ASTM B338 Grade 2 Titanium Tube

Direct Manufacturer of Titanium Tubes in China
18+ Years Titanium & Heat Exchanger Tube Production Experience
ASTM B338 / ASME SB338 Fully Compliant
Seamless & Welded Tubes Available
U-Bend & Coil Tube Processing Capability
100% Eddy Current Testing (ECT)
Hydrostatic / Ultrasonic Testing Available
EN10204 3.1 / 3.2 Mill Test Certificate
SGS / BV / TUV Third-Party Inspection Support
Fast Delivery: 7–15 Days for Standard Sizes
OEM / Custom Manufacturing Available

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Product Introduction

What Is ASTM B338 Grade 2 Titanium Tube?

ASTM B338 Grade 2 Titanium Tube is a commercially pure titanium tube manufactured for condensers, heat exchangers, and other corrosion-resistant service applications. Also referred to as ASTM B338 Gr2 Titanium Tube, Grade 2 Titanium Heat Exchanger Tube, or UNS R50400 Titanium Tube, it is one of the most widely specified titanium tubing materials in chemical processing, seawater cooling, desalination, offshore engineering, and power generation industries.

ASTM B338 Grade 2 Titanium Tube Specifications

Item	Specification
Product Name	ASTM B338 Grade 2 Titanium Tube
Material Grade	Grade 2 Titanium (Gr2)
UNS Number	UNS R50400
Standard	ASTM B338 / ASME SB338
Product Forms	Straight Tube, U-Bend Tube, Coil Tube, Tube Bundle
Manufacturing Method	Seamless / Welded
Outside Diameter	3.18–114.3 mm (Custom Available)
Wall Thickness	0.3–5.0 mm
Length	Random, Fixed or Customized
Surface Finish	Pickled, Bright Annealed, Polished
Heat Treatment	Annealed
End Finish	Plain End, Beveled End
Inspection	Eddy Current, Hydrostatic, Ultrasonic, PMI
Certificate	EN 10204 3.1 / MTC
Typical Applications	Heat Exchangers, Condensers, Desalination, Marine, Chemical Processing, Power Plants

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Available Forms of ASTM B338 Gr2 Tube

Straight Tube

U-Bend Tube

Coiled Tube

Serpentine Tube

Tube Bundle

Finned Tube

Tube Form	Description	Typical Application
Straight Tube	Standard seamless or welded tubes supplied in fixed lengths	Shell & Tube Heat Exchangers
U-Bend Tube	Precision cold-bent tubes with controlled bend radius	U-Tube Heat Exchangers
Coiled Tube	Continuous coils for compact heat transfer systems	Heat Recovery & Marine Cooling
Serpentine Tube	Multi-bend tubes for HVAC and refrigeration equipment	Air Conditioning & Chillers
Tube Bundle	Pre-assembled tube bundles ready for installation	Condensers & Process Heat Exchangers
Finned Tube	Tubes with external fins for enhanced air-side heat transfer	Air Coolers & Waste Heat Recovery

Available Sizes & Dimensions of Grade 2 Titanium Heat Exchanger Tube

In industrial applications, most ASTM B338 Gr2 titanium heat exchanger tubes are supplied in straight lengths, but they can also be further processed into U-bend tubes, coil tubes, or custom fabricated tube bundles according to engineering drawings.

Item	Specification
Outer Diameter (OD)	6.35 – 219 mm
Wall Thickness	0.5 – 10 mm
Length	1 – 12 m / Custom
Type	Seamless / Welded
Form	Straight / U-Bend / Coil
Surface	Pickled / Polished
Condition	Annealed
End Finish	Plain / Beveled
Standard	ASTM B338 / ASME SB338

ASTM B338 Gr2 Titanium Condenser Tube Tolerance Table

Item	Tolerance	Engineering Purpose
Outside Diameter (OD ≤ 25 mm)	±0.08 mm	Ensures proper tube insertion into tube sheet and expansion fit
Outside Diameter (OD > 25 mm)	±0.10 mm or ±0.4% (whichever is greater)	Maintains assembly accuracy for large diameter tubes
Wall Thickness (WT)	±10%	Ensures minimum pressure rating and corrosion allowance
Cut Length (Straight Tube)	±3 mm to ±5 mm	Facilitates accurate installation in heat exchanger bundles
Straightness	≤ 1.5 mm per meter	Prevents misalignment during tube insertion and assembly
Ovality (Out-of-Roundness)	≤ 2% of OD	Ensures uniform tube expansion and sealing performance

What We Can Customize

We support full customization for ASTM B338 Grade 2 titanium tubes, including:

Outside Diameter (OD): non-standard sizes based on design requirements

Wall Thickness (WT): optimized according to pressure and corrosion conditions

Length: fixed, random, or ultra-long tubes for large condensers

Tube Type: seamless or welded depending on cost and performance needs

U-bend tubes: manufactured strictly according to tube sheet drawings

Coil tubes: customized coil diameter and pitch for compact systems

Surface finish: pickled, polished, or special cleaned surfaces

Send Your Drawing for Custom Titanium Tube Quote

Grade 2 Titanium vs Other Titanium Grades

Grade 2 titanium offers an excellent combination of corrosion resistance, moderate strength, outstanding weldability, and competitive cost, making it the preferred choice for seawater cooling systems, chemical processing equipment, desalination plants, and power generation facilities. However, applications involving stronger reducing acids, higher operating temperatures, or higher mechanical loads may require other titanium grades.

Grade	Type	Strength	Corrosion Resistance	Weldability	Typical Applications
Grade 1	Commercially Pure Titanium	Low	Excellent	Excellent	Chemical equipment, highly formable tubing
Grade 2	Commercially Pure Titanium	Medium	Excellent	Excellent	Heat exchangers, condensers, seawater cooling, desalination
Grade 7	Ti-Pd Alloy	Medium	Outstanding	Excellent	Acid handling, flue gas desulfurization, chlorate production
Grade 12	Ti-Ni-Mo Alloy	High	Excellent	Very Good	Pressure vessels, chemical reactors, high-temperature heat exchangers
Grade 5 (Ti-6Al-4V)	Alpha-Beta Alloy	Very High	Good	Good	Aerospace, medical, structural components

When Should You Choose Grade 2 Titanium?

Choose ASTM B338 Grade 2 Titanium Tube when your project requires long-term corrosion resistance, reliable heat transfer performance, and cost-effective operation. It is the industry standard for shell-and-tube heat exchangers, condensers, marine cooling systems, and seawater desalination equipment because it combines excellent resistance to chlorides with easy fabrication and welding.

When Should You Consider Other Titanium Grades?

Grade 1 Titanium

Choose Grade 1 when maximum ductility and formability are more important than mechanical strength. It is often selected for complex fabricated components or thin-wall tubing.

Grade 7 Titanium

Grade 7 contains palladium, providing significantly improved resistance to reducing acids and highly aggressive chemical media. It is commonly specified for hydrochloric acid, sulfuric acid, and wet chlorine environments where commercially pure titanium may not provide sufficient durability.

Grade 12 Titanium

Grade 12 contains nickel and molybdenum, offering higher strength and improved resistance to crevice corrosion at elevated temperatures. It is suitable for pressure vessels, chemical reactors, and demanding industrial process systems.

Grade 5 Titanium

Grade 5 is a high-strength titanium alloy primarily used for structural applications rather than heat exchanger tubing. Although it provides superior mechanical properties, it is more difficult to form and weld and is generally unnecessary for corrosion-resistant heat transfer equipment.

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Seamless ASTM B338 Tube Chemical Composition

ASTM B338 Grade 2 Titanium (UNS R50400) is a commercially pure titanium grade with controlled interstitial elements to achieve an optimal balance between corrosion resistance, mechanical strength, and weldability. Compared with alloyed titanium grades, Grade 2 relies primarily on purity and oxygen content to deliver consistent performance in heat exchanger and condenser applications.

Element	Content (%)
Titanium (Ti)	Balance
Oxygen (O)	≤ 0.25
Iron (Fe)	≤ 0.30
Carbon (C)	≤ 0.08
Nitrogen (N)	≤ 0.03
Hydrogen (H)	≤ 0.015
Other Elements	Each ≤ 0.10, Total ≤ 0.40

Mechanical Properties of Titanium Gr2 Tube

Unlike high-strength titanium alloys, Grade 2 titanium tubing is designed to provide reliable mechanical performance while maintaining superior corrosion resistance and excellent weldability. This combination makes it ideal for fabrication into straight tubes, U-bend tubes, coil tubes, and complex heat exchanger assemblies.

Property	Value
Tensile Strength (min)	≥ 345 MPa
Yield Strength (0.2% offset, min)	≥ 275 MPa
Elongation (min)	≥ 20%
Reduction of Area	≥ 30% (typical)
Hardness (HV)	~ 160–200 HV
Density	4.51 g/cm³
Elastic Modulus	~ 105 GPa

UNS R50400 Titanium Tube Manufacturing Process

ASTM B338 Grade 2 Titanium Tube Manufacturing Process

ASTM B338 Grade 2 Titanium Tube Surface Finish

Surface Finish	Key Characteristics	Typical Applications
Pickled & Cleaned (AP)	Clean matte surface, excellent corrosion resistance, free from scale	Heat exchangers, condensers, seawater cooling systems
Bright Annealed (BA)	Smooth, bright surface, improved cleanliness, reduced contamination risk	High-efficiency heat exchangers, chemical processing equipment
Polished Finish (Mechanical Polishing)	Very smooth surface, lower fouling tendency, improved heat transfer efficiency	Pharmaceutical, food-grade, precision heat exchangers
As-Drawn / Mill Finish	Economical option, may contain minor surface marks	Structural applications, non-critical heat exchange systems
Sand Blasted (Optional)	Uniform matte texture, improved coating adhesion	Special corrosion protection systems, engineered equipment

Heat Treatment of Grade 2 Titanium Heat Exchanger Tube

ASTM B338 Grade 2 Titanium Tubes are typically supplied in a fully annealed condition, which is the most stable and widely used heat treatment state for heat exchanger and condenser applications. Annealing is a critical process that optimizes the balance between strength, ductility, and corrosion resistance, ensuring consistent performance in demanding industrial environments.

