The machinability is far superior to that of the ferritic 17% chromium steel, 1.4016 as a result of the controlled sulphur addition to this grade of steel. The addition of sulphur however reduces the resistance to corrosion, and as such 1.4016 is significantly more resistant to corrosion than 1.4104, despite their similar chromium contents. It should be noted that as a result of the sulphur addition, neither minimum impact properties, nor elevated temperature properties are specified.
Elongation A5 A5
10 % at 20 °C
Tensile strength Rm
650 - 850 MPa at 20 °C
Yield strength Rp0.2 Rp0.2
500 MPa at 20 °C
Coefficient of thermal expansion α
1.051E-5 1/K at 20 °C
15.5 - 17.5 %
0.2 - 0.6 %
Automotive industry, Decorative applications, Kitchen utensils, Electronic equipment
Low - Although 1.4104, contains 17 % chromium, the corrosion resistance of this steel is severely compromised by the addition of sulphur. This is particularly true when exposed to environments that promote pitting and crevice corrosion.
Very Good -The machinability of this grade of stainless steel is superior to other 12 and 17 % chromium steels as a result of the sulphur addition.
Quenched and tempered QT 650
This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).