ASTM A269 TP316L BA Tube Bright Annealing Tubing Stainless Steel Heat Exchanger Tube
ASTM A269 TP316L Stainless Steel Seamless Tube Bright Annealing Heat Exchanger Tube
Chemical Composition % of ASTM A269 TP316L Stainless Steel Heat Exchanger Tube bright Annealed Tubing
| Grade | UNS Designation | C | M | P | S | Si | Ch | Ni | Mo |
| TP316L | S31603 | 0.035 | 2 | 0.045 | 0.03 | 1 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 |
Mechanical properties of ASTM A269 TP316L Stainless Steel Heat Exchanger Tube bright Annealed Tubing
|
Grade
|
Tensile Str
(MPa) min |
Yield Str
0.2% Proof (MPa) min |
Elong
(% in 50mm) min |
Hardness
|
|
|
Rockwell B (HR B) max
|
Brinell (HB) max
|
||||
|
316L |
485
|
170
|
40
|
95
|
217
|
Physical Properties of ASTM A269 TP316L Stainless Steel Heat Exchanger Tube bright Annealed Tubing
|
Grade
|
Density
(kg/m3) |
Elastic Modulus
(GPa) |
Mean Co-eff of Thermal Expansion (m/m/0C)
|
Thermal Conductivity
(W/m.K) |
Specific Heat 0-1000C
(J/kg.K) |
Elec Resistivity
(nΩ.m) |
|||
|
0-1000C
|
0-3150C
|
0-5380C
|
At 1000C
|
At 5000C
|
|||||
|
316/L
|
8000 |
193
|
15.9
|
16.2
|
17.5
|
16.3
|
21.5
|
500 |
740 |
Bright Annealing (BA) Process Details:
-
Atmosphere: The furnace uses pure Hydrogen (H₂), Argon, or a vacuum. Hydrogen acts as a reducing agent.
-
Temperature: Annealing occurs around 1900°F to 2050°F (1040°C to 1120°C) .
-
Cooling: Rapid cooling (gas quenching) in the protected atmosphere to prevent carbide precipitation.
-
Surface Finish: The resulting BA finish typically has a surface roughness (Ra) of 0.2 µm to 0.6 µm (8 to 25 micro-inches). This is smoother than standard Pickled finishes.
Application
-
Heat exchangers, condensers, and boiler tubes.
-
Chemical processing, petrochemical, and refinery equipment.
-
Pharmaceutical and food-processing systems.
-
Power generation (e.g., superheaters, rebollers).
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