Stainless steel

STAINLESS STEELĀ S081

These are alloy steels that contain a minimum of 13 percentage (by weight) of chromium.

The most widely used in the seal and pump business are the 300 series of stainless steels because of their excellent corrosion resistance.

The material we refer to as grade 316 stainless steel is made from the following ingredients:

  • Chrome 18-20 %
  • Nickel 8-12 %
  • Carbon 0.08 %
  • Iron 64-70 %
  • Silicone 1%
  • Manganese 2%
  • Sulphur 0.030 %
  • Phosphorous 0.045 %

The designation 316 stainless steel is not used in all countries. The following list shows the designations used by some other nations for a similar product:

  • Germany 1.4571 or V4A
  • England EN58J
  • Sweden 2343
  • Hungary KO35
  • Czechoslovakia 17246

Stainless steel springs are never recommended for mechanical seals because of their problem with chloride stress corrosion.

The best material for the springs in stainless steel seals, is hastelloy “C”.

Category

Posted

  • On February 17, 2018