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{"title":"ASTM A861 GR.2 Titanium Alloy Seamless Pipe For Boiler Condenser Electric","imgUrl":"https:\/\/img.chinax.com\/nimg\/17\/1d\/72557b066113e01905b80450c734-200x200-1\/astm_a861_gr_2_titanium_alloy_seamless_pipe_for_boiler_condenser_electric_appliance.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"ASTM A861 Gr.2","Certification":"ISO,SGS,BV,ISO & SGS,ISO\/CE\/SGS","Place of Origin":"CHINA"}}
{"title":"ASME SB338 GR.7 \/ UNS R52400 Titanium Alloy Seamless Heat Exchanger Tube","imgUrl":"https:\/\/img.chinax.com\/nimg\/57\/cb\/013fcba50a7d7b427fbe8ef70a11-200x200-1\/asme_sb338_gr_7_2f_uns_r52400_titanium_alloy_seamless_heat_exchanger_tube.jpg","attrs":{"Brand Name":"YUHONG","Model Number":"ASME SB338 Gr.7 Seamless Tube","Certification":"ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015","Place of Origin":"China"}}
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
50
345
18
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
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
