T-316 Pump Shaft Quality (PSQ)

Stainless Steel T-316 Pump Shaft Quality
  • This grade is annealed, centreless ground and polished.
Typical Analysis
C Mn P S Si Cr Ni Mo N
16/18 10/18 2/3
  • In simple terms, T-316 is a molybdenum bearing T-304; the addition of molybdenum greatly increases its corrosion resistance and its mechanical properties at elevated temperatures. This combination of corrosion resistance and high creep and tensile strength, plus good cold forming and drawing properties makesT-316 suitable for a very wide range of applications.
  • T-316L is a a low-carbon modification which minimizes carbide precipitation during welding and exposure to elevated temperatures in the 425˚C/815˚C range. lt can be used in the as-welded condition. T-316N has a higher nitrogen content than T-316 to increase strength with minimum effect on ductility and corrosion resistance.
  • T-316 is non-magnetic in the annealed condition and cannot be hardened by thermal treatment, but it does work harden. Machinability is approximately 42% - 70 surface feet per minute.
Typical Applications
  • Widely used in the pulp and paper, chemical, petro-chemical, Fertilizer and pharmaceutical industries. Heat exchangers, marine applications, aircraft industry, fittings, architectural components. Pump Shafts.
Corrosion and Heat Resistance
  • T-316 is more resistant to corrosive conditions than any of the more commonly used stainless grades (but see T-317). Very good resistance to the sulphur compounds used in pulp and paper processing. Good resistance to sulphuric, sulphurous and phosphoric acids and salts, also hydrogen sulphide; but poor resistance to hydrochloric and hydrofluoric acids. Excellent scale resistance at temperatures up to 900˚C in continuous service, and up to 850˚C for intermittent service.
Mechanical Properties
  • 75,000 psi minimum tensile strength
  • 30,000 psi minimum yield
  • 35% minimum elongation (in 2")
  • 50% minimum reduction of area (R/A)
  • Straightness Tolerance – 0.0015" per foot
  • Maximum out-of-round – 1/2 total diameter tol.
  • Diameter Tolerance:
      Size Tolerance
      .875"-.999" +0/- 0.0020"
      1.000"-1.4375" +0/- 0.0025"
      1.4376"-4.000" +0/- 0.0030"

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