ASTM B111 Copper Heat Exchanger Tube

These tube forms are widely used in condenser and heat exchanger fabrication systems. 

Product Form	Description	Typical Applications
Seamless Tubes	Standard ASTM B111 seamless tubes with excellent heat transfer and corrosion resistance.	Condensers, shell & tube heat exchangers, chillers
Finned Tubes	Enhanced surface area for improved heat transfer efficiency and reduced equipment size.	Air coolers, HVAC systems, refrigeration equipment
U-Bend Tubes	Precision bent tubes designed for compact shell-and-tube heat exchangers.	Power plants, petrochemical and refinery heat exchangers
Tube Bundles	Pre-assembled tube bundles for new installations or retubing projects.	Surface condensers, marine and industrial heat exchangers

Alloy / Grade	Common Name	Primary Application Profile	Factory Processing Advantage
ASTM B111 C12200	DHP Copper	Standard commercial heat exchanger hvac and clean water chillers.	Maximum thermal conductivity; excellent for brazing.
ASTM B111 C44300	Admiralty Brass	River water and brackish fluid cooling systems.	Formulated with inhibitors to prevent severe dezincification.
ASTM B111 C68700	Aluminum Brass	High-velocity shell tube evaporator designs (SB111 C68700).	Exceptional resistance to impingement attack and erosion.
ASTM B111 C70600	CuNi 90/10	Marine condensers, offshore platforms, ship building.	The globally trusted C70600 tube for seawater bio-fouling resistance.
ASTM B111 C71500	CuNi 70/30	Severe marine duties and high-pressure desalinization.	A premium C71500 tube offering the highest mechanical strength among standard copper alloys.

 

Selecting the right ASTM B111 copper alloy is critical for heat exchanger performance, corrosion resistance, and service life. Different operating environments such as freshwater, seawater, or high-velocity cooling systems require different material choices.

Service Environment	Recommended Alloy	Key Characteristics	Typical Applications
Freshwater systems	C12200	Highest thermal conductivity, excellent heat transfer efficiency	HVAC coils, freshwater condensers
General industrial cooling water	C44300	Balanced corrosion resistance and cost-performance	Industrial heat exchangers, utility cooling systems
Seawater (moderate conditions)	C68700	Good resistance to seawater corrosion and biofouling	Power plant condensers, desalination pre-cooling
Marine & shipbuilding systems	C70600	Stable performance in continuous seawater exposure	Shipboard heat exchangers, marine coolers
High-velocity seawater systems	C71500	Superior resistance to erosion-corrosion	Offshore platforms, high-speed seawater condensers
Severe offshore environments	C71500	Long-term durability under aggressive chloride exposure	Oil & gas offshore cooling systems

C12200 (Phosphorus Deoxidized Copper)

Best choice when thermal conductivity is the top priority

Not suitable for seawater service

Common in HVAC and freshwater heat exchange systems

Often used where high efficiency and clean heat transfer are required

 

C44300 (Admiralty Brass)

Cost-effective solution for mild corrosion environments

Suitable for industrial cooling water with controlled chemistry

Performs well in non-aggressive water systems

Widely used in general-purpose condensers

 

C68700 (Aluminum Brass)

Designed for seawater applications with moderate flow conditions

Offers improved resistance to dezincification and corrosion

Commonly used in power plants and desalination systems

Preferred when balancing performance and cost in marine environments

 

C70600 (90/10 Copper Nickel)

Excellent resistance to seawater corrosion and biofouling

Suitable for continuous marine service and shipboard systems

Stable mechanical performance over long service cycles

Widely adopted in marine engineering projects

 

C71500 (70/30 Copper Nickel)

Highest corrosion and erosion resistance among B111 copper-nickel alloys

Ideal for high-velocity seawater and offshore environments

Performs well under severe mechanical and chemical stress

Preferred for long-life critical marine installations

Not sure which alloy? Get Engineering Support

 

Parameter	Standard Range / Specification
Outside Diameter (OD)	5 mm – 280 mm (approx. 3/16" – 11")
Wall Thickness	0.3 mm – 10 mm
Length	Up to 18,000 mm (18 m) or cut-to-length as required
Tube Types	Seamless straight tubes / U-bend tubes
Temper	Annealed / Light drawn / As required by application
Diameter Tolerance	According to ASTM B111 standard (varies by OD size)
Wall Thickness Tolerance	Typically ±10% (depending on size and alloy)
Length Tolerance	+6 mm / -0 mm (or as specified)
Straightness	Controlled per ASTM requirements for heat exchanger installation
End Finish	Plain / Beveled / Square cut / Deburred

 

Alloy (UNS)	Copper (Cu) %	Nickel (Ni) %	Zinc (Zn) %	Tin (Sn) %	Aluminum (Al) %	Iron (Fe) %	Phosphorus (P) / Others
C12200	≥ 99.9	-	-	-	-	-	P: 0.015–0.040
C44300	70.0–73.0	-	Balance	0.9–1.2	-	-	As: 0.02–0.06
C68700	76.0–79.0	-	Balance	-	1.8–2.5	≤0.06	As: 0.02–0.10
C70600	88.6–91.0	9.0–11.0	-	-	-	1.0–1.8	Mn ≤1.0
C71500	65.0–68.0	29.0–33.0	-	-	-	0.4–1.0	Mn ≤1.0

 

Mechanical properties ensure tube performance under pressure, temperature, and vibration conditions. 

