What is the difference between 32750 and 32760?

S32750 and S32760 are both super duplex stainless steels, with a great deal of similarities and can often be substituted for the other, subject to customer specifications. The internal microstructure of these grades is a balance of austenitic and ferritic grains, which give a favourable combination of physical and mechanical properties. This mixed microstructure is associated with the term duplex. As they are based upon a composition built on 25% chromium content this defines them as a ‘super’ duplex stainless steel.

S32760 (DIN 1.4501, ASTM A182 F55) was developed in the 1980’s by Platt & Mather, Manchester UK and marketed as Zeron 100 for many years. The Zeron 100 trademark is now held by Rolled Alloys Inc. Langley Alloys stocks S32760 solid bars in sizes from 5/8” to 20” (15.87-508mm) diameter, plate up to 3” (76.2mm) thick, plus pipes in scheduled sizes, fittings and flanges.

S32750 (DIN 1.4410, ASTM A182 F53) was developed in the 1990’s By Sandvik and marketed as SAF2507. Langley Alloys stocks S32760 solid bars in sizes from 5/8” to 20” (15.87-508mm) diameter, plate up to 3” (76.2mm) thick, plus pipes in scheduled sizes, fittings and flanges.

S32750 and S32760 effectively have the same physical and mechanical properties within the limits of measurement. The main discernible difference is in the composition where S32760 contains deliberate controlled additions of copper and tungsten to influence corrosion resistance.

Langley Alloys stocks S32750 and S32760 solid bars in sizes from 5/8” to 20” (15.87-508mm) diameter, plate up to 3” (76.2mm) thick, plus pipes in scheduled sizes, fittings and flanges.

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