UNS S32615

UNS S32615 is a high silicon containing austenitic stainless steel.  It was developed by Sandvik exclusively for use in concentrated sulphuric acid.  Edmeston AB is a wholly owned subsidiary of Sandvik and introduced SX to the industry in 1985.  Edmeston continue to market SX world wide through its licensees, agents and representatives.

Stainless Steel Flanges

Stainless Steel Flanges

Edmeston has developed a complete standard for pipes, flanges and fittings made of SX.  The standard is based on ASME B 31.3 and covers the size range from DN 25 (1”) up to DN 600 (24”).  Flanges are available in ISO, PN 10 and ANSI B16.5 (150 lb) standards.  Larger dimensions and other custom parts are manufactured according to individual customer needs.


Yield Strength (0.2% offset) minimum
20°C 220 N/mm²
50°C 196 N/mm²
100°C 175 N/mm²
150°C 160 N/mm²
200°C 148 N/mm²
Yield Strength (0.1% offset) minimum
20°C 250 N/mm²
Tensile Strength 20°C 550-800 N/mm²
Elongation A5 20°C 30%
Hardness, Vickers 160 nom

Physical Properties

Density 7.8 g/cm³
Thermal Conductivity
20°C 11 W/m °C
100°C 13 W/m °C
200°C 14 W/m °C
Specific Heat Capacity
50-100°C 500 J/kg °C
Thermal Expansion
20-100°C 15.0 x 10-6 per °C
20-200°C 15.5 x 10-6 per °C
20-300°C 16.0 x 10-6 per °C
Modulus of Elasticity
20°C 200,000 N/mm²
400°C 170,000 N/mm²


The welding properties are good and the welds produced are smooth and show a corrosion resistance comparable to that of the base metal.

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