Condition	Description	Purpose	Typical Application
Annealed (Standard Supply Condition)	Heated to controlled temperature and cooled under controlled conditions	Relieves internal stress, improves ductility, stabilizes mechanical properties	Heat exchangers, condensers, seawater cooling systems
Stress Relieved (Optional)	Low-temperature heat treatment after cold working or bending	Reduces residual stress from forming or fabrication	U-bend tubes, coil tubes, fabricated assemblies

Equivalent Grades of ASTM B338 Grade 2 Titanium Tube

Standard System	Equivalent Grade	Designation	Notes
ASTM / ASME (USA)	Grade 2	UNS R50400	Primary international standard for heat exchangers
EN (Europe)	Grade 2 Titanium	EN 3.7035	Commonly used in EU industrial applications
DIN (Germany)	Grade 2 Titanium	Ti Grade 3.7035	Aligned with EN titanium classifications
JIS (Japan)	TP340	JIS H4600	Closest Japanese equivalent to CP Grade 2
GB (China)	TA2	GB/T 3625	Widely used in chemical and marine applications
ISO	Grade 2 Titanium	ISO 5832 / ISO 9001 related specs	Harmonized international reference

ASTM B338 vs ASTM B861 Titanium Tube

ASTM B338 and ASTM B861 are two commonly referenced standards for titanium tubing, but they are designed for different engineering applications and product forms.

Item	ASTM B338	ASTM B861
Product Type	Titanium Tube	Titanium Pipe
Primary Use	Heat exchangers, condensers	Pressure piping systems
Design Focus	Heat transfer efficiency	Fluid transport & pressure containment
Typical Grades	Grade 1, Grade 2, Grade 7, Grade 12	Grade 2, Grade 7, Grade 12
Wall Thickness	Light to medium wall	Medium to heavy wall
Dimensional Control	Tight tolerances for heat exchanger fit-up	Pipe standard tolerances for flow systems
End Use Industry	Power plants, desalination, chemical heat exchangers	Chemical pipelines, industrial piping systems
Fabrication Form	Straight tube, U-tube, coil tube	Straight pipe sections

ASTM B338 (Titanium Tube)

ASTM B338 Grade 2 titanium tubes are specifically designed for:

Heat exchanger bundles

Condenser systems

Seawater cooling systems

High-efficiency thermal transfer applications

ASTM B861 (Titanium Pipe)

ASTM B861 titanium pipes are designed for:

Fluid transport systems

Chemical process piping

Pressure-bearing pipeline systems

Applications of Titanium Gr2 Tube

Shell & Tube Heat Exchangers

Typical Forms:

Straight tube

U-bend tube (U-tube bundle)

Surface Finish:

Pickled & Cleaned (standard)

Bright Annealed (high efficiency systems)

Heat Treatment:

Fully annealed (standard supply condition)

Condenser Systems

Typical Forms:

Straight tube

Tube bundle assembly

Surface Finish:

Pickled & Cleaned (preferred)

Bright Annealed (for high cleanliness systems)

Heat Treatment:

Fully annealed

Seawater Cooling Systems

Typical Forms:

Straight tube

U-bend tube

Coil tube (for compact systems)

Surface Finish:

Pickled & Cleaned (mandatory)

Heat Treatment:

Annealed (standard)

Stress-relieved after bending (U-tubes)

Desalination Plants

Typical Forms:

Straight tube

U-bend tube

Custom fabricated tube bundles

Surface Finish:

Pickled & Cleaned (standard requirement)

Bright Annealed (high-purity systems)

Heat Treatment:

Fully annealed

Chemical Processing Equipment

Typical Forms:

Straight tube

U-bend tube

Coil tube (reactor systems)

Surface Finish:

Bright Annealed (preferred)

Pickled & Cleaned

Heat Treatment:

Fully annealed

Stress relieved after fabrication

Offshore & Marine Engineering

Typical Forms:

Straight tube

U-bend tube

Coil tube

Tube bundle assemblies

Surface Finish:

Pickled & Cleaned (standard)

Heat Treatment:

Fully annealed

Stress-relieved after bending

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Inspection & Testing of ASTM B338 Grade 2 Titanium pipe

Eddy Current Testing (ECT)

Flaring Test

Flattening Test

Hydrostatic Testing

OD, WT, Length Measurement

Spectrographic / PMI Test

Ultrasonic Testing (UT)

Straightness & Ovality Check

All testing is conducted in accordance with ASTM B338 / ASME SB338 requirements and international quality standards to guarantee full compliance for global engineering projects.

