ASTM B862-23

Current Revision
Standard Specification for Titanium and Titanium Alloy Welded Pipe

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This specification covers the requirements for 33 grades of titanium and titanium alloy welded pipe intended for general corrosion resisting and elevated temperature service.

Welded pipe shall be made from annealed flat-rolled products by a welding process. Welded pipe may be further reduced by cold working or hot working.

Grades 1, 2, 2 H, 7, 7H, 11, 13, 14, 16, 16H, 17, 26H, 33, and 37 shall be furnished as welded or annealed.

Grades 3, 12, 15, and 34 shall be furnished as annealed.

Grade 5, 23, 24, 25, 35 shall be furnished as annealed, or aged.

Grade 9, 18, 38 shall be furnished as annealed.

Grade 19, 20, 21 shall be furnished as solution treated, or solution treated and aged.

The materials shall conform to the required chemical composition for nitrogen, carbon, hydrogen, iron, oxygen, aluminum, vanadium, tin, ruthenium, palladium, cobalt, molybdenum, chromium, nickel, niobium, zirconium, silicon, and titanium.

They shall also conform to the required mechanical properties such as tensile strength, yield strength, and elongation.

1.1Β This specification covers the requirements for 33 grades of titanium and titanium alloy welded pipe intended for general corrosion resisting and elevated temperature service as follows:

  • 1.1.1 Grade 1β€”UNS R50250. Unalloyed titanium,
  • 1.1.2 Grade 2β€”UNS R50400. Unalloyed titanium,
    • 1.1.2.1 Grade 2Hβ€”UNS R50400. Unalloyed titanium (Grade 2 with 58 ksi (400 MPa) minimum UTS),
  • 1.1.3 Grade 3β€”UNS R50550. Unalloyed titanium,
  • 1.1.4 Grade 5β€”UNS R56400. Titanium alloy (6 % aluminum, 4 % vanadium),
  • 1.1.5 Grade 7β€”UNS R52400. Unalloyed titanium plus 0.12 % to 0.25 % palladium,
    • 1.1.5.1 Grade 7Hβ€”UNS R52400. Unalloyed titanium plus 0.12 % to 0.25 % palladium (Grade 7 with 58 ksi (400 MPa) minimum UTS),
  • 1.1.6 Grade 9β€”UNS R56320. Titanium alloy (3 % aluminum, 2.5 % vanadium),
  • 1.1.7 Grade 11β€”UNS R52250. Unalloyed titanium plus 0.12 % to 0.25 % palladium,
  • 1.1.8 Grade 12β€”UNS R53400. Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
  • 1.1.9 Grade 13β€”UNS R53413. Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
  • 1.1.10 Grade 14β€”UNS R53414. Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
  • 1.1.11 Grade 15β€”UNS R53415. Titanium alloy (0.5 % nickel, 0.05 % ruthenium),
  • 1.1.12 Grade 16β€”UNS R52402. Unalloyed titanium plus 0.04 % to 0.08 % palladium,
    • 1.1.12.1 Grade 16Hβ€”UNS R52402. Unalloyed titanium plus 0.04 % to 0.08 % palladium (Grade 16 with 58 ksi (400 MPa) minimum UTS),
  • 1.1.13 Grade 17β€”UNS R52252. Unalloyed titanium plus 0.04 % to 0.08 % palladium,
  • 1.1.14 Grade 18β€”UNS R56322. Titanium alloy (3 % aluminum, 2.5 % vanadium plus 0.04 % to 0.08 % palladium),
  • 1.1.15 Grade 19β€”UNS R58640. Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum),
  • 1.1.16 Grade 20β€”UNS R58645. Titanium alloy (3 % aluminum, 8 % vanadium, 6 % chromium, 4 % zirconium, 4 % molybdenum) plus 0.04 % to 0.08 % palladium,
  • 1.1.17 Grade 21β€”UNS R58210. Titanium alloy (15 % molybdenum, 3 % aluminum, 2.7 % niobium, 0.25 % silicon),
  • 1.1.18 Grade 23β€”UNS R56407. Titanium alloy (6 % aluminum, 4 % vanadium, extra low interstitial, ELI),
  • 1.1.19 Grade 24β€”UNS R56405. Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.04 % to 0.08 % palladium,
  • 1.1.20 Grade 25β€”UNS R56403. Titanium alloy (6 % aluminum, 4 % vanadium) plus 0.3 % to 0.8 % nickel and 0.04 % to 0.08 % palladium,
  • 1.1.21 Grade 26β€”UNS R52404. Unalloyed titanium plus 0.08 % to 0.14 % ruthenium,
    • 1.1.21.1 Grade 26Hβ€”UNS R52404. Unalloyed titanium plus 0.08 % to 0.14 % ruthenium (Grade 26 with 58 ksi (400 MPa) minimum UTS),
  • 1.1.22 Grade 27β€”UNS R52254. Unalloyed titanium plus 0.08 % to 0.14 % ruthenium,
  • 1.1.23 Grade 28β€”UNS R56323. Titanium alloy (3 % aluminum, 2.5 % vanadium) plus 0.08 % to 0.14 % ruthenium,
  • 1.1.24 Grade 29β€”UNS R56404. Titanium alloy (6 % aluminum, 4 % vanadium with extra low interstitial elements (ELI)) plus 0.08 % to 0.14 % ruthenium,
  • 1.1.25 Grade 33β€”UNS R53442. Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
  • 1.1.26 Grade 34β€”UNS R53445. Titanium alloy (0.4 % nickel, 0.015 % palladium, 0.025 % ruthenium, 0.15 % chromium),
  • 1.1.27 Grade 35β€”UNS R56340. Titanium alloy (4.5 % aluminum, 2 % molybdenum, 1.6 % vanadium, 0.5 % iron, 0.3 % silicon),
  • 1.1.28 Grade 37β€”UNS R52815. Titanium alloy (1.5 % aluminum),
  • 1.1.29 Grade 38β€”UNS R54250. Titanium alloy (4 % aluminum, 2.5 % vanadium, 1.5 % iron), and
  • 1.1.30 Grade 39β€”UNS R53390. Titanium alloy (0.25 % iron, 0.4 % silicon).

Note 1:Β H grade material is identical to the corresponding numeric grade (that is, Grade 2H = Grade 2) except for the higher guaranteed minimum UTS, and may always be certified as meeting the requirements of its corresponding numeric grade. Grades 2H, 7H, 16H, and 26H are intended primarily for pressure vessel use.

1.2Β Pipe 8 in. NPS (nominal pipe size) and larger is most frequently custom made for an order. In such cases, the purchaser carefully should consider the applicability of this specification. Since the pipe is custom made, the purchaser may choose a wall thickness other than those in Table 1 to meet specific operating conditions. The purchaser may also be better served to specify only the portions of this specification that are

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