C44300/ CZ111/ C4430/ Cuzn28sn1 Alloy Copper Brass Tubes

• Customization: Available
• Type: Copper Pipe
• Application: Building, Sanitation, Seawater Desalination
• Model NO.: C44300/ CZ111/ C4430/ CuZn28Sn1 Alloy Copper
• Material: Copper Pipe
• Shape: Round/Customized
• Alloy: Alloy
• Color: Yellow
• Standard: as Per Client′s Design
• Length: 10mm-12000mm
• Process: Bending, Decoiling, Welding, Punching, Cutting
• Diameter: 4mm, 6mm, 8mm, 10mm, 12mm, 15mm, 18mm, 22mm, 28mm,
• End: Plain End/Bevel End
• Test: BV, SGS Is Available
• Model Number: C44300/ CZ111/ C4430/ Cuzn28sn1
• Processing: Customized
• Wall Thickness: 1mm~220mm (Sch5X~Sch Xxs)
• Used: Factory, Decoration, Food
• Packing: Standard Sea Worthy Package
• Delivery Time: 10-30 Working Days
• MOQ: 1 Ton
• Technical: Hot Rolled/Cold Drawn
• Outside Diameter: 8mm, 10mm, 12mm, 15mm, 18mm, 28mm, 35mm, 42mm, etc
• Transport Package: Woven Bag/Wooden Case
• Specification: Brass/Copper
• Trademark: EZS
• Origin: China
• Production Capacity: 1000000 Kgs/Year

Product Description

 

Product Description

 

Analysis of C44300/ CZ111/ C4430/ CuZn28Sn1 Copper Tubes

1. Chemical Composition

Alloy Designation	Cu (%)	Zn (%)	Sn (%)	Other Elements
C44300/ C4430/ CuZn28Sn1	70 - 73	26 - 29	0.7 - 1.1	Usually contains trace amounts of P (phosphorus) for deoxidation, with total impurities generally less than 0.5% In some standards, small amounts of Fe (iron) and Pb (lead) may also be present within specified limits
CZ111 (European equivalent)	Similar to the above, with Cu around 70 - 73, Zn around 26 - 29, and Sn around 0.7 - 1.1			Also has trace elements within the allowable range as per European standards

The addition of tin (Sn) to the copper - zinc alloy significantly enhances its corrosion resistance and mechanical properties. Phosphorus is added to improve the quality of the alloy by reducing oxide inclusions.

2. Physical Properties

Property	C44300/ CZ111/ C4430/ CuZn28Sn1
Density (g/cm³)	Approximately 8.5 - 8.6, which is relatively lower than some pure copper - based materials due to the addition of zinc and other elements
Thermal Conductivity (W/(m·K))	Good thermal conductivity, typically in the range of 100 - 120 W/(m·K), lower than pure copper but still suitable for heat - transfer applications where corrosion resistance is also required
Electrical Conductivity	Fair electrical conductivity. While not as high as pure copper, it can still conduct electricity well enough for many electrical - related applications where corrosion resistance is a priority

3. Mechanical Properties

Property	C44300/ CZ111/ C4430/ CuZn28Sn1
Tensile Strength (MPa)	Generally in the range of 300 - 400 MPa (depending on temper). For example, in the annealed state, it may have a lower value, around 300 MPa, while in the hard - drawn state, it can reach up to 400 MPa or more
Yield Strength (MPa)	Usually around 120 - 200 MPa (again, depending on temper). The yield strength increases with cold working processes
Elongation (%)	Good elongation, with values typically ranging from 20 - 40% in the annealed condition. Cold working reduces the elongation but increases the strength
Hardness	In the annealed state, the hardness is relatively low, around 60 - 80 HV (Vickers Hardness). After cold working, it can increase to 120 - 150 HV or more

4. Corrosion Resistance

• Seawater Corrosion Resistance: C44300/ CZ111/ C4430/ CuZn28Sn1 copper tubes have excellent corrosion resistance in seawater. The tin - containing alloy forms a protective film on the surface in seawater, which effectively resists the corrosive effects of chloride ions and other substances in seawater. This makes it a popular choice for seawater - related applications.

• Resistance to Chemical Media: They are also resistant to many organic compounds, some acidic solutions (especially non - oxidizing acids), and alkaline solutions. However, in strong oxidizing acid environments, the corrosion resistance may be significantly reduced.

5. Applications

Application Area	Specific Applications
Marine Industry	- Seawater piping systems in ships, offshore platforms, and desalination plants. The excellent seawater corrosion resistance ensures the long - term operation of these systems. - Marine heat exchangers, where the combination of good heat transfer and corrosion resistance is crucial for efficient operation
Plumbing and Heating Systems	- Used in water supply pipes in buildings, especially in areas where water quality may be corrosive. The alloy's corrosion resistance helps prevent pipe leakage and ensures a long service life. - In some heating systems, these copper tubes can be used for heat transfer and distribution due to their good thermal conductivity and corrosion resistance
Industrial Applications	- In chemical plants, they can be used for transporting non - aggressive chemical fluids. Their corrosion resistance to a wide range of chemicals makes them suitable for such applications. - In some food and beverage industries, where the transported substances may have a certain corrosive effect, these copper tubes can be used to ensure the integrity of the transportation system and the quality of the products

6. Comparison with Other Copper Alloys

• Cost: Compared to some high - performance copper - nickel alloys like C71500, C44300/ CZ111/ C4430/ CuZn28Sn1 is generally more cost - effective. However, it may be more expensive than some simple copper - zinc alloys due to the addition of tin and the associated refining processes.

• Performance in Different Environments: In seawater environments, it performs well in terms of corrosion resistance, similar to some copper - nickel alloys but at a lower cost. In non - corrosive or mildly corrosive environments, it may offer a better balance between performance and cost compared to more expensive alloys. In highly oxidizing environments, its performance is inferior to some specialized alloys designed for such conditions.

• Formability: It has good formability and can be easily processed into various shapes through common metal - forming methods such as bending, rolling, and extrusion. This makes it suitable for applications that require complex - shaped components.

7. Conclusion

C44300/ CZ111/ C4430/ CuZn28Sn1 copper tubes are versatile materials with a combination of good mechanical properties, excellent corrosion resistance, and reasonable cost. Their wide range of applications in marine, plumbing, heating, and industrial sectors demonstrates their importance in various industries. When choosing this material, factors such as the specific application environment, cost constraints, and required mechanical properties need to be carefully considered to ensure the optimal use of this alloy.

 

 

 

ASTM Standards:

• B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing.
• B154 Test Method for Mercurous Nitrate Test for Copper and Copper Alloys.
• B170 Specification for Oxygen-Free Electrolytic Copper Refinery Shapes.
• B224 Classification of Coppers.
• B846 Terminology for Copper and Copper Alloys.
• B858 Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys.
• E8 Test Methods for Tension Testing of Metallic Materials E 8M Test Methods for Tension Testing of Metallic Materials [Metric].
• E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications.
• E53 Test Methods for Determination of Copper in Unalloyed Coppers by Gravimetry.
• E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes.
• E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods.
• E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys.
• E76 Test Methods for Chemical Analysis of Nickel-Copper Alloys.
• E112 Test Methods for Determining Average Grain Size E 243 Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes.
• E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition.
• E478 Test Methods for Chemical Analysis of Copper Alloys.
• E527 Practice for Numbering Metals and Alloys (UNS).

Chemical Composition:

Designation	Chemical Composition %
	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
C44300	70.0-73.0	0.9-1.2	-	0.02-0.06	-	0.06 max	-	0.07	Rem
C68700	76.0-79.0	-	1.8-2.5	0.02-0.06	-	0.06 max	-	0.07	Rem
C70400	Rem	-	-	-	4.8-6.2	1.3-1.7	0.3-0.8	0.05	1.0max
C70600	Rem	-	-	-	9.0-11.0	1.0-1.8	1.0max	0.05	1.0max
C71500	Rem	-	-	-	29.0-33.0	0.4-1.0	1.0max	0.05	1.0max
C71640	Rem	-	-	-	29.0-32.0	1.7-2.3	1.5-2.5	0.05	1.0max

 

The world standard Grade equivalent to ASTM B111

Material Designation	Corresponding Material Symbol
	GB/T8890	ASTM B111	BS2871	JIS H3300	DIN1785
Copper-Nickel	BFe10-1-1	C70600	CN102	C7060	CuNi10Fe1Mn
	BFe30-1-1	C71500	CN107	C7150	CuNi30Mn1Fe
	(BFe30-2-2)	C71640	CN108	C7164	CuNi30Fe2Mn2
	(BFe5-1.5-0.5)	C70400	-	-	-
	B7	-	-	-	-
Aluminums Brass	HAL77-2	C68700	CZ110	C6870	CuZn20Al2
Admiralty Brass	HSn70-1	C44300	CZ111	C4430	CuZn28Sn1
Boric Brass	Hsn70-18	-	-	-	-
	HSn70-1 AB	-	-	-	-
Arsenical Brass	H68A	-	CZ126	-	-
Brass Tube	H65/H63	C28000/C27200	CZ108	C2800/C2700	CuZn36/CuZn37

Tensile Requirements

Copper or Copper Alloy UNS NO.	Temper Designation		Tensile Strength	Yield Strength
	Standard	Former	min ksi	min ksi
C44300	O61	annealed	45	15
C68700	O61	annealed	50	18
C70400	H55	light-drawn	38	30
C70600	H55	light-drawn	45	15
C71500	O61	annealed	52	18
C71640	O61	annealed	63	25

 

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.

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.

 

Detailed Photos

 

 

 

Processing of Production