ASTM B338 Grade 2 Titanium Tube UNS R50400 Seamless Tubing

 

ASTM B338 Grade 2 Titanium Tube is manufactured from commercially pure titanium Grade 2, designated UNS R50400. It offers an excellent combination of corrosion resistance, moderate strength, low density and good ductility for demanding industrial applications.
Grade 2 titanium is particularly suitable for environments containing seawater, chlorides and many corrosive chemical media. When manufactured to ASTM B338 requirements, the tubing can be used in heat exchangers, condensers, desalination systems, chemical processing equipment and marine cooling systems.
We supply ASTM B338 Grade 2 Titanium Tubes in a range of outside diameters, wall thicknesses and lengths. Custom sizes and cut-to-length services are available according to drawings, specifications and project requirements.

 

ASTM B338 Grade 2 Titanium Tube is manufactured from commercially pure, unalloyed titanium Grade 2 (UNS R50400). The tubing is available in different outside diameters, wall thicknesses and lengths for heat exchangers, condensers, evaporators and other corrosive-service applications.

Item	Specification
Product Name	ASTM B338 Grade 2 Titanium Tube
Material	Commercially Pure Titanium
Titanium Grade	Grade 2
UNS	R50400
Standard	ASTM B338 / ASME SB338
Tube Type	Seamless
Outside Diameter	3–100 mm
Wall Thickness	0.5–10 mm
Length	Up to 6,000 mm / Custom
Heat Treatment	Stress Relieved / As Specified
Surface	Pickled / Bright / Polished
Manufacturing	Cold Drawn / Cold Reduced / Welded and Cold Worked
End Condition	Plain End / Cut to Length
Inspection	Dimensional, Mechanical, Chemical and Applicable NDT
Certification	Mill Test Certificate (MTC) Available

 

Outside Diameter (OD)	Typical Wall Thickness (WT)	Available Length
6 mm	0.5–1.0 mm	Up to 6 m
8 mm	0.5–1.5 mm	Up to 6 m
10 mm	0.5–2.0 mm	Up to 6 m
12 mm	0.5–2.0 mm	Up to 6 m
16 mm	0.8–2.5 mm	Up to 6 m
20 mm	1.0–3.0 mm	Up to 6 m
25 mm	1.0–3.0 mm	Up to 6 m
32 mm	1.0–4.0 mm	Up to 6 m
38 mm	1.5–4.0 mm	Up to 6 m
50 mm	1.5–5.0 mm	Up to 6 m
63 mm	2.0–6.0 mm	Up to 6 m
76 mm	2.0–8.0 mm	Up to 6 m
89 mm	2.5–8.0 mm	Up to 6 m
100 mm	3.0–10.0 mm	Up to 6 m

 

Grade 2 is a commercially pure titanium grade. Its chemical composition is controlled primarily through titanium purity and maximum limits for elements such as oxygen, nitrogen, carbon, hydrogen and iron.

Element	Symbol	Maximum Content (wt.%)
Titanium	Ti	Balance
Iron	Fe	0.30
Oxygen	O	0.25
Carbon	C	0.10
Nitrogen	N	0.03
Hydrogen	H	0.015

 

Property	Typical Value
Material	Commercially Pure Titanium
Grade	Grade 2
UNS	R50400
Density	4.51 g/cm³
Melting Point	Approx. 1660°C
Elastic Modulus	Approx. 105 GPa
Thermal Conductivity	Approx. 16.4 W/m·K
Coefficient of Thermal Expansion	Approx. 8.6 × 10⁻⁶ /K
Electrical Resistivity	Approx. 0.42 μΩ·m
Specific Heat Capacity	Approx. 520 J/kg·K
Crystal Structure	Hexagonal Close-Packed (HCP)

 

ASTM B338 Grade 2 Titanium offers good tensile strength, moderate yield strength and excellent ductility, making it suitable for heat exchangers, condensers and corrosive-service tubing.

Mechanical Property	ASTM B338 Grade 2 Titanium
Tensile Strength, min.	345 MPa
Yield Strength, min. (0.2% Offset)	275 MPa
Elongation, min.	20%
Material Condition	Stress Relieved / As Specified
Grade	Titanium Grade 2
UNS	R50400

 

ASTM B338 is the ASTM specification covering seamless and welded titanium and titanium alloy tubes intended for condensers, heat exchangers and similar applications.

Grade 2 under ASTM B338 is commercially pure titanium and is identified by UNS R50400.

The standard addresses requirements related to:

Chemical composition

Mechanical properties

Manufacturing

Heat treatment

Dimensions

Workmanship

Testing

Inspection

For projects using ASME specifications, ASME SB338 may be specified where applicable.
 

 

Property	Grade 1 Titanium Tube	Grade 2 Titanium Tube
UNS	R50250	R50400
Material Type	Commercially Pure Titanium	Commercially Pure Titanium
Tensile Strength, min.	240 MPa	345 MPa
Yield Strength, min.	170 MPa	275 MPa
Elongation, min.	24%	20%
Corrosion Resistance	Excellent	Excellent
Strength	Lower	Higher
Ductility	Higher	Very Good
Typical Applications	Heat exchangers, chemical equipment, marine equipment	Heat exchangers, condensers, chemical processing, power equipment

 

Proper packaging helps protect titanium tubing from contamination, deformation and surface damage during storage and international transportation.

