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ASME SB111 C68700 Arsenical Aluminum Brass U Bend Seamless Tube With Impingement Attack

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ASME SB111 C68700 Arsenical Aluminum Brass U Bend Seamless Tube With Impingement Attack

Brand Name:	YUHONG
Model Number:	ASME SB111 C68700
MOQ:	500KGS
Price:	Negotiable
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Payment Terms:	L/C,T/T

Detail Information

Product Description

Detail Information

Place of Origin:

China

Certification:

ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015

Product Name:

U Bend Seamless Tube

Specification&Material:

ASME SB111 C68700

Code:

Surface:

Polished

Type:

Seamless

Application:

Heat Exchanger, Condencer, Evaporator...

Supply Ability:

Accdording to customer's request

Highlight:

ASME SB111 C68700 brass U bend tube

arsenical aluminum brass seamless tube

copper alloy heat exchanger tube

Product Description

YUHONG brand goods have been already exported to more than 85 countries With more than 35 years' experience, because of strict quality control policy, excellent sales service, delivery on time. YUHONG won more and more new clients and got more and more repeat orders from old clients, in YUHONG People's mind: Quality is First Important!

ASME SB111 C68700 Arsenical Aluminum Brass U Bend Seamless Tube With Impingement Attack

ASME SB111 C68700 Arsenical Aluminum Brass U Bend Seamless Tube is a seamless tube manufactured from C68700 arsenical aluminum brass in compliance with ASME SB111 standard. It is produced by seamless cold‑drawn or hot‑extruded process followed by U‑bending. The material contains copper, zinc, aluminum, and a trace amount of arsenic, offering excellent resistance to seawater corrosion, impingement attack, and dezincification. This U‑bend seamless tube is widely used in heat exchangers, condensers, and tube bundles for marine, power plant, and desalination applications.

UNS/ASTM	DIN	GB	BS	JIS	ISO	GOST
C68700	CuZn20Al2	HAl77-2	CZ110	C6870	CuZn20Al2	ЛAМЦ77-2-0.05

1.Chemical & Mechanical Properties

ASME SB111 C68700 Chemical Composition (%)
Cu	Al	Pb	Fe	Zn	As
76.0-79.0	1.8-2.5	≤ 0.07	≤ 0.06%	REM	0.02-0.06

Mechanical Properties

Temper Designation

Annealingtemperature, ℃

Tensile Strength, min

Yield Strength, min

Hardness

Vickers

Code

Name

＞650

ksi

Mpa

ksi

Mpa

≤150

O61

Annealed

345

125

2. Key Advantages

Aluminum forms a dense protective film of aluminum oxide on the surface, which can resist the erosion of seawater and brackish water for a long time.
It is particularly suitable for high-flow-rate cooling water environments, and can effectively avoid pipe wall thinning or perforation caused by high-speed fluid impact.
Adding trace amounts of arsenic (As) inhibits the selective dissolution of zinc in brass, preventing the formation of a loose copper skeleton and the risk of leakage.
With a thermal conductivity of approximately 100–121 W/(m·K), significantly higher than that of stainless steel, it can effectively improve the heat exchange efficiency of heat exchangers.
Suitable for alternating temperature or pressure conditions, reducing the risk of cracking failure during long-term operation.
It outperforms ordinary brass, and its corrosion resistance life is close to that of higher-cost copper-nickel alloys or stainless steel, but its price is much lower.

3. Key Applications

Shipbuilding and Marine Engineering: Used in seawater cooling systems, condensers, and heat exchangers.
Thermal and Nuclear Power Generation: Used in heat exchange equipment such as water heaters and oil coolers in coastal power plants.
Seawater Desalination: Widely used in multi-stage flash evaporation, reverse osmosis, and other seawater desalination equipment.
Petrochemical Industry: Used in process pipelines for treating salty or other corrosive media.

4. Test

Mechanical Testing: Tensile test, Hardness Test, Flattening Test, Flaring Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Intergranular Corrosion (IGC) Test

*Mechanical Testing

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Stainless Steel Boiler Tube

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Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube