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ASTM B111 C68700 / CuZn20Al2 / CW307G Aluminium Brass Copper Alloy Tube

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ASTM B111 C68700 / CuZn20Al2 / CW307G Aluminium Brass Copper Alloy Tube

Country/Region	china
City & Province	ningbo zhejiang

Product Details

UNS C68700 / CuZn20Al2 / CW307G Aluminum Brass Copper Alloy Tube Heat Exchanger Tube

UNS C68700 is a copper-zinc alloy known as Aluminum Brass. It is commonly used in marine environments due to its excellent corrosion resistance and high strength. However, it does not have exact equivalent grade since different countries and standards may use different numbering systems.

The advantages of ASTM B111 C68700 copper alloy tube

1. Excellent corrosion resistance: The C68700 alloy used in these tubes offers exceptional resistance to corrosion, making them suitable for applications in harsh environments. They can withstand exposure to seawater, brackish water, and various industrial chemicals without significant degradation.

2. High thermal conductivity: B111 C68700 tubes exhibit excellent thermal conductivity, allowing efficient heat transfer. This property makes them ideal for applications that require effective heat exchange, such as heat exchangers, condensers, and evaporators.

3. Good formability and weldability: These tubes can be easily formed into different shapes and sizes, making them versatile for various fabrication processes. Additionally, they have good weldability, enabling easy joining with other components or fittings.

COUNTRY	STANDARD	NAME
ASTM	ASTM B111	Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
GB/T	GB/T8890	Seamless Copper Alloy Heat Exchanger Tubes
BS	BS 2871 CZ110	Copper and Copper Alloys Tubes
JIS	JIS H3300	Copper and Copper Alloy-Seamless Pipes and Tubes
DIN	DIN1785	Wrought Copper and Copper Alloy Tubes for Condensers and Heat Exchangers

ASTM B111 C68700 Copper Alloy Mechanical Properties

Copper or Copper Alloy UNS No.	Temper Designation		Annealing temperature, °C	Tensile Strength, minYield Strength, min		Yield Strength, min		HV
	Code	Surface	Annealing temperature, °C	Ksi	Mpa	Ksi	Mpa	HV
C68700	O61	Annealed	above 650	50	345	18	125	150

Chemical Compositions%
UNS No.	CopperA	Tin	Al	Nickel, incl Cobalt	Lead, max	Iron	Zinc	Mn.	Arsenic	Antimony	Phosphorus	Chro mium	Others
C10200	99.95 min	-	-	-	-	-	-	-	-	-	-	-	-
C12000	99.90 min	-	-	-	-	-	-	-	-	-	0.004-0.012	-	-
C12200	99.9 min	-	-	-	-	-	-	-	-	-	0.015-0.040	-	-
C14200	99.40 min	-	-	-	-	-	-	-	0.15-0.50	-	0.015-0.040	-	-
C19200	98.7 min	-	-	-	-	0.8-1.2	-	-	0.15-0.50	-	0.01-0.04	-	-
C23000	84.0-86.0	-	-	-	0.05	0.05 max	remalnder	-	-	-	-	-	-
C28000	59.0-63.0	-	-	-	0.30	0.07 max	remainder	-	-	-	-	-	-
C44300	70.0-73.0	0.9-1.2	-	-	0.07	0.06 max	remainder	-	0.02-0.06	-	-	-	-
C44400	70.0-73.0	0.9-1.2	-	-	0.07	0.06 max	remainder	-	-	0.02-0.10	-	-	-
C44500	70.0-73.0	0.9-1.2	-	-	0.07	0.06 max	remainder	-	-	-	0.02-0.10	-	-
C60800	remainder	-	5.0-6.5	-	0.10	0.10 max	-	-	0.02-0.35	-	-	-	-
C68700	76.0-79.0	-	1.8-2.5	-	0.07	0.06 max	remainder	-	0.02-0.10	-	-	-	-
C70400	remainder	-		4.8-6.2	0.05	1.3-1.7	1.0max	0.30-0.8	-	-	-	-	-
C70600	remainder	-		9.0-11.0	0.05^B	1.0-1.8	1.0max^B	1.0max	-	-	^B	-	^B
C71000	remainder	-		19.0-23.0	0.05^B	0.50-1.0	1.0max^B	1.0max	-	-	^B	-	^B
C71500	remainder	-		29.0-33.0	0.05^B	0.40-1.0	1.0max^B	1.0max	-	-	^B	-	^B
C71640	remainder	-		29.0-32.0	0.05^B	1.7-2.3	1.0max^B	1.5-2.5	-	-	^B	-	^B
C72200	remainder	-		15.0-18.0	0.05^B	0.50-1.0	1.0max^B	1.0max	-	-	^B	0.30 -0.70	^B