Typical export packaging includes:

Plastic caps on tube ends

Individual protective wrapping

Bundled tubes

Waterproof packaging

Steel straps

Wooden cases where required

Product identification labels

Heat number and material grade marking

Packaging can be customized according to tube dimensions, transportation method and customer requirements.
 

Corrosion Resistance: ASTM B338 Grade 2 Titanium Tube performs exceptionally well in seawater, chloride ion environments, and oxidizing media, making it suitable for corrosive environments such as marine engineering and chemical equipment.
Mechanical Properties: High specific strength means lighter weight at the same strength, while excellent ductility supports cold working operations such as bending and flaring, expanding its application flexibility.
Processing Adaptability: Deep hole machining technology supports the production of tubing with a large aspect ratio. Rolling ensures wall uniformity, making it suitable for high-pressure fluid transmission. Applications
Chemical Industry: Used in the manufacture of corrosion-resistant equipment such as reactors and heat exchangers.
Aerospace: Used as lightweight structural components to reduce aircraft weight.
Medical Industry: Due to its excellent biocompatibility, it can be used in implants or surgical instruments.
Electronics Industry: High-purity titanium tubes are suitable for gas delivery systems in semiconductor manufacturing.

 

Processing Temperature: During hot working, the temperature must be controlled between 850-950°C to avoid overheating and grain coarsening.
Surface Protection: Passivation treatment is required after cutting to prevent the oxide layer from affecting corrosion resistance.
Material Compatibility: When used with grades such as TC4 and TC6, the risk of electrochemical corrosion should be assessed. We now offer ASTM B338 Grade 2 Titanium Tube, made from an α+β titanium alloy, which offers strong corrosion resistance and high specific strength. Custom processing and surface finishing are available. Please contact us for more information and to provide you with the best solution.

 

Aerospace: Hydraulic and pneumatic system tubing, engine components, airframe structures, and landing gear parts.

Marine & Offshore: Heat exchanger tubes for desalination plants, shipboard piping systems, offshore platform components.

Chemical Processing: Heat exchangers, condensers, reactor vessels, and process piping for the chlor-alkali industry.

Medical & Pharmaceutical: Surgical implants (bone plates, screws), wheelchair frames, surgical instruments, pharmaceutical processing equipment.

Automotive & Racing: High-performance exhaust systems, roll cages, lightweight structural components.

Power Generation: Condenser tubes in geothermal and fossil fuel power plants, cooling tubes in non-critical nuclear applications.
 

Jude Steel supplies titanium, stainless steel and other specialty metal products for industrial applications and international customers.

ASTM-Specified Materials

We supply Grade 2 titanium tubing according to the specified ASTM B338 requirements and provide material documentation when required.

Flexible Dimensions

Different outside diameters, wall thicknesses and lengths can be supplied according to project specifications.

Custom Cut-to-Length Service

Standard lengths and customized cut lengths are available for fabrication and installation requirements.

Quality Inspection

Chemical composition, mechanical properties, dimensions and surface condition can be inspected according to the agreed specification.
 

Q: What is the UNS number for Grade 2 titanium?

A: The UNS designation for Titanium Grade 2 is UNS R50400.

Q: Is Grade 2 titanium commercially pure titanium?

A: Yes. Grade 2 is a commercially pure titanium grade. It should not be described as an alpha-beta titanium alloy. Grade 5 Ti-6Al-4V, by comparison, is an alpha-beta titanium alloy.

Q: What is the difference between Grade 1 and Grade 2 titanium?

A: Both are commercially pure titanium grades. Grade 2 generally provides higher strength than Grade 1 while retaining excellent corrosion resistance. Grade 1 is often selected when maximum formability and lower strength are acceptable.

Q:What is the difference between Grade 2 and Grade 5 titanium?

A: Grade 2 is commercially pure titanium, while Grade 5 is Ti-6Al-4V. Grade 5 provides substantially higher strength, whereas Grade 2 offers excellent corrosion resistance, good ductility and suitability for heat-transfer applications.

Q: Is ASTM B338 Grade 2 titanium tube suitable for heat exchangers?

A: Yes. ASTM B338 specifically covers titanium and titanium alloy tubes for condenser and heat exchanger applications. Grade 2 is widely selected for corrosive heat-transfer environments.

Q: What sizes of Grade 2 titanium tube are available?

A: Typical sizes can range from approximately 3 mm to 100 mm outside diameter with wall thicknesses from approximately 0.5 mm to 10 mm. Custom sizes and lengths can be supplied according to production capability and project requirements.

Q: Can Grade 2 titanium tubes be cut to length?

A: Yes. Cut-to-length service can be provided according to customer-specified dimensions or drawings.

Q: What surface finishes are available?

A: Depending on production requirements, Grade 2 titanium tubes can be supplied with pickled, bright or polished surfaces.

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