50 grades of stainless steel

The BSSA has selected 50 Grades of Stainless Steel as its theme for 2014. Each week throughout the year, we will showcase one grade and illustrate the variety of corrosion resistant, mechanical and physical properties which determine its suitability for a wide range of applications.



416 1.4005 S41600

416 is the most common “free-machining” martensitic grade using sulphur to produce sulphides allowing easier chip-breaking during machining.

Approximate Composition - 12% Cr, 0.10% C, 0.25/0.35% S (Exact composition ranges vary between EN and ASTM standards).

This grade combines the following characteristics:

  • Basic corrosion resistance lower than grade 410 due to sulphur
  • Moderate strength and toughness
  • Excellent machinability index approximately 90 compared to 100 for free cutting mild steel

416 is the preferred free machining grade where higher strength than 303 is required. It is essentially grade 410 (1.4006) with sulphur for free machining. It is ideal for high throughput, intricate components.

Applications include:

Shafts, axles, gears, valves, fasteners, golf club heads, sensors, precision machined components, gun barrels, washing machine parts, dowel pins, clamps, collars.

Find out more about the 50 Grades of Stainless Steel campaign

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British Stainless Steel Association (BSSA): registered in England and Wales as a private company limited by guarantee; registration no. 07547349