316Ti/1.4571 ASTM A312 Seamless heat exchanger Stainless Steel Tubes
ASME SA213 / ASTM A213 316Ti UNS S31603, EN 10216 - 5 1.4571 Stainless Steel Similar to Grade 316L except that 316Ti has better high-temperature strength and mechanical strength. Used for equipment exposed to aggressive corrosive conditions and high-temperature applications, including automotive flexible connectors, welded bellows, chimney liners, and flexible ducting.
ASME SA213 316Ti Stainless Steel Tube Chemical Composition
Weight % | C | Si | Mn | P | S | Cr | Ni | Mo | Ti | Fe |
TP316Ti | 0.08 max | 0.75 max | 2.00 max | 0.045 max | 0.030 max | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | 5×(C+N)-0.70 | Rem |
EN 10216 - 5 1.4571 / X6CrNiMoTi17-12-2 | 0.08 max | 1.00 max | 2.00 max | 0.040 max | 0.015 max | 16.50-18.50 | 10.50-13.50 | 2.00-2.50 | 5×C-0.70 | Rem |
AISI 316 Ti | 0.08 max | 0.75 max | 2.00 max | 0.045 max | 0.030 max | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | 5× (C+N)-0.70 | Rem |
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
316H | 515 | 205 | 35% | 75 | 205 |
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.
Uns S31635 Alloy 316ti Stainless Steel Standard Stock Specifications
ASTM A213
BS EN 10216 part 5
Also individual customer specifications.
Uns S31635 Alloy 316ti Stainless Steel Available Tube Product form
Straight
Coiled
Seamless
Seam welded, cold redrawn and annealed
Uns S31635 Alloy 316ti Stainless Steel Typical Applications
Chemical processes
High temperature
Automotive
Uns S31635 Alloy 316ti Stainless Steel Industries predominantly using this Grade
Chemical processes
Automotive
Uns S31635 Alloy 316ti Stainless Steel 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) |
Uns S31635 Alloy 316ti Stainless Steel 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 |
μm/μm/°C |
Modulus Elasticity |
193 |
GPa |
Electrical Resistivity |
7.4 |
μohm/cm |
Density |
7.99 |
g/cm3 |
Uns S31635 Alloy 316ti Stainless Steel 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) |
Producing shop