90/10 Copper Nicke Tube 70/30 Copper Nickel Pipe

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ASTM B111 C44300 Brass Seamless Tubes

ASTM B111 C68700 Brass Seamless Tube

SB111 SB466 C70600 | EEMUA 234 UNS 7060X

SB 111 SB 466 C71500 70/30 Seamless Tube

Heat exchanger tubes in various copper alloys in all standard dimension. High-precision surfaces and dimensions form the basis for the exceptional quality of our products.

• Copper alloys excellent properties:
      – High Heat Conductivity
      – Excellent Corrosion Resistance Properties (Compared to stainless steel)

• Specific Alloys (such as special brass, aluminium-bronze, copper-nickel) are adapted for ideal performance under various operating conditions.

90/10 Copper Nicke Tube, 70/30 Copper Nickel Pipe Copper nickel alloy grades mainly include C70600 and C71500 used in marine service which are generally available in most product forms. These are copper base alloys with either 10% or 30% of nickel, and are described as 90-10 (C70600) and 70-30 (C71500) copper-nickel respectively. Both alloys contain small but important additions of iron and manganese which have been chosen to provide the best combination of resistance to flowing seawater and overall corrosion resistance.

The 30% nickel alloy is stronger and can withstand higher seawater velocities but, for most applications, the C70600 alloy provides good service at a lower cost and of the two alloys tends to be the one that is more widely used. Their US and European alloy designations are given in Table 1.

Also worthy of mention is a modified 30%Ni alloy containing 2%Mn and 2% Fe, which is only commercially available as condenser tubing and is being used particularly in the heat rejection section of multistage flash desalination units where higher resistance to impingement corrosion is required.

90/10 Copper Nicke Tube, 70/30 Copper Nickel Pipe, however, are readily welded by most common methods. Consumables of the C71500 alloy should be used to weld both alloys. For welding copper-nickel to steel, 65% nickel-copper alloy consumables should be used as they can tolerate more iron dilution from the steel than the C71500 copper-nickel alloy consumables.

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Although ranges for elements in the chemical compositions vary between standards, grades of the C70600 and C71500 alloys suitable for welding generally fall within the limits given in Table 2. Maximum levels are defined for some specific impurities because of their effects on hot ductility, hot workability, and weldability. These elements can also arise from external contamination and therefore precautions are necessary when the alloys are handled during forming and welding. The 2%Mn and 2%Fe grade is produced as seamless tube for expanding into tube sheets so that welding is not necessary. A companion welding product is not available.

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Weld consumable specifications and compositions are shown in Table 3. They contain small titanium additions to counteract atmospheric contamination during welding operations.

seamless tube and ferrule stock of copper and various copper

alloys up to 31⁄8 in. [80 mm] inclusive, in diameter, for use in

C71000 . . . 80-20 Copper-Nickel

C71500 . . . 70-30 Copper-Nickel

surface condensers, evaporators, and heat exchangers. The following coppers and copper alloys are specified:3 (Warn- ing—Mercury is a definite health hazard in use and disposal.

C71520

C71640

70-30 Copper-Nickel—

Welding Grade Copper-nickel-iron- manganese

(See 12.1.))

Copper or Copper Alloy UNS No.

Previously Used

Designation Description

C72200 . . . . . .

A Designations listed in Classification B224.

Tubes of Copper Alloy UNS No. C19200 shall be supplied in any one of the following tempers, one of which

Temper

C23000 99.8

C28000 99.7

C44300 99.6

C44400 99.6

C44500 99.6

C68700 99.5

shall be specified: (1) annealed (O61), (2) light-drawn (H55),

(3) hard-drawn (H80), or (4) hard-drawn, and end-annealed (HE80).

TABLE 3 Tensile Requirements—SI Values

NOTE 1—See Table 2 for tensile requirements—inch-pound values.

C60800, C61300, C61400, and C68700 be subjected to a stress-relieving thermal treatment subsequent to straightening. If required, this must be specified on the purchase order or contract. Tolerances for roundness and length, and the condi- tion of straightness, for tube so ordered, shall be to the requirements agreed upon between the manufacturer and the purchaser.

Mechanical Properties

Material specified to meet the requirements of the ASME Boiler and Pressure Vessel Code shall have tensile properties as prescribed in Table 2 or Table 3.

Grain Size for Annealed Tempers

Grain size shall be a standard requirement for all product in the annealed (O61) temper.

Samples of annealed-temper tubes selected for test shall be subjected to microscopical examination per Test Methods E112 at a magnification of 75 diameters and shall show uniform and complete recrystallization.

