ASTM B338 covers 28 grades of seamless and welded titanium and titanium alloy tubes for surface condensers, evaporators, and heat exchangers. Here is an overview of ASTM B338 titanium alloy tubes.
Chemical Composition of ASTM B338 Titanium Tubes
|
Element
|
Chemical Composition %
|
|
Grade 1
|
Grade 2
|
Grade 3
|
Grade 5
|
Grade 7
|
Grade 9
|
Grade 11
|
Grade 12
|
Grade 23
|
|
Nitrogen, max
|
0.03
|
0.03
|
0.05
|
0.05
|
0.03
|
0.03
|
0.03
|
0.03
|
0.03
|
|
Carbon, max
|
0.08
|
0.08
|
0.08
|
0.08
|
0.08
|
0.08
|
0.08
|
0.08
|
0.08
|
|
Hydrogen, max
|
0.015
|
0.015
|
0.015
|
0.015
|
0.015
|
0.015
|
0.015
|
0.015
|
0.0125
|
|
Iron, max
|
0.20
|
0.30
|
0.30
|
0.40
|
0.30
|
0.25
|
0.20
|
0.30
|
0.25
|
|
Oxygen, max
|
0.18
|
0.25
|
0.35
|
0.20
|
0.25
|
0.15
|
0.18
|
0.25
|
0.13
|
|
Aluminum
|
…
|
…
|
…
|
5.5-6.75
|
…
|
2.5-3.5
|
…
|
…
|
5.5-6.5
|
|
Vanadium
|
…
|
…
|
…
|
3.5-4.5
|
…
|
2.0-3.0
|
…
|
…
|
3.5-4.5
|
|
Tin
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Ruthenium
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Palladium
|
…
|
…
|
…
|
…
|
0.12-0.25
|
…
|
0.12-0.25
|
…
|
…
|
|
Molybdenum
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
0.2-0.4
|
…
|
|
Chromium
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Nickel
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
0.6-0.9
|
…
|
|
Niobium
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Ziconium
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Silicon
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
…
|
|
Residuals, max each
|
0.1
|
0.1
|
0.1
|
0.1
|
0.1
|
0.1
|
0.1
|
0.1
|
0.1
|
|
Residuals, max total
|
0.4
|
0.4
|
0.4
|
0.4
|
0.4
|
0.4
|
0.4
|
0.4
|
0.4
|
|
Titanium
|
balance
|
balance
|
balance
|
balance
|
balance
|
balance
|
balance
|
balance
|
balance
|
Tensile Strength of ASTM B338 Titanium Tubes
|
Grade
|
Tensile Strength, min
|
Yield Strength (0.2% Offset)
|
Elongation 2 in. or 50 mm
|
|
|
min
|
max
|
|
Ksi
|
(Mpa)
|
Ksi
|
(Mpa)
|
Ksi
|
(Mpa)
|
gage length min %
|
|
|
Grade 1
|
35
|
(240)
|
25
|
(170)
|
45
|
(310)
|
24
|
|
Grade 2
|
50
|
(345)
|
40
|
(275)
|
65
|
(450)
|
20
|
|
Grade 3
|
65
|
(450)
|
55
|
(380)
|
80
|
(550)
|
18
|
|
Grade 5
|
130
|
(895)
|
120
|
(828)
|
…
|
…
|
10
|
|
Grade 7
|
50
|
(345)
|
40
|
(275)
|
65
|
(450)
|
20
|
|
Grade 9
|
90
|
(620)
|
70
|
(483)
|
45
|
…
|
15
|
|
Grade 11
|
35
|
(240)
|
25
|
(170)
|
…
|
(310)
|
24
|
|
Grade 12
|
70
|
(483)
|
50
|
(345)
|
…
|
…
|
18
|
|
Grade 23
|
120
|
(828)
|
110
|
(759)
|
…
|
…
|
10
|
ASTM B338 Titanium Alloy Tubes Applications
- Chlorination systems
- Flue gas scrubbers
- Outlet ducting and stack liners for power plants, pulp and paper bleach plants, and sulfur dioxide scrubbers
- Weld overlay of less corrosion-resistant metals
- Acid production and pickling systems
- Pharmaceutical industries (to avoid contamination from corrosion-related failures)
- Cellophane manufacturing
- Pesticide production
- Incineration scrubber systems
- Chemical process industry (flue gas scrubbers, chlorination systems, sulfur dioxide scrubbers, pulp and paper bleach plants, pickling systems, nuclear fuel reprocessing)
- Wastewater processing
- Pollution control (stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans, and fan housings)
- Flue gas desulfurization systems
- Chemical processing (heat exchangers, reaction vessels, evaporators, and transfer piping)
- Sour gas wells
- Pulp and paper production
- Waste treatment
- Pharmaceutical and food processing equipment
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