Commonly called 25/20. Good oxidation resistance and resistant to sulphur and reducing atmospheres. High temperature sheathing. Carbon dioxide to 900 ° C. Continuous operation in air up to 1150 ° C, without temperature variation. Not recommended for use continuously between 550 ° C and 850 ° C.
Basic Composition: Cr 25%, Ni 20%, Mn 2%, Si 2%, C 0.02%, Bal Fe.
Temperature Limits: 1100 ° C
International Standards: BS 970 Grade 310 S31, W No 1.4841
Density: 7.9 g/cm³
Melting Range: Approx 1400 ° C
Specific Heat: 500 J/Kg ° C
Coefficient of Expansion: 16.5 x10-6 / ° C
Thermal Conductivity: 14.7 W/m ° C
Peak Sensors Colour Code: Silver