Project Description

Admiralty Brass tubes C44300 / CuZn28Sn1 / CZ111 Standard is ASTM B111

establishes the requirements for seamless tube and ferrule stock of copper and various copper alloys up to 3 Vs in. [80 mm] inclusive, in diameter, for use in surface condensers, evaporators, and heat exchangers. The following coppers and copper alloys are specified:

Copper or Copper Alloy UNS NO.Description
C44300/ CZ111/ C4430/ CuZn28Sn1Admiralty Metals, B, C, and D


Standard: ASTM B 111/B 111M, BS2871, JIS H3300, DIN1785

Description Name: ASTM B111 copper tubes, C44300 copper tubes, C44300 Admiralty brass tubes, C44300 admiralty brass pipes, CZ111 admiralty brass tubes, CuZn28Sn1 admiralty brass tubes.

Size: 8mm to 76mm

Wall Thickness: 0.5 to 6mm

Shape: Round

Length: Single random length/ Double random length or as customer’s actual request

Grade: C44300, C4430, CZ111, CuZn28Sn1

Referenced Documents:

  • ASTM Standards:
    B 153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing
  • B 154 Test Method for Mercurous Nitrate Test for Copper and Copper Alloys
  • B 170 Specification for Oxygen-Free Electrolytic Copper Refinery Shapes
  • B 224 Classification of Coppers
  • B 846 Terminology for Copper and Copper Alloys
  • B 858 Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys
  • E 8 Test Methods for Tension Testing of Metallic Materials E 8M Test Methods for Tension Testing of Metallic Materials [Metric]
  • E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
  • E 53 Test Methods for Determination of Copper in Unalloyed Coppers by Gravimetry
  • E 54 Test Methods for Chemical Analysis of Special Brasses and Bronzes5
  • E 62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods
  • E 75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys
  • E 76 Test Methods for Chemical Analysis of Nickel-Copper Alloys
  • E 112 Test Methods for Determining Average Grain Size E 243 Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes
  • E 255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
  • E 478 Test Methods for Chemical Analysis of Copper Alloys
  • E 527 Practice for Numbering Metals and Alloys (UNS)

Click to download the details of Admiralty Brass Tubes C44300 CuZn28Sn1 CZ111.

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Chemical Composition:

DesignationChemical Composition %
CuSnAlAsNiFeMnPb max.Zn





The world standard Grade equivalent to ASTM B111


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Material DesignationCorresponding Material Symbol
GB/T8890ASTM B111BS2871JIS H3300DIN1785
Aluminums BrassHAL77-2C68700CZ110C6870CuZn20Al2
Admiralty BrassHSn70-1C44300CZ111C4430CuZn28Sn1
Boric BrassHsn70-18
HSn70-1 AB
Arsenical BrassH68ACZ126
Brass TubeH65/H63C28000/C27200CZ108C2800/C2700CuZn36/CuZn37

Tensile Requirements

Copper or Copper Alloy UNS NO.Temper DesignationTensile Strength,Yield Strength,
StandardFormermin ksimin ksi

Expansion Test

  • Tube specimens selected for test shall withstand the expansion shown in standard when expanded in accordance with Test Method B 153. 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.

Flattening 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 is required to be performed only for Copper Alloy UNS Nos. C23000, C28000, C44300, C44400, C44500, C60800, C61300, C61400, and C68700.
  • Unless otherwise specified, the producer shall have the option of testing the product to either the mercurous nitrate test, Test Method B 154, or the ammonia vapor test, Test Method B 858, as prescribed below.


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Nondestructive Testing

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 E 243.

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!

P = hydrostatic pressure, psi [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].

Materials and Manufacture:

  • When specified in the purchase order or contract, the purchaser shall be furnished certification that samples representing each lot have been either tested or inspected as directed in this specification and requirements have been met.
  • When identified in the ordering information that product is purchased for ASME Boiler and Pressure Vessel Code applications, certification to this specification is mandatory.


  • Mill test certificates will be issued
  • All tubes shall be supplied as per applicable ASTM B111 /B 111M Specification.

Packing and Marking

  • Admiralty Brass tubes C44300 Packed in bundles or ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.

Packing photos

Admiralty Brass Tubes C44300 Package

Admiralty Brass Tubes C44300 Package

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