ASTM B861 Grade 7 Titanium Seamless Pipe
ASTM B861 Grade 7 Titanium Seamless Pipe
ASTM B861 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium Seamless Pipe
Standard:
ASTM B861 Standard Specification for Titanium and Titanium Alloy Seamless Pipe
ASTM B861 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium Seamless Pipe intended for general corrosion resisting and elevated temperature service
ASTM B861 Grade 7 Titanium Seamless Pipe Quick Details
Manufacture:Seamless process ,Cold-drawn
Wall thickness(WT): 0.5 mm-12.7 mm.
Outer diameter (OD): 12.7 mm-219 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Additional Info
Port of Shipment: Tianjin, China
Payment Terms: T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
Manufacture
Seamless pipe may be manufactured by any method that will yield a product meeting the requirements of this specification.
Unless specified, cold worked pipe shall be heat treated at a temperature of not less than 1000°F (538°C). Hot worked pipe finishing above 1400°F (760°C) need not be further heat treated.
Chemical Composition of ASTM B861 Grade 7 Titanium Seamless Pipe
Table 1 Chemical Composition
| Chemical Composition(%) | ||||||||
| C,max | O,max | N,max | H,max | Fe,max | Pd,max |
Other Elements, max. each |
Other Elements, max. total |
Ti |
| 0.08 | 0.25 | 0.03 | 0.015 | 0.30 | 0.12-0.25 | 0.1 | 0.4 | Balance |
Product Analysis
When requested by the purchaser and stated in the purchase order,an analysis of chemical composition will be made on the finished product.
The product analysis tolerances, listed in Table 2 do not broaden the specified analysis requirements, but cover variations between different laboratories in the measurement of chemical content.
TABLE 2 Permissible Variations in Product Analysis
| Element | Product Analysis Limits, Permissible Variation | |
| max or Range,% | in Product Analysis | |
| Aluminum | 0.5 to 2.5 | ±0.20 |
| Aluminum | 2.5 to 6.75 | ±0.40 |
| Carbon | 0.10 | +0.02 |
| Chromium | 0.1 to 0.2 | ±0.02 |
| Chromium | 5.5 to 6.5 | ±0.30 |
| Hydrogen | 0.02 | +0.002 |
| Iron | 0.80 | +0.15 |
| Iron | 1.2 to 1.8 | ±0.20 |
| Molybdenum | 0.2 to 0.4 | ±0.03 |
| Molybdenum | 1.5 to 4.5 | ±0.20 |
| Molybdenum | 14.0 to 16.0 | ±0.50 |
| Nickel | 0.3 to 0.9 | ±0.05 |
| Niobium | 2.2 to 3.2 | ±0.15 |
| Niobium | >30 | ±0.50 |
| Nitrogen | 0.05 | +0.02 |
| Oxygen | 0.30 | +0.03 |
| Oxygen | 0.31 to 0.40 | ±0.04 |
| Palladium | 0.01 to 0.02 | ±0.002 |
| Palladium | 0.04 to 0.08 | ±0.005 |
| Palladium | 0.12 to 0.25 | ±0.02 |
| Ruthenium | 0.02 to 0.04 | ±0.005 |
| Ruthenium | 0.04 to 0.06 | ±0.005 |
| Ruthenium | 0.08 to 0.14 | ±0.01 |
| Silicon | 0.06 to 0.40 | ±0.02 |
| Vanadium | 2.0 to 4.5 | ±0.15 |
| Vanadium | 7.5 to 8.5 | ±0.40 |
| Zirconium | 3.5 to 4.5 | ±0.20 |
| Residuals A (each) | 0.15 | +0.02 |
Tensile Requirements of ASTM B861 Grade 7 Titanium Seamless Pipe
TABLE 3 Tensile Requirements
| Grade | Tensile Strength, min | Yield Strength (0.2 % Offset) | Elongation 2 in. Or 50 mm | ||||
| ksi | (MPa) | min. | max. | gage length,min % | |||
| ksi | (MPa) | ksi | (MPa) | ||||
| 7 | 50 | (345) | 40 | (275) | 65 | (450) | 20 |
Permissible Variations in Dimensions
Diameter—Variations in outside diameter shall not exceed those prescribed in Table 4.
Thickness—The variation in thickness at any point shall not be more than ±12.5 % of the nominal wall thickness specified.
