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ASTM B111 UNS C44300 Admiralty Brass Tube CuZn28Sn1 Copper Alloy Heat Exchanger Tube for Condensers

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ASTM B111 UNS C44300 Admiralty Brass Tube CuZn28Sn1 Copper Alloy Heat Exchanger Tube for Condensers

Brand Name:	YUHONG
Model Number:	ASTM B111 UNS C44300 Seamless Brass Tube
MOQ:	500kgs
Price:	NEGOTIABLE
Packaging Details:	Ply-wooden Case, Bundle with plastic Cap
Payment Terms:	L/C,T/T

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Production Name:

Heat Exchanger Tube

Standard:

ASTM B111, ASME SB111

Material:

UNS C44300 , CuZn28Sn1

OD:

1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", Etc.

WT:

BWG 25, 22, 20, 18 ... 10

Length:

Single Random, Double Random & Cut Length

Tube End:

Plain End, Beveled End

Process:

Cold Drawn

Application:

Boiler, Heat Exchanger, Oil And Gas Plant, Cooling, Condenser

Highlight:

ASTM B111 UNS C44300 Admiralty Brass Tube, CuZn20Al2 Heat Exchanger Tubee

Product Description

ASTM B111 UNS C44300 Admiralty Brass Heat Exchanger Tube

ASTM B111 UNS C44300 (CuZn28Sn1) cold drawn seamless Admiralty brass tube is a copper-zinc alloy heat exchanger tube supplied in the O61 annealed temper, manufactured to ASTM B111 / ASME SB111 with an arsenic-inhibited chemistry of roughly 70% Cu, 28% Zn, 1% Sn and 0.02–0.06% As. It is the workhorse tube grade for shell-and-tube heat exchangers, surface condensers, marine coolers and freshwater generators where the cooling medium is fresh, brackish or low-chloride water.

The problem it solves is specific: ordinary brass tubes fail by dezincification — zinc is selectively leached out of the wall, leaving a porous copper plug that leaks without warning. The combined tin + arsenic addition in C44300 suppresses that mechanism, so tubes hold pressure for years in water chemistry that would destroy plain 65/35 brass. For buyers, the practical differentiators are: cold drawn wall thickness control across BWG 25 down to BWG 10, an O61 annealed structure that survives U-bending and tube-sheet rolling without cracking, full EN 10204 3.1 mill test certification, and third-party inspection on request.

Technical Snapshot at a Glance

Material grade	ASTM B111 UNS C44300 (CuZn28Sn1), arsenic inhibited Admiralty brass
Product type	Cold drawn seamless heat exchanger tube (Condenser / Admiralty Brass Tube)
Standard	ASTM B111, ASME SB111; equivalent HSn70-1 / CZ111 / C4430 / CuZn28Sn1
Temper	O61 annealed (45 ksi min tensile, 15 ksi min yield)
Outside diameter	1/4", 3/8", 1/2", 5/8", 3/4", 1", 1.1/4" and intermediate sizes
Wall thickness	BWG 25, 22, 20, 18, 16, 14, 12, 10
Length range	Single random, double random and exact cut length
Tube ends	Plain end, beveled end
Typical service	Condenser, heat exchanger, boiler, cooling water, oil & gas plant

Where C44300 Fits — and Where It Does Not

Service condition	C44300 Admiralty Brass	Engineering note
Fresh water, brackish water, clean seawater	Recommended	Primary design case for this grade
Chloride content up to approx. 500 mg/l	Acceptable	Confirm with water analysis before order
Water velocity 1.5–2.5 m/s	Recommended	Below 1.0 m/s fouling risk rises; above 2.5 m/s erosion-corrosion risk rises
Design temperature up to 60 °C	Recommended	Above 60 °C move to CuNi 90/10 or 70/30
Polluted water, sulphide, ammonia, high velocity > 3 m/s	Not recommended	Specify C70600 / C71500 or titanium
Steam contact, superheated service	Not recommended	Select stainless or CuNi grade instead

Working Conditions & Material Comparison--Equivalent Grades of Copper Alloy Heat Exchanger Tube

Material Designation	GB/T8890	ASTM B111	BS2871	JIS H3300	DIN1785
Copper-Nickel	BFe10-1-1	C70600	CN102	C7060	CuNi10Fe1Mn
Copper-Nickel	BFe30-1-1	C71500	CN107	C7150	CuNi30Mn1Fe
Copper-Nickel	(BFe30-2-2)	C71640	CN108	C7164	CuNi30Fe2Mn2
Aluminum Brass	HAL77-2	C68700	CZ110	C6870	CuZn20Al2
Admiralty Brass	HSn70-1	C44300	CZ111	C4430	CuZn28Sn1
Brass Tube	H65 / H63	C28000 / C27200	CZ108	C2800 / C2700	CuZn36 / CuZn37

Chemical Composition of the Alloy Family

Designation	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
C44300	70.0–73.0	0.9–1.2	-	0.02–0.06	-	0.06 max	-	0.07	Rem
C68700	76.0–79.0	-	1.8–2.5	0.02–0.06	-	0.06 max	-	0.07	Rem
C70600	Rem	-	-	-	9.0–11.0	1.0–1.8	1.0 max	0.05	1.0 max
C71500	Rem	-	-	-	29.0–33.0	0.4–1.0	1.0 max	0.05	1.0 max
C71640	Rem	-	-	-	29.0–32.0	1.7–2.3	1.5–2.5	0.05	1.0 max

Tensile Requirements

Copper or Copper Alloy UNS No.	Temper Designation (Standard)	Temper Designation (Former)	Tensile Strength, min ksi	Yield Strength, min ksi
C44300	O61	annealed	45	15
C68700	O61	annealed	50	18
C70600	H55	light-drawn	45	15
C71500	O61	annealed	52	18
C71640	O61	annealed	63	25

Quick Selection Guide by Water Chemistry

Choose C68700 when:

Clean seawater or brackish water (open ocean quality)
Moderate velocities (1.5–2.5 m/s)
Temperatures < 60°C
Good filtration system exists
Budget is constrained but corrosion resistance is needed
Maintenance team experienced with copper alloys
Some fouling/cleaning cycles can be tolerated

Choose C70600 (90/10 CuNi) when:

Moderate water quality (some pollution risk)
Higher velocities (2.0–3.0 m/s)
Temperatures up to 80°C
Some sulfide risk exists but is controlled
Budget allows a 30–50% premium over C68700
Better long-term reliability is needed

Choose C71500 (70/30 CuNi) when:

Poor to moderate water quality
High velocities (> 3.0 m/s)
Temperatures up to 100°C
Sulfide contamination is possible
Low maintenance accessibility
Critical system with high downtime costs

Application & Compliance

C44300 Admiralty brass is specified almost exclusively where water is the cooling medium and the tube must remain leak-tight for a 10–30 year design life. It is the standard choice for surface condensers in power plants and marine propulsion systems, general industrial shell-and-tube exchangers, freshwater generators and evaporators, lube-oil and jacket-water coolers, and feedwater heaters in the lower temperature ranges. It is also used for instrumentation and condenser air-cooling sections where copper-nickel would be an unnecessary cost premium.

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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