Alloy (UNS)	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (Typical)
C12200	≥ 220	≥ 70	≥ 40	HV 50–70
C44300	310 – 380	≥ 105	≥ 45	HV 70–90
C68700	350 – 420	≥ 125	≥ 40	HV 80–100
C70600	300 – 370	≥ 105	≥ 30	HV 70–95
C71500	360 – 450	≥ 125	≥ 35	HV 85–110

 

Alloy (UNS)	Density (g/cm³)	Thermal Conductivity (W/m·K)	Electrical Conductivity (% IACS)	Melting Range (°C)	Corrosion Resistance (Seawater)
C12200	8.94	330–360	≥ 90	1083	Excellent (freshwater service)
C44300	8.53	100–120	20–25	900–940	Good (mild seawater / brackish water)
C68700	8.20	120–150	25–30	900–930	Very Good (seawater with velocity control)
C70600	8.90	45–60	5–10	1100–1140	Excellent (marine service)
C71500	8.94	35–50	4–8	1150–1180	Excellent (high velocity seawater)

 

This ensures consistent quality, dimensional accuracy, and long-term service reliability.

 

Surface Finish	Description	Typical Benefits / Applications
Mill Finish	Standard as-produced surface directly from drawing and annealing process.	General industrial heat exchangers, standard condenser service
Bright Annealed (BA)	Clean, smooth, bright surface produced in controlled atmosphere annealing.	HVAC systems, refrigeration, high-efficiency heat transfer
Pickled & Cleaned	Acid-cleaned surface to remove oxides and scale for improved corrosion resistance.	Marine condensers, seawater service, desalination plants
Polished Finish	Mechanically polished surface with reduced roughness for improved flow characteristics.	High-performance heat exchangers, low fouling systems
Protective Coating	Temporary anti-corrosion coating applied for storage and export protection.	Long-distance shipping, offshore projects, inventory storage

 

A copper tube heat exchanger calculation involves several variables. While we do not design your system, we provide engineering support to help you determine the correct ASTM B111 copper heat exchanger tube specifications.

 

Key inputs for heat exchanger design:

heat duty (kW or BTU/hr)

inlet and outlet temperatures (hot and cold sides)

flow rates (tube side and shell side)

allowable pressure drop

fouling factors

 

Outputs that determine tube selection:

required heat transfer surface area (square meters)

number of tubes

copper heat exchanger tube od and wall thickness

copper heat exchanger tube length

tube pitch (center-to-center distance between tubes)

 

For a shell and tube heat exchanger with a u tube bundle, the bend radius also affects tube count and shell diameter.

If you have a preliminary process specification, send it to our engineering team. We will recommend the most cost-effective ASTM B111 alloy and size for your duty.

Send Your Process Data → Get Free Tube Sizing Recommendation

Test Item	Standard / Method	Purpose
Chemical Analysis	ASTM E478 / Spectrographic analysis	Verify alloy composition and trace elements
Tensile Test	ASTM E8/E8M	Confirm tensile strength, yield strength, and elongation
Flattening Test	ASTM B111	Check ductility and resistance to cracking under deformation
Flanging (Flare) Test	ASTM B111	Evaluate tube forming performance at ends
Eddy Current Test (ECT)	ASTM E243	Detect surface and near-surface defects in tubes
Hydrostatic Test	ASTM B111 / ASTM E1003	Verify pressure integrity and leak resistance
Dimensional Inspection	Calipers / micrometers	Ensure OD, wall thickness, and length compliance
Visual Inspection	ASTM B111	Check surface defects, scratches, dents, and oxidation
Hardness Test	ASTM E18	Confirm material hardness consistency
PMI Test (Positive Material Identification)	OES / XRF	Verify alloy grade accuracy before shipment

Packaging Stage	Material / Method	Purpose
Individual Tube Protection	Anti-rust VCI paper + plastic end caps	Prevents moisture, dust, and scratches on copper tube heat exchanger inner surfaces.
Bundling	Nylon straps + wooden spacers	Keeps copper heat exchanger tube OD 19mm, 1 inch, or 5/8 inch sizes organized and vibration-free.
Moisture Barrier	Thick PE film wrap (heat-shrunk)	Blocks humidity during long sea voyages to copper heat exchanger tube Germany or Saudi Arabia.
Outer Packing	Export-grade plywood cases or steel-banded wooden crates	Withstands stacking and rough handling. Each crate labeled with PO number, alloy (e.g., SB111 C70600), and quantity.
Documentation	Packing list + Mill Test Certificate (MTC) attached outside	Customs clearance support for copper heat exchanger tube stockist and distributor partners.

