Stainless Steel Grades



Stainless steel grades have their designated applications, depending on their capacities and featured strength and properties.

Stainless Steel GradesStainless steel grades have their group distinctions including duplex, austenitic, martensitic, ferritic, PH, and special steel grades that are widely used in an extensive line of application. These stainless steel grades are known for their strength and properties that can withstand severe and corrosive environments, elevated temperatures and conditions. That is why stainless steels mostly earn the first choice and demand in customer-specific uses. The table below shows the distinct mechanical differences of stainless steel grades and how they are selected for various applications:

303 Austenitic Cold only / non-magnetic a good machinable austenitic with its additional sulphur content. less corrosion resistant than 303 and 316 nuts, bolts, gears, etc.
304 Austenitic Cold only / non-magnetic more suitable for complex forms than 301 kitchen appliances & sinks, truck trailers, architectural paneling, food processing equipment – milk brewing, wine making, beer brewing
316 Austenitic Cold only / non-magnetic most expensive austenitic, has better corrosion resistance with its additional molybdenum content pharmaceuticals, food preparation, architectural, marine applications, chemical containers, medical implants
316 / 316L Austenitic Cold only / non-magnetic extra low carbon grade of 316 marine applications, stainless steel watches, reactor pressure vessels, water reactors
316 / 316L Austenitic Cold only / non-magnetic extra low carbon grade of 316 marine applications, stainless steel watches, reactor pressure vessels, water reactors
321 Austenitic Cold only / non-magnetic has higher stress and creep rupture properties than 304 boiler and pressure vessels
347 Austenitic Cold only / non-magnetic has good creep strength and oxidation resistance, but low temperature toughness food processing, waste heat recovery, chemical processing, petroleum refining, pharmaceutical production
410 Martensitic Thermal hardening/ magnetic low cost, most widely used stainless martensitic steel, softer and more machinable than 416 or 420 nuts, screws, bolts, car parts, bushings, industrial products
420 Martensitic Thermal hardening/ magnetic high carbon version and harder than 410 cutlery and knife blades, surgical instruments, medium quality tools
430 Ferritic Thermal hardening/ magnetic decorative, has good formability but reduced corrosion and temperature resistance automotive trim
440C Ferritic / Martensitic Thermal hardening / magnetic has greater amount of carbon, has the toughest strength in 440 variants knifemaking
440F Ferritic / Martensitic Thermal hardening / agnetic free machining variant, has high carbon content areas requiring non-galling, non-seizing, and high hardness values
446 Ferritic / Martensitic Elevated Temperature most oxidation resistant boiler parts, burners, injector nozzles, thermocouple protectors, flame rods, glass bonding parts