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ASTM-B241:2012 Edition

ASTM-B241:2012 Edition

$44.96

B241/B241M-12 Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube

Published By Publication Date Number of Pages
ASTM 2012 20
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ASTM B241/B241M-12

Historical Standard: Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube

ASTM B241/B241M

Scope

1.1 This specification2 covers aluminum and aluminum–alloy seamless pipe in the alloys (Note 1) and tempers shown in Table 1 [Table 2] and seamless extruded round tube in the alloys and tempers shown in Table 3 [Table 4] intended for pressure applications. The standard sizes for seamless pipe are listed in Table 16.7 of ANSI H35.2 and H35.2M. Nonstandard alloys, tempers, and sizes of pipe are produced as seamless extruded tube.

TABLE 1 Tensile Property Limits for Pipe, Inch-Pound UnitsA,B
A The basis for establishment of tensile property limits is shown in Annex A1.
B For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 0.1 ksi, and each value for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E29.
C Elongation of full-section and cut-out sheet-type specimens is measured in 2 in.; of round specimens, in 4 × specimen diameter.
D For wall thicknesses less than 0.250 in., the minimum elongation is 8 %.
E For wall thickness 0.050 to 0.259 in., the minimum elongation is 10 %.
F For wall thickness 0.260 to 0.500 in., the minimum elongation is 12 %.
G For wall thickness less than 0.125 in., the minimum elongation is 8 %.

TABLE 2 Tensile Property Limits for Pipe [SI Units]A ,B
A The basis for establishment of mechanical property limits is shown in Annex A1.
B For purposes of determining conformance with this specification, each value for ultimate strength and yield strength shall be rounded to the nearest 1 MPa, and each value for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E29.
C Elongations in 50 mm apply for pipe tested in full-section and to sheet type specimens taken from pipes having a wall up to 12.50 mm thick. Elongations in 5D where D and A are diameter and cross-sectional area of the specimens respectively, apply to round test specimens machined from wall thicknesses over 6.30 mm.
D For wall thicknesses up through 6.30 mm the minimum elongation is 8 %.
E For wall thicknesses over 1.25 through 6.60 mm, the minimum elongation is 10 %.
F For wall thicknesses over 6.60 through 12.50 mm, the minimum elongation is 12 %.
G For wall thicknesses up through 3.20 mm the minimum elongation is 8 %.

TABLE 3 Tensile Property Limits for Extruded Tube, Inch-Pound UnitsA,B
A The basis for establishment of mechanical property limits is shown in Annex A1.
B To determine conformance to this specification, each value for ultimate strength and for yield strength shall be rounded to the nearest 0.1 ksi and each value for elongation to the nearest 0.5 %, both in accordance with the rounding-off-method of Practice E29.
C Elongation of full-section and cut-out sheet-type specimens is measured in 2 in.; of round specimens, in 4 × specimen diameter. See 9.1.1 for conditions under which measurements are not required.
D Tests for tensile properties in the F temper are not required.
E For stress relieved tempers (T3510, T3511, T4510, T4511, T5510, T5511, T6510, T6511, T73510, T73511, T8510, T8511), characteristics and properties other than those specified may differ somewhat from the corresponding characteristics and properties of material in the basic tempers.
F Formerly designated T42 temper. When properly aged (precipitation heat-treated) 6063-T1 extruded products are designated T5.

TABLE 4 Tensile Property Limits for Extruded Tube [SI Units]A,B
A The basis for establishment of tensile property limits is shown in Annex A1.
B To determine conformance to this specification, each value for tensile strength and yield strength shall be rounded to the nearest 1 MPa and each value for elongation to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E29.
C Elongation in 50 mm apply for shapes tested in full section and for sheet-type specimens machined from material up through 12.5 mm in thickness having parallel surfaces. Elongations in 5 D where D and A are diameter and cross-sectional area of the specimen respectively, apply to round test specimens machined from thicknesses over 6.30. See 9.1.1 for conditions under which measurements are not required.
D No mechanical properties are specified or guaranteed.
E For stress-relieved tempers (T3510, T3511, T4510, T4511, T5510, T5511, T6510, T6511, T73510, T73511, T76510, T76511, T8510, T8511), characteristics and properties offer than those specified may differ somewhat from the corresponding characteristics and properties of material in the basic tempers.
F Material in the T42 and T62 tempers is not available from the material producers.
G For Table 12.1 in both ASD and ASD(M):

For purposes of harmonization, the 5D and 50 mm elongation limits were established to match extruded tube elongation values previously published in EN 755-2 [1997]. The relationship among the US customary and metric elongation values does not comply with the conversion rules of the Aluminum Association.

Note 1—Throughout this specification, use of the term alloy, in the general sense, includes aluminum as well as aluminum alloy.
Note 2—For other seamless drawn tubes, see Specification B210 or Specification B483/B483M. For extruded tube see Specification B221, and for structural pipe and tube see Specification B429/B429M.

1.2  Alloy and temper designations are in accordance with ANSI H35.1/H35.1M. The equivalent Unified Numbering System alloy designations are those of Table 5preceded by A9, for example, A91100 for aluminum 1100 in accordance with Practice E527.

1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4.1 The SI units are shown either in brackets or in separate tables.

Keywords

aluminum alloy; seamless extruded tube; seamless pipe

ICS Code

ICS Number Code 77.150.10 (Aluminium products)

DOI: 10.1520/B0241_B0241M-12

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