316 stainless steel
Class A4 USA Grade 316 F593
Grade A4 is also an Austenitic grade of 316 stainless steel, it has a higher corrosion resistance than A2 grade 316 stainless steel and this in many chemical environments.
Class A4 USA Grade 316 F593 is highly advised to be used where installations are undergoing extreme operating conditions, including contact with dilute sulphuric acid, and acetic acid over a wide range of temperature and concentration.
316L stainless steel is Resistance to atmospheric staining and pitting in industrial and urban areas, and also is suitable for marine conditions but not immersed in sea water.
The Class A4 USA Grade 316 F593 oxidation resistance is satisfactory for use up to 800ºC (1.472 °F).
Resistance to nitric acid and other oxidising chemicals is excellent.
Resistance to other mineral and organic acids is good within certain limits of temperature and concentration.
Generally unsuitable for solutions of hydrochloric acid and chlorides, particularly if evaporation at high temperatures occurs. Satisfactory oxidation resistance up to 800ºC (1.472 °F).
Class A4 USA Grade 316 F593 has a significant stress relaxation above 600ºC. (1112 °F)
Fasteners for boat deck fittings, chemical plant, swimming pools, dye vats, fertiliser, rayon and sewage treatment plants. Dairy equipment. Medical sterilising equipment.