Grade 440B stainless steel is a high carbon martensitic stainless steel containing good strength, moderate corrosion resistance and ability to obtain and maintain wear resistance and excellent resistance.

Grade 440B is typically used in measuring instruments, gage blocks, cutlery, knives, dies, molds, ball bearings and valve components.


Carbon 0.75-0.95% Chromium 16.00-18.00%
Manganese 1.00% max Sulphur 0.030% max
Silicon 1.00% max Phosphorous 0.040% max
Molybdenum 0.75% max

BSS stock 440B in 1.4 , 1.5,  1.8,  2.3,  2.8,  3.3,  4.2 and 5.3mm thicknesses

Sheet sizes vary, and we can cut on site.

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Contact Details
  • Telephone 01709 820070
  • Fax 0114 244 5922
  • email bss@steelstrip.co.uk
  • Office Hours Monday to Thursday 09.00-17.00
  • Office Hours Friday 09.00-16.00
  • Fernite Works, Coleford Rd, Sheffield S9 5NJ



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