ASTM B338 Grade 7 Titanium Seamless Pipe

Short Description:

ASTM B338 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium Seamless Pipe intended for surface condensers, evaporators, and heat exchangers.ASTM B338 Grade 7 Titanium Seamless Pipe

Product Detail

Product Tags

ASTM B338 Grade 7 Titanium Seamless Pipe
ASTM B338 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium Seamless Pipe
 
Standard:
ASTM B338 Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes
for Condensers and Heat Exchangers
ASTM B338 Grade 7—UNS R52400. Unalloyed titanium plus 0.12 to 0.25 % palladium Seamless Pipe intended for surface condensers, evaporators, and heat exchangers
 

ASTM B338 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
 
Materials and Manufacture
Seamless tube shall be made from hollow billet by any cold reducing or cold drawing process that will yield a product meeting the requirements ofthis specification. Seamless tube is produced with a continuous periphery in all stages of manufacturing operations.
 
Chemical Composition of ASTM B338 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
Product analysis tolerances, listed in Table 2, do not broaden the specified heat analysis requirements, but cover variations between different laboratories in the measurement of chemical content.
TABLE 2 Permissible Variations in Product Analysis
Element%
  Maximum or Specified Range Permissible Variation in Product Analysis
Aluminum 0.5 to 2.5 ±0.20
Aluminum 2.5 to 3.5 ±0.40
Carbon 0.10 +0.02
Chromium 0.1 to 0.2 ±0.02
Cobalt 0.2 to 0.8 ±0.05
Hydrogen 0.015 +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
Nickel 0.3 to 0.9 ±0.05
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 0.25 ±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 0.50 ±0.02
Vanadium 2.0 to 3.0 ±0.15
Residuals A (each) 0.1 +0.02
 
 
Tensile Requirements of ASTM B338 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
 

Testings
Flattening Test
Tubing shall withstand, without cracking, flattening under a load applied gradually at room temperature until the distance between the load platens is not more than H in. H is calculated as follows:
where:
H = the minimum flattened height, in. (mm),
t = the nominal wall thickness, in. (mm) and,
D =  the nominal tube diameter, in. (mm). 
For Grades 7: 
e =0.07 in. for all diameters

Flaring Test
For tube 3 1 ⁄ 2 in. (88 mm) in outside diameter and smaller, and 0.134 in. (3.4 mm) in wall thickness and thinner,a section of tube approximately 4 in. (102 mm) in length shall withstand being flared with a tool having a 60° included angle until the tube at the mouth of the flare has been expanded in accordance with Table 5.The flared end shall show no cracking or rupture visible to the unaided eye.
TABLE 4 Flaring Requirements
Grade Expansion of Inside Diameter,min, %
7 20
 
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:
where:
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. Hydrostatic pressure shall be maintained for not less than 5 s. 

Permissible Variation in Dimensions
Variations in dimensions from those specified shall not exceed the amounts prescribed in Table 5.
Straightness—The maximum uniform bow shall not exceed the values given in Table 6.
Squareness of Cut—The angle of cut of the end of any tube may depart from square by not more than 0.016 in./in. of diameter.
 
TABLE 5 Permissible Variations in Outside Dimensions Based on Individual Measurements
Outside Diameter, in. (mm) Diameter Tolerance,
in. (mm) A,B,C		 Permissible Variations D in
Wall Thickness, t, %
Under 1 (25.4), excl ±0.004 (±0.102) ±10
1 to 1 1 ⁄ 2 (25.4 to 38.1), excl ±0.005 (±0.127) ±10
1 1 ⁄ 2 to 2 (38.1 to 50.8), exc ±0.006 (±0.152) ±10
2 to 2 1 ⁄ 2 (50.8 to 63.5), excl ±0.007 (±0.178) ±10
2 1 ⁄ 2 to 3 1 ⁄ 2 (63.5 to 88.9), excl ±0.010 (±0.254) ±10

 
TABLE 6 Straightness
Length, ft (m) Maximum Curvature Depth of Arc
Over 3 to 6 (0.91 to 1.83), incl 1 ⁄ 8 in. (3.2 mm)
Over 6 to 8 (1.83 to 2.44), incl 3 ⁄ 1 6 in. (4.8 mm)
Over 8 to 10 (2.44 to 3.05), incl 1 ⁄ 4 in. (6.4 mm)
Over 10 (3.05) 1 ⁄ 4 in./any 10 ft (2.1 mm/m)
 
 
Finish
The finished tube shall be clean and free of foreign material, shall have smooth ends free ofburrs, and shall be free of injurious external and internal imperfections.
 

Packaging and Package Marking
The tube will be packaged in accordance with the manufacturer’s standard practice, unless otherwise agreed upon between the manufacturer and the purchaser and so stated in the purchase order.
 
Certification
Note:
All tubes shall be supplied as per applicable ASTM B338 /B338M Specification
Mill test certificates will be issued
We can provide 3.2 Certification according to the needs of you


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