ASTM B861 Titanium Alloy Seamless Pipe

This specification covers the requirements for 34 grades of titanium and titanium alloy seamless pipe intended for general corrosion resisting and elevated temperature service. Alloys may be supplied in the following conditions: Grades 5, 23, 24, 25, 29, 35, or 36 annealed or aged; Grades 9, 18, 28, or 38 cold-worked and stress-relieved or annealed; Grades 9, 18, 23, 28, or 29 transformed-beta condition; and Grades 19, 20, or 21 solution-treated or solution-treated and aged. The grades shall conform to the required chemical composition for nitrogen, carbon, hydrogen, iron, oxygen, aluminum, vanadium, tin, ruthenium, palladium, chromium, nickel, niobium, zirconium, silicon, and titanium. Chemical analysis and product analysis shall be performed. Mechanical requirements shall conform to the required room temperature values for tensile strength, yield strength, and elongation. The following shall also be performed: tension, flattening, bend, and hydrostatic tests.

 

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Chemical Composition of ASTM B861 Titanium Seamless Pipes

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

 

Aerospace & Defense:

Hydraulic systems (Grade 9, Grade 5)

Engine bleed air ducts (Grade 6, Grade 5)

Fuel lines (Grade 2, Grade 9)

Structural tubing (Grade 5, Grade 23)

Landing gear components (Grade 5)

Rocket motor casings (Grade 6)

 

Chemical Processing:

High-pressure reactors (Grade 2, Grade 12, Grade 7)

Heat transfer piping (Grade 2)

Acid handling lines (Grade 7, Grade 11, Grade 26)

Chlor-alkali production (Grade 2, Grade 7)

Nitric acid service (Grade 2, Grade 5)

 

Marine & Offshore:

Subsea control lines (Grade 2, Grade 9)

Seawater injection systems (Grade 2)

Riser auxiliary lines (Grade 2, Grade 12)

Ballast water treatment (Grade 2)

Deep-sea instrumentation housings (Grade 5)

 

Power Generation:

Geothermal brine lines (Grade 12, Grade 2)

Nuclear service piping (Grade 2, Grade 5)

FGD scrubber piping (Grade 2, Grade 7)

Steam turbine steam lines (Grade 5)

 

Oil & Gas:

Sour gas well completion (Grade 19, Grade 20, Grade 29)

High-pressure choke and kill lines (Grade 5)

Instrumentation tubing (Grade 9, Grade 2)

Subsea umbilical tubing (Grade 9)

 

Medical & Pharmaceutical:

Implantable device components (Grade 23)

Surgical instrument tubing (Grade 2, Grade 5)

Sterile process piping (Grade 2)

 

Cryogenics:

Liquid hydrogen transfer lines (Grade 1, Grade 2)

LNG systems (Grade 2)

Superconducting magnet housings (Grade 5)

 

Specification	Product Form	Size Range	Weld Seam	Primary Application
ASTM B861	Seamless Pipe	0.125–24 in NPS	None	High-pressure, critical service, aerospace, code applications
ASTM B862	Welded Pipe	0.5–36 in NPS	Longitudinal	General service, large diameters, cost-sensitive applications
ASTM B338	Tube (Seamless/Welded)	≤ 3 in OD	Optional	Condensers, heat exchangers

 

Our factory is equipped with a full range of advanced, in-house manufacturing equipment dedicated exclusively to titanium mill production. This includes rotary piercing mills and cold pilger lines for seamless tube and pipe, continuous strip welding lines with plasma arc and TIG systems for welded tube and large-diameter pipe, and precision slitting lines for titanium strip and coil. For flat products, we operate hot and cold rolling mills capable of producing plate and sheet up to 8,000 mm in length, supported by vacuum annealing furnaces for contamination-free heat treatment. Our bar and wire processing lines include forging presses, rolling mills, and multi-pass wire drawing machines with in-line annealing. All products are inspected using state-of-the-art non-destructive testing equipment, including multi-coil eddy current testers and immersion ultrasonic scanning systems, ensuring 100% inspection compliance with ASTM and ASME standards. From melting to final packaging, every process is controlled under one roof.

 

 

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