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.
Typical Applications
- Chemical Process
- High Temperature
- Automotive
- Control Lines
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Product Range
Specifications:
ASTM A269 / ASTM A312
Dimensions:
All Pipes is manufactured and inspected/tested to the relevant standards including ASTM A269 / ASTM A312
Industries predominantly using this grade
-
Chemical Process
- Oil & Gas
- Automotive
Mechanical Properties
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) |
Chemical Composition
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) |
Physical Properties
Physical Properties (Room Temperature) |
Specific Heat (0-100°C) |
500 |
J.kg-1.°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 |