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Non-Ferrous Metals · Pipes · ASTM B861

Titanium Grade 2 Pipes

In short: Titanium Grade 2 pipe to ASTM B861 (seamless) or B862 (welded) is used for seawater, chlorine and chemical lines where it is essentially immune to chloride pitting at ambient and moderate temperatures.

R50400
UNS number
4.51
density, g/cm³
3.1 / 3.2
EN 10204 certificates
4
Titanium Grade 2 product forms
Quote Titanium Grade 2 pipes →Sizes and weights
Titanium Grade 2 pipe weight by sizeCalculated at 4.51 g/cm³: ½" 0.73 kg/m; ¾" 0.97 kg/m; 1" 1.44 kg/m; 1¼" 1.95 kg/m; 1½" 2.32 kg/m; 2" 3.13 kg/m; 2½" 4.96 kg/m; 3" 6.49 kg/m; 4" 9.24 kg/m; 6" 16.24 kg/m; 8" 24.44 kg/m; 10" 34.65 kg/m; 12" 42.44 kg/m. Titanium Grade 2 pipe weight by size4.51 g/cm³ ½": 0.73 kg/m½"¾": 0.97 kg/m¾"1": 1.44 kg/m1"1¼": 1.95 kg/m1¼"1½": 2.32 kg/m1½"2": 3.13 kg/m2"2½": 4.96 kg/m2½"3": 6.49 kg/m3"4": 9.24 kg/m4"6": 16.24 kg/m6"8": 24.44 kg/m8"10": 34.65 kg/m10"12": 42.44 kg/m12" 42.4 NPS, Sch 40S · kg/m
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why Titanium Grade 2 in pipes

Most widely used CP titaniumImmune to seawater and wet chlorine corrosionGood weldability and formabilityAbout 57% of the density of steel

Commercially pure titanium forms a stable oxide that resists seawater and many oxidising chlorides better than stainless or nickel alloys in those conditions.

It is light (about 4.5 g/cm³), so weight per metre is roughly half that of steel pipe.

Specification

How to specify Titanium Grade 2 pipes

NPS ⅛" to 48" and larger (DN 6 – DN 1200+), schedules 5S to XXS, single random, double random and cut lengths

Titanium Grade 2 pipe cross-section, NPS 6 Sch 40S Engineering drawing showing outside diameter 168.28 mm and wall thickness 7.11 mm (ASTM B861 Titanium Grade 2). Wall thickness is exaggerated for clarity. OD 168.28 mm WT 7.11 mm NPS 6SCH 40S ASTM B861 Titanium Grade 2
Titanium Grade 2 pipes: ASTM B861 (seamless) / B862 (welded)
Specification
ASTM B861 (seamless) / B862 (welded)
UNS
R50400
Designation
UNS R50400

Sizes and weights

Titanium Grade 2 pipes sizes, weighed at 4.51 g/cm³

Other sizes on request. For general pipes information, such as manufacturing routes and end finishes, see the pipes guide.

Titanium Grade 2 pipe: wall (mm) / weight (kg/m) at 4.51 g/cm³, ASME B36.19M
NPSOD mmSch 5SSch 10SSch 40SSch 80S
½"21.341.65 / 0.462.11 / 0.572.77 / 0.733.73 / 0.93
¾"26.671.65 / 0.582.11 / 0.732.87 / 0.973.91 / 1.26
1"33.401.65 / 0.742.77 / 1.203.38 / 1.444.55 / 1.86
1¼"42.161.65 / 0.952.77 / 1.553.56 / 1.954.85 / 2.56
1½"48.261.65 / 1.092.77 / 1.793.68 / 2.325.08 / 3.11
2"60.331.65 / 1.372.77 / 2.263.91 / 3.135.54 / 4.30
2½"73.032.11 / 2.123.05 / 3.025.16 / 4.967.01 / 6.56
3"88.902.11 / 2.593.05 / 3.715.49 / 6.497.62 / 8.78
4"114.302.11 / 3.353.05 / 4.816.02 / 9.248.56 / 12.82
6"168.282.77 / 6.503.40 / 7.947.11 / 16.2410.97 / 24.45
8"219.082.77 / 8.493.76 / 11.478.18 / 24.4412.70 / 37.14
10"273.053.40 / 12.994.19 / 15.969.27 / 34.6512.70 / 46.85
12"323.853.96 / 17.954.57 / 20.679.53 / 42.4412.70 / 55.99

Chemistry

Titanium Grade 2 composition

UNS
R50400
Density
4.51 g/cm³
Titanium Grade 2 chemical composition, % (ASTM B265)
ElementLimit, %Why it matters
O0.25 max
Fe0.30 max
C0.08 max
N0.03 max
H0.015 max
TiBalance

Limits per ASTM B265; other product forms and specifications differ slightly. Your order's specification and edition govern.

Questions

About Titanium Grade 2 pipes

Why is titanium pipe so light?

Its density is about 4.5 g/cm³, close to half that of steel.

Is Grade 2 pipe used offshore?

Yes, for seawater and firewater systems in some designs.

From enquiry to dispatch

How a Titanium Grade 2 pipes order runs

  1. 01 EnquiryGrade, specification, size, quantity
  2. 02 ReviewChecked against your standard
  3. 03 InspectPMI, dimensions, TPI if required
  4. 04 CertifyEN 10204 3.1 / 3.2, heat traceable
  5. 05 ShipPacked and documented for the destination

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