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ASTM B111 C68700 Seamless Copper Alloy Tubes High Thermal Conductivity Corrosion Resistance for Heat Exchangers Boilers

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ASTM B111 C68700 Seamless Copper Alloy Tubes High Thermal Conductivity Corrosion Resistance for Heat Exchangers Boilers

Brand Name:	YUHONG
Model Number:	ASTM B111 C68700
MOQ:	500KG
Price:	AS PER DETIALS
Packaging Details:	Plywooden case with Iron Frame
Payment Terms:	T/T,L/C

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

ISO 9001

Supply Ability:

4150 Ton Per Month

Highlight:

Corrosion Resistance Seamless Copper Alloy Tubes

Heat Exchangers Seamless Copper Alloy Tubes

Boilers Seamless Copper Alloy Tubes

Product Description

ASTM B111 C68700 Seamless Copper Alloy Tubes

Cold-Drawn Precision Tubes for Efficient Heat Transfer Systems

Material & Performance Highlights

C68700 (Aluminum Brass, UNS C68700) is a copper-zinc alloy renowned for superior thermal conductivity, excellent seawater corrosion resistance, and biofouling inhibition. Ideal for condensers, marine heat exchangers, and boiler feedwater heaters.

Key Specifications

Property	Value
Standards	ASTM B111, ASME SB111, EN 12451
Outer Diameter	10mm - 150mm (Custom Sizes Available)
Wall Thickness	1mm - 15mm
Surface Finish	Cold-Drawn, Annealed, Polished

Mechanical Properties

Property	Minimum Value
Tensile Strength	380 MPa
Yield Strength(0.2%)	140 MPa
Elongation (%)	45%
Hardness (Rockwell B)	≤ 65 HRB

Chemical Composition (%)

Element	Cu	Zn	Al	As
C68700	76.0-79.0	Bal.	1.8-2.3	0.02-0.10

Manufacturing Process

Material Sourcing: High-purity copper billets from ISO 9001-certified suppliers.
Cold Drawing: Achieves tight tolerances (±0.1mm) and smooth internal surfaces.
Annealing: Controlled atmosphere annealing at 450°C - 550°C for ductility.
Quality Assurance: 100% Eddy Current Testing (ECT) and hydrostatic pressure tests.

Applications

✅ Power Plant Condenser Tubes
✅ Marine Heat Exchangers & Desalination Systems
✅ Refinery Cooling Towers
✅ HVAC Chiller Tubes

Why Choose YUHONG's C68700 Tubes?

55 Production Lines: Guaranteed 12-day lead time for standard sizes.
Anti-Biofouling Design: Arsenic-doped alloy prevents microbial growth in seawater.
Certifications: EN 10204 3.2, KOSHA, and PED 2014/68/EU compliant.

FAQ

Q: How does C68700 compare to Admiralty Brass (C44300)?

A: C68700 offers 20% higher thermal conductivity and better resistance to dezincification.

Q: Maximum operating temperature in marine environments?

A: 220°C (428°F) with proper water treatment.

Q: Can you supply tubes with internal epoxy coating?

A: Yes - Custom coatings available upon request.

About YUHONG Holding Group

As a Top 5 Chinese Finned Tube Exporter with 20+ years of global expertise, YUHONG delivers excellence through:

55 Advanced Lines: Specializing in finned tubes, copper alloy tubes, and seamless boiler tubes.
20,000㎡ Facility: Equipped with automated cold-drawing mills and robotic polishing systems.
Global Reach: Serving 80+ countries with ISO 9001 and API 5CT certifications.

Discover our full portfolio at www.steelfintube.com or contact jimmy@steelseamlesspipe.com for tailored solutions.

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Fin Tube Support

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Super Duplex Stainless Steel Heat Exchanger Tube

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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