ASTM B861-24 is the:

Standard Specification for Titanium and Titanium Alloy Seamless Pipe

It covers 34 grades of titanium and titanium alloy seamless pipe intended for:

• General corrosion-resistant service

• Elevated-temperature service

ASTM B861 is a seamless pipe specification. It should be distinguished from ASTM B862 for welded titanium pipe and ASTM B338 for condenser and heat-exchanger tubes.

The exact titanium grade should be selected according to the process medium, design temperature, pressure, corrosion conditions and applicable piping code.

ASTM B861 Grades

ASTM B861 covers commercially pure titanium and multiple titanium alloy systems.

Representative grades include:

Grade 1 — UNS R50250

Unalloyed titanium.

Grade 1 provides relatively low strength and high ductility and is used where its corrosion resistance and fabrication characteristics meet the piping design requirements.

Grade 2 — UNS R50400

Unalloyed titanium and one of the most commonly specified commercially pure titanium grades.

It provides a practical combination of corrosion resistance, strength and fabrication performance for many chemical, seawater and industrial piping applications.

Grade 2H — UNS R50400

Uses the same UNS designation as Grade 2 but has a guaranteed minimum ultimate tensile strength of:

400 MPa [58 ksi]

ASTM identifies H-grade materials primarily for pressure-vessel applications.

Grade 5 — UNS R56400

Titanium alloy containing approximately:

6% Aluminum + 4% Vanadium

A higher-strength titanium alloy selected where the piping design requires substantially greater mechanical strength than commercially pure titanium.

Grade 7 — UNS R52400

Unalloyed titanium containing:

0.12–0.25% Palladium

The palladium addition provides enhanced corrosion resistance in specific aggressive environments.

Grade 9 — UNS R56320

Titanium alloy containing approximately:

3% Aluminum + 2.5% Vanadium

Provides higher strength than commercially pure titanium while retaining useful fabrication characteristics for applicable piping systems.

Grade 12 — UNS R53400

Titanium alloy containing approximately:

0.3% Molybdenum + 0.8% Nickel

Used in chemical and industrial piping where its specific combination of corrosion resistance and mechanical properties is required.

Other ASTM B861 Grades

ASTM B861 also covers additional titanium and titanium alloy grades, including palladium-bearing, ruthenium-bearing and higher-strength alloy systems.

Examples include:

Grades 3 / 11 / 13–21 / 23–29 / 33–38

H-grade variants are also included where applicable.

For procurement, the exact grade and UNS designation should always be stated rather than ordering simply as:

“ASTM B861 Titanium Pipe.”

Chemical Composition

ASTM B861 specifies chemical-composition requirements according to the individual titanium grade.

Controlled elements can include:

• Titanium

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

• Iron

• Aluminum

• Vanadium

• Palladium

• Ruthenium

• Nickel

• Molybdenum

• Chromium

• Niobium

• Zirconium

• Silicon

• Other grade-specific elements

Chemical analysis and product analysis are required by the standard.

The exact composition should be verified against the ordered ASTM B861 grade.

Mechanical Properties

ASTM B861 defines grade-specific room-temperature requirements for:

• Tensile strength

• Yield strength

• Elongation

Mechanical properties vary substantially between commercially pure titanium and higher-strength titanium alloys.

For elevated-temperature piping, room-temperature tensile properties alone should not be used to establish allowable design stress. The applicable design code and temperature-dependent material properties must also be considered.

Material Conditions & Heat Treatment

ASTM B861 specifies material conditions according to alloy grade.

Examples include:

Grades 5 / 23 / 24 / 25 / 29 / 35 / 36:
Annealed or aged

Grades 9 / 18 / 28 / 38:
Cold-worked and stress-relieved, or annealed

Grades 9 / 18 / 23 / 28 / 29:
Transformed-beta condition where specified

Grades 19 / 20 / 21:
Solution-treated, or solution-treated and aged

The required material condition should be specified together with the grade during purchasing.

Inspection & Testing

ASTM B861 includes applicable requirements for:

• Chemical analysis

• Product analysis

• Tensile testing

• Flattening testing

• Bend testing

• Hydrostatic testing

• Dimensional inspection

• Surface inspection

Additional nondestructive examination or project-specific inspection requirements should be stated in the purchase specification.

ASTM B861 vs ASTM B862

The principal difference is the pipe manufacturing method.

ASTM B861
Titanium and Titanium Alloy Seamless Pipe

ASTM B862
Titanium and Titanium Alloy Welded Pipe

The correct specification should be selected according to the required manufacturing method, piping design and project specification.

ASTM B861 vs ASTM B338

The primary difference is product form and application.

ASTM B861
Seamless titanium and titanium alloy pipe for general corrosion-resistant and elevated-temperature service

ASTM B338
Seamless and welded titanium and titanium alloy tubes for condensers and heat exchangers

For general seamless titanium piping, ASTM B861 is the relevant specification.

For condenser and heat-exchanger tube bundles, ASTM B338 is the application-specific specification.

Manufacturing & Supply Capability

ASTM B861 titanium pipe capability should be confirmed separately from FYN's carbon and alloy steel tube manufacturing range.

Supply availability is reviewed according to:

• ASTM B861 grade / UNS

• Outside diameter

• Wall thickness

• Length

• Material condition

• Quantity

• Testing requirements

Actual dimensions and production availability are confirmed against each RFQ.

FYN's carbon and alloy steel tube dimensional capability should not automatically be applied to ASTM B861 titanium pipe.

Applications

Chemical Process Piping

For chemical processing systems where the selected titanium grade is compatible with the process medium and operating conditions.

Seawater & Marine Piping

Titanium piping is used in applicable seawater systems where corrosion resistance is a key material-selection requirement.

Desalination Systems

For piping handling seawater, brine and compatible process fluids in desalination facilities.

Petrochemical Process Piping

For selected process systems where titanium or titanium-alloy material is specified due to the operating environment.

Elevated-Temperature Piping

Selected ASTM B861 grades can be used for elevated-temperature service where the grade, material condition and allowable stresses satisfy the applicable design requirements.

A single maximum service temperature should not be applied to all ASTM B861 grades.

Replacement Piping

For replacement projects where existing piping documentation specifies ASTM B861.

Material selection should verify:

• Existing grade / UNS

• Design pressure

• Design temperature

• Process medium

• Corrosion conditions

• Pipe dimensions

• Applicable design code

Documentation & Traceability

Available documentation should be confirmed according to the order requirements and can include:

• Mill Test Certificate

• Heat / lot traceability

• Chemical analysis

• Product analysis

• Mechanical test results

• Heat-treatment records

• Hydrostatic test records

• Dimensional inspection records

• Additional NDT records where specified

• Third-party inspection reports when arranged

Packing & Delivery

Typical export packing can include:

• Protective pipe bundles

• Wooden cases where required

• Pipe-end protection

• Identification tags

• Seaworthy export packing

• Project-specific marking

Titanium pipes should be protected against surface contamination and mechanical damage during handling and transportation.

Lead time depends on grade, dimensions, material condition, quantity and inspection requirements.

Information Required for Quotation

Please provide:

1. ASTM B861

2. Grade / UNS designation

3. Outside diameter

4. Wall thickness

5. Length

6. Material condition

7. Quantity

8. Design pressure

9. Design temperature

10. Process medium

11. Hydrostatic / additional NDT requirements

12. Inspection documentation

13. Third-party inspection requirements

14. Delivery destination

For engineering or replacement projects, send the existing MTC, piping specification, MTO or drawing for technical review.

PRODUCT ATTRIBUTES & PARAMETERS

Product Name:
ASTM B861 Titanium and Titanium Alloy Seamless Pipes

Standard:
ASTM B861-24

Standard Title:
Standard Specification for Titanium and Titanium Alloy Seamless Pipe

Material:
Titanium / Titanium Alloy

Product Type:
Seamless Pipe

Grades Covered:
34 Grades

Typical Grades:
Grade 1 / Grade 2 / Grade 5 / Grade 7 / Grade 9 / Grade 12

Typical UNS:
R50250 / R50400 / R56400 / R52400 / R56320 / R53400

Chemical Composition:
Grade-Specific

Mechanical Properties:
Grade- and Condition-Specific

Material Condition:
According to Grade and Specification

Testing:
Chemical Analysis / Product Analysis / Tensile / Flattening / Bend / Hydrostatic

Additional NDT:
As Specified

Documentation:
MTC / Inspection Records as Required

Third-Party Inspection:
Subject to Order Requirements

Typical Applications:
Chemical Process Piping / Seawater Piping / Marine Piping / Desalination / Petrochemical Piping / Elevated-Temperature Service

Packing:
Protective Bundles / Wooden Cases / Seaworthy Export Packing

MOQ:
According to Grade, Dimensions and Production Requirements

Lead Time:
According to Grade, Dimensions, Material Condition, Quantity and Inspection Requirements

REQUEST A QUOTATION

For an accurate quotation, please send:

ASTM B861 + Grade / UNS + OD × Wall Thickness × Length + Material Condition + Quantity

For process piping projects, please also provide:

Design Pressure + Design Temperature + Process Medium + Applicable Design Code + Testing Requirements

For replacement projects, send the existing MTC, MTO or piping specification for material verification.