Length—Pipe shall be furnished in lengths as specified in the purchase order. No pipe shall be under the specified length and not more than 1 ⁄ 4 in. (6.4 mm) over that specified.
Straightness—The pipe shall be free of kinks and bends and the maximum bow of lengths up to 10 ft (3 m) shall not exceed 1:500. For lengths greater than 10 ft, the maximum bow shall not exceed 1:400.
TABLE 4 Permissible Variations in Diameter
| Nominal Outside Diameter (NPS) | Permissible Variations in Outside Diameter | |
| Over | Under | |
| 1 ⁄ 8 in. to 1 1 ⁄ 2 in. (3.2 mm to 38 mm) | 1 ⁄ 64 in. (0.397 mm) | 1 ⁄ 32 in. (0.794 mm) |
| over 1 1 ⁄ 2 in. to 4 in. (38 mm to 102 mm) | 1 ⁄ 32 in. (0.794 mm) | 1 ⁄ 32 in. (0.794 mm) |
| over 4 in. to 8 in. (102 mm to 203 mm) | 1 ⁄ 1 6 in. (1.588 mm) | 1 ⁄ 32 in. (0.794 mm) |
| over 8 in. to 18 in. (203 mm to 432mm) | 3 ⁄ 32 in. (2.382 mm) | 1 ⁄ 32 in. (0.794 mm) |
Finish
The finished pipe shall have smooth ends, be free of burrs, and shall be free of injurious external and internal imperfections of a nature that will interfere with the purpose.
Testings
Bending Test
Pipe 2 in. (51 mm) and under in nominal diameter,shall be capable of being bent cold through 90° around a cylindrical mandrel which is twelve times the nominal diameter of the pipe, without developing cracks.
Flattening Test
Seamless pipe shall be capable of withstanding, without cracking, flattening under a load applied gradually at room temperature until the distance between the load platens is H inches. H is calculated as follows:
H = Minimum flattened height, in. (mm),
t = nominal wall thickness, in. (mm) and,
D = nominal pipe diameter, in. (mm) (not pipe size), and For Grades 7Titanium Seamless Pipe :
e = 0.04 through 1 in. pipe size, and
e = 0.06 over 1 in. pipe size.
Hydrostatic Test
Each length of pipe shall withstand, without showing bulges, leaks, or other defects, an internal hydrostatic pressure that will produce in the pipe wall a stress of 50 % of the minimum specified yield strength at room temperature. This pressure shall be determined by the equation:
P = minimum hydrostatic test pressure, psi (or MPa),
S = allowable fiber stress of one-half the minimum yield strength, psi (or MPa),
t = wall thickness, in. (or mm),
R o = outside tube radius, in. (or mm), and
E = 1.0 seamless pipe.
The maximum hydrostatic test pressure shall not exceed 2500 psi (17.2 MPa) for sizes 3 in. (76 mm) and under, or 2800 psi (19.3 MPa) for sizes over 3 in. (76 mm). Hydrostatic pressure shall be maintained for not less than 5 s.
Terminology
lot, n—a number ofpieces ofpipe ofthe same nominal size and wall thickness manufactured by the same process from a single heat of titanium or titanium alloy and heat treated by the same furnace parameters in the same furnace.
seamless pipe, n—a hollow tubular product produced with a continuous periphery in all stages of manufacture.
Certification
We supply at least one copy of the report certifying that the material supplied has been manufactured, inspected, sampled, and tested in accordance with the requirements of this specification and that the results of chemical analysis, tensile, and other tests meet the requirements of this specification for the grade specified. The report shall include results of all chemical analysis, tensile tests, and all other tests required by the specification.
Photo of ASTM B861 Grade 7 Titanium Seamless Pipe
Please fill the following form.
![field:title/]](/uploads/221201/1-2212011A425N2.jpg)
![field:title/]](/uploads/221201/1-2212011H352B7.jpg)
![field:title/]](/uploads/221201/1-221201163P3326.jpg)
![field:title/]](/uploads/221201/1-22120116141H01.jpg)
![field:title/]](/uploads/221201/1-221201155930406.jpg)
![field:title/]](/uploads/221201/1-221201151533630.jpg)
![field:title/]](/uploads/221201/1-22120110332b02.png)