Test Item	Method	Purpose
Chemical Composition Analysis	Spectrographic / PMI Test	Verify UNS R50400 compliance and element control
Mechanical Testing	Tensile, Yield, Elongation Test	Confirm strength and ductility performance
Dimensional Inspection	OD, WT, Length Measurement	Ensure compliance with engineering tolerances
Eddy Current Testing (ECT)	Non-destructive testing	Detect surface and near-surface defects
Ultrasonic Testing (UT)	NDT method	Detect internal defects in seamless tubes
Hydrostatic Testing	Water pressure test	Verify pressure resistance and integrity
Flattening Test	Compression test	Evaluate ductility and weld quality
Flaring Test	Expansion test	Confirm formability for tube sheet expansion
Visual Inspection	100% surface inspection	Detect scratches, cracks, and surface defects
Straightness & Ovality Check	Mechanical measurement	Ensure proper installation fit-up

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ASTM B338 Gr2 Titanium Tube Packaging & Shipping

ASTM B338 Gr2 Tube Packaging

Our packaging and logistics system is designed to protect titanium tubes during long-distance international transportation, including sea freight, air freight, and multimodal delivery for EPC projects worldwide.

Packaging Type
Plastic Caps Protection	Both ends of tubes are capped to prevent contamination and mechanical damage	Prevents internal contamination and edge deformation
Plastic Wrapping (Waterproof Film)	Each bundle is wrapped with waterproof PE film	Protects against moisture, seawater, and oxidation
Wooden Boxes / Plywood Cases	Strong export-grade wooden packing crates	Ensures structural protection during long-distance shipping
Steel Strapping Reinforcement	Tubes are securely bundled and reinforced with steel straps	Prevents movement and bending during transport
Labeling & Traceability Tags	Each bundle is labeled with grade, size, heat number	Ensures full traceability for EPC projects
Shock-Proof Internal Padding	Foam or soft material used inside crates	Prevents surface scratches and impact damage

Order Type	Lead Time
Stock sizes	3–7 days
Standard production	2–4 weeks
Custom OEM sizes	3–6 weeks
Large EPC projects	Negotiable based on schedule

Our Factory Equipment & Warehouse

Grade 2 Titanium Tube Supplier

Our production facility is equipped with a complete set of advanced titanium processing equipment, ensuring stable quality, precise dimensions, and reliable performance of every ASTM B338 Grade 2 Titanium Tube used in heat exchangers and industrial systems.

Equipment	Function	Engineering Purpose
Vacuum Arc Remelting (VAR) Furnace	Produces high-purity titanium ingots	Ensures stable chemical composition for UNS R50400 Grade 2 titanium
Hot Extrusion Press	Forms titanium billets into tube blanks	Provides uniform grain structure and base tube geometry
Cold Rolling Mill	Reduces wall thickness and improves precision	Enhances dimensional accuracy and mechanical strength
Cold Drawing Machine	Refines OD/WT and surface quality	Achieves tight tolerances for heat exchanger tubes
Bright Annealing Furnace	Controlled heat treatment process	Produces fully annealed condition for Grade 2 titanium tubes
Straightening Machine	Corrects tube bending and deformation	Ensures installation-ready straightness for tube bundles
Precision Cutting Machine	Fixed and custom length cutting	Supports engineering drawing requirements
Chamfering & End Finishing Machine	Tube end processing	Ensures proper fit-up in tube sheets and welding preparation

Our titanium tube warehouse

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FAQ

1. What is ASTM B338 Grade 2 titanium tube?

ASTM B338 Grade 2 Titanium Tube is a commercially pure titanium tube (UNS R50400) widely used in heat exchangers, condensers, seawater cooling systems, and chemical processing equipment due to its excellent corrosion resistance and weldability.

2. Is your ASTM B338 Grade 2 titanium tube original material?

Yes. All ASTM B338 Grade 2 titanium tubes are manufactured from 100% certified titanium raw materials.

100% virgin titanium sponge or billet
Fully traceable heat number
EN 10204 3.1 Mill Test Certificate (MTC)
Third-party inspection available upon request

We do not use recycled or mixed materials for heat exchanger grade tubes.

3. What payment terms do you accept?

Payment Method	Terms
T/T (Bank Transfer)	30% deposit, 70% before shipment
L/C at Sight	Accepted for large EPC projects
Trade Assurance	Available for selected markets
Negotiation	For long-term cooperation clients