) 17% 19%
Cu (Copper) 1%
Mn (Manganese) 2%
N (Nitrogen) 0.1%
Ni (Manganese) 8% 10%
P (Phosphorus) 0.045%
S (Sulphur) 0.15% 0.35%
Si (Silicon) 1%

Mechanical Properties Min Max
Ultimate Tensile Strength (UTS) 500 MPa 750 MPa
0.2% Proof Stress 190 MPa
1.0% Proof Stress 225 MPa
Elongation 35%
Gauge Length A80mm
Hardness (Brinell) 230 HB

Applications

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Information is given for illustrative purposes only. Tachart accepts no responsibility for the accuracy of the data contained within or the use of the data by any other party.
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