For U-Bundle Orders: U tube heat exchanger and U tube bundle heat exchanger are placed in dedicated steel jigs inside the crate to prevent bending radius distortion.

 

 

Equipment Type	Specification / Capability	Quality Impact
Horizontal Continuous Casting Line	10-ton capacity	Produces homogeneous copper alloy tube for heat exchanger billets with zero porosity.
Three-Roll Piercing Mill	Up to 60mm OD	Precision wall thickness control for heat exchanger tube wall thickness as low as 0.5mm.
Cold Drawing Bench	5 draws in sequence	Achieves tight tolerances on copper heat exchanger tube length and heat exchanger pipe diameter.
Straightening & Cutting Line	CNC servo-controlled	Burr-free cutting for copper heat exchanger tube 3/4 inch and 1 inch to exact project lengths.
U-Bending Machine	CNC mandrel type	Produces u tube condenser and U tube bundle heat exchanger without kinking or ovality.
Eddy Current Tester	NDT (Non-Destructive Testing)	100% inspection of C70600 tube and C71500 tube for pinholes or cracks per ASTM B111 pdf standards.
Hydrostatic Tester	Up to 200 bar	Validates heat exchanger tube expansion and tube rolling integrity.
Spectrometer	Optical emission (OES)	Confirms chemical composition of ASME SB111, EN 12451, and JIS H3300 grades on every batch.

 

Our Certifications & Compliance:

ASTM B111 pdf and ASME SB111 pdf full traceability.

ISO 9001:2015 quality management system.

Third-party inspection accepted: SGS, BV, Lloyds, or TUV.

Copper heat exchanger tube life expectancy testing reports available upon request.

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Q1: What is the difference between ASTM B111 and ASME SB111?

ASTM B111 is the material specification. ASME SB111 is identical in technical requirements but is listed in the ASME Boiler and Pressure Vessel Code. For heat exchanger boiler applications that require ASME stamping, you need ASME SB111 pdf certification. We provide both.

 

Q2: How do I get a copper heat exchanger tube price per meter?

Copper heat exchanger tube cost per meter depends on alloy, OD, wall thickness, length, and quantity. C12200 is the lowest cost. C70600 is approximately 2x the price of C12200. C71500 is approximately 3x the price. Send us your specification for a firm copper heat exchanger tube price.

 

Q4: How long do ASTM B111 copper heat exchanger tubes last?

Copper heat exchanger tube life expectancy ranges from 15 years (C12200 in aggressive cooling water) to 30+ years (C71500 in clean seawater). Water chemistry, velocity, temperature, and maintenance practices significantly affect actual life.

 

Q5: Can I weld ASTM B111 C12200 tubes?

For how to weld copper heat exchanger tube, the short answer is that brazing is preferred over welding. Use BCuP-5 filler rod and a neutral flame. Welding requires deoxidized filler and argon purge. For how to bend copper heat exchanger tube in the field, we advise against it – factory bending maintains proper wall thickness.

 

Q6: How to clean copper heat exchanger tube without damaging it?

How to clean copper heat exchanger tube depends on the fouling type. For scale, use inhibited citric acid or sulfamic acid. Never use hydrochloric acid. For biological fouling, use chlorine dioxide or mechanical cleaning with nylon brushes. Avoid steel brushes which scratch the tube surface.

 

Q1: What is a copper heat exchanger tube and why use it over other metals?
A: It is a seamless pipe designed for optimal thermal transfer. We use copper because its thermal conductivity is unparalleled, drastically reducing the required surface area compared to steel. This allows engineers to design highly compact systems.

 

Q2: Copper heat exchanger tube vs stainless steel: Which is better for my project?
A: Copper transfers heat up to 20 times faster than stainless steel and naturally resists marine bio-fouling. However, stainless steel is preferred if your system contains highly corrosive chemicals like strong acids or ammonia.

 

Q3: Copper heat exchanger tube vs cupronickel: How do I choose?
A: Standard copper (C12200) is perfect for clean freshwater. If your equipment uses seawater, you must upgrade to cupronickel (ASTM B111 C70600 or C71500). The addition of nickel and iron drastically improves erosion-corrosion resistance in high-velocity saltwater.

 

Q5: How to bend or weld copper heat exchanger tube without damaging it?
A: For a U-tube bundle, we use CNC rotary draw bending with internal mandrels to prevent the tube from flattening. After bending, the stress must be relieved via annealing. If you need to know how to weld copper heat exchanger tube to a tube sheet, TIG welding is standard for cupronickel, while brazing is common for pure copper. Proper control of heat is vital to prevent copper heat exchanger tube corrosion at the weld seam.