Products other than of Copper Alloy UNS Nos. C19200 and C28000 shall have an average grain size within the limits of 0.010 to 0.045 mm. These requirements do not apply to tubes of light-drawn (H55), hard-drawn (H80), hard-drawn and end-annealed (HE80), or drawn and stress-relieved tem- pers (HR50).

Expansion Test

Tube specimens selected for test shall withstand the expansion shown in Table 4 when expanded in accordance with

Test Method B153. The expanded tube shall show no cracking or rupture visible to the unaided eye.

Hard-drawn tubes not end annealed are not subject to this test. When tubes are specified end annealed, this test is required and shall be performed on the annealed ends of the sampled tubes.

Tubes for ferrule stock are not subject to the expansion test.

Test Method—Each test specimen shall be flattened in a press at three (3) places along the length, each new place to be rotated on its axis approximately one third turn from the last flattened area. Each flattened area shall be at least 2 in. in length. A flattened test-specimen shall allow a micrometer caliper set at three (3) times the wall thickness to pass freely over the flattened area. The flattened areas of the test specimen shall be inspected for surface defects.

During inspection, the flattened areas of the test- specimen shall be free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.

Tubes for ferrule stock are not subject to flattening test.

Residual Stress Test

A residual stress test, when specified in the purchase order, is required only for Copper Alloy UNS Nos. C23000, C28000, C44300, C44400, C44500, C60800, C61300, C61400, and C68700 and when not supplied in an annealed temper.

Unless otherwise specified, the producer shall have the option of testing the product to either the mercurous nitrate test, Test Method B154, or the ammonia vapor test, Test Method B858, as prescribed below.

1. Mercurous Nitrate Test:

   1. Warning—Mercury is a definite health hazard and therefore equipment for the detection and removal of mercury vapor produced in volatilization is recommended. The use of rubber gloves in testing is advisable.

   2. The test specimens, cut 6 in. [150 mm] in length, shall withstand without cracking, an immersion in the standard mercurous nitrate solution prescribed in Test Method B154. The test specimen shall include the finished tube end.

2. Ammonia Vapor Test:

   1. The test specimens, cut 6 in. [150 mm] in length, shall withstand without cracking ,the ammonia vapor test as prescribed in Test Method B858. For the purposes of this specification, unless otherwise agreed between purchaser and supplier, the risk level identified in the Annex of Method B858, shall be specified as risk level (pH value) of 10.

Nondestructive Testing

Each tube shall be subjected to the eddy-current test in

13.1.1. Tubes may be tested in the final drawn, annealed, or heat-treated temper or in the drawn temper before the final anneal or heat treatment unless otherwise agreed upon by the supplier and the purchaser. The purchaser may specify either of the tests in 13.1.2 or 13.1.3 as an alternative to the eddy-current test.

Eddy-Current Test—Each tube shall be passed through an eddy-current testing unit adjusted to provide information on the suitability of the tube for the intended application. Testing shall follow the procedures of Practice E243.

The depth of the round-bottom transverse notches and the diameters of the drilled holes in the calibrating tube used to adjust the sensitivity of the test unit are shown in Tables 5 and 6, and Tables 7 and 8, respectively.

Tubes that do not actuate the signaling device of the eddy-current tester shall be considered to conform to the requirements of this test. Tubes causing irrelevant signals because of moisture, soil, and like effects may be reconditioned and retested. Such tubes, when retested to the original test parameters, shall be considered to conform if they do not cause output signals beyond the acceptable limits. Tubes causing irrelevant signals because of visible and identifiable handling marks may be retested by the hydrostatic test prescribed in 13.1.2, or the pneumatic test prescribed in 13.1.3. Tubes meeting requirements of either test shall be considered to conform if the tube dimensions are within the prescribed limits, unless otherwise agreed upon between the manufacturer and the purchaser.

Hydrostatic Test—Each tube shall stand, without showing evidence of leakage, an internal hydrostatic pressure sufficient to subject the material to a fiber stress of 7000 psi [48 MPa] as determined by the following equation for thin hollow cylinders under tension. The tube need not be tested at a hydrostatic pressure of over 1000 psi [7.0 MPa] unless so specified.

P 5 2St/~D 2 0.8t!

where:

P = hydrostatic pressure, psig [MPa];

t = thickness of tube wall, in. [mm];

D = outside diameter of the tube, in. [mm]; and

S = allowable stress of the material, psi [MPa].

Pneumatic Test—Each tube shall be subjected to an internal air pressure of 60 psig [400 kPa], min, for 5 s without

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