Alloy 316Ti • UNS S31635 • WNR 1.4571

316Ti (UNS S31635) is a titanium stabilised version of 316 molybdenum-bearing austenitic stainless steel. The 316 alloys are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as 304. They also offer higher creep, stress-rupture and tensile strength at elevated temperature. High carbon Alloy 316 stainless steel can be susceptible to sensitisation, the formation of grain boundary chromium carbides at temperatures between approximately 900 and 1500°F (425 to 815°C) which can result in intergranular corrosion. Resistance to sensitisation is achieved in Alloy 316Ti with titanium additions to stabilise the structure against chromium carbide precipitation, which is the source of sensitisation. This stabilisation is achieved by an intermediate temperature heat treatment, during which the titanium reacts with carbon to form titanium carbides. This significantly reduces susceptibility to sensitisation in service by limiting the formation of chromium carbides. Thus, the alloy can be used for extended periods at elevated temperatures without compromising its corrosion resistance. 316Ti has equvilent corrosion resistance to sensitisation as the low carbon version 316L.

Available tube product forms

Typical Applications

Typical manufacturing specifications

  • ASTM A213
  • BS EN 10216 part 5
  • Also individual customer specifications.

Industries predominantly using this grade            

Technical Data

Mechanical Properties

Temper Annealed
Tensile Rm 75 ksi (min)
Tensile Rm 515 MPa (min)
R.p. 0.2% Yield 30 ksi (min)
R.p. 0.2% Yield 205 MPa (min)
Elongation (2” or 4D gl) 35 % (min)

Physical Properties (Room Temperature)

Specific Heat (0-100°C) 500°K-1
Thermal Conductivity 14.6 W.m -1.°K-1
Thermal Expansion 16.5 mm/m/°C
Modulus Elasticity 193 GPa
Electrical Resistivity 7.4 μohm/cm
Density 7.99 g/cm3

Chemical Composition (% by weight)

Element Min Max
C - 0.08
Si - 0.75
Mn - 2
P - 0.45
S - 0.03
Cr 16 18
Mo 2 3
N - 0.1
Fe Balance
Ni 10 14
Ti 5x%(C+N)
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