Dx54D+As120 Aluminzed Steel Tube For Heat Exchange Tube

Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of dx54d+as120 aluminzed steel tube for heat exchange tube in China. Welcome to wholesale customized dx54d+as120 aluminzed steel tube for heat exchange tube at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.

 

Aluminized pipe refers to a type of pipe or exhaust system that has a thin layer of aluminum coating on the surface. It is an aluminum-silicon alloy coated steel pipe, in which aluminum content is 90%, silicon 10%. This coating helps to protect the steel pipe from corrosion and oxidation, making it more durable and long-lasting.

A non-alloy steel grade that is classified under the category of galvanized steel (EN 10346:2015).
Feature: A low-carbon steel with a coating of zinc and has a minimum yield strength of 120 MPa.
Performance: Good corrosion resistance, formability, and weldability, excellent deep-drawing properties, which makes it suitable for use in stamping and forming applications

 

Grade	YS(Mpa)	TS(Mpa)	EL(A80/%)min
DX53D	140-260	270-380	30
DX54D	120-220	260-350	34
DX56D	120-180	260-350	37

 

Product Name	Aluminized Silicon Alloy Coated Steel Pipe
Material	DX51D/DX52D/DX53D/DX56D/SA1C/SA1D
Function	Anti-corrosion
Thickness	0.5mm-2.0mm
OD	15-80mm
Weight	4-12TONS
Surface treatment	Chromated, Oiled
Zinc coating	80-400G/M2
Package	Standard export seaworthy package.
Payment terms	L/C ,T/T

 

 

Aluminized pipe is commonly used in automotive exhaust systems, HVAC ductwork, and in various industrial applications where a reliable and corrosion-resistant pipe is required. Its usage includes transporting or removing gases from engines, machines, or heat-generating systems.

1. HVAC system:

 

Aluminum plated steel pipes are commonly used as delivery pipes for refrigerants (such as refrigerantR410A) in HVAC systems. Aluminum coating can provide good corrosion resistance and protect steel pipes from refrigerant corrosion.

 

2. Cooling system:

 

Aluminum plated steel pipes can be used for water coolers, cooling towers, and other cooling equipment in the cooling system. Aluminum coating can improve the corrosion resistance of steel pipes and protect their use in humid environments.

3. Automotive manufacturing:

 

Aluminized steel pipes are widely used in automotive manufacturing for pipelines such as brake systems, fuel systems, and exhaust systems. Aluminum coating can provide excellent corrosion resistance and wear resistance, while also possessing high strength and stiffness

 

Unit Mass Table for Sheets (kg/m²)
Nominal thickness (mm)	Aluminum coating mass designation
	40	60	80	100	120
0.30	2.242	2.186	2.130	2.065	2.017
0.35	2.635	2.578	2.552	2.458	2.409
0.40	3.027	2.971	2.915	2.850	2.802
0.50	3.812	3.756	3.700	3.635	3.587
0.60	4.597	4.541	4.485	4.420	4.372
0.70	5.382	5.326	5.270	5.205	5.157
0.80	6.167	6.111	6.055	5.990	5.942
0.90	6.952	6.896	6.840	6.775	6.727
1.0	7.737	7.681	7.625	7.560	7.512
1.2	9.307	9.251	9.195	9.130	9.082
1.4	10.88	10.82	10.76	10.70	10.65
1.6	12.45	12.39	12.33	12.27	12.22
2.0	15.59	15.53	15.47	15.41	15.36
2.3	17.94	17.89	17.83	17.77	17.72
2.5	19.51	19.46	19.40	19.34	19.29

 

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ALUMINIZED STEEL COIL
PRODUCT	SPECIFICATION (MM)	GRADE
Aluminized Steel Coil	0.4*1219	DX53D+AS120
	0.5*1250	DX53D+AS120
	0.5*1219	DX53D+AS120
	0.6*1219	DX53D+AS120
	0.6*1220	DX53D+AS120
	0.8*1219	DX53D+AS120
	1.2*1219	DX53D+AS120
	1.5*1219	DX53D+AS120
	0.6*1000	DX51D+AS275
	0.8*1000	DX51D+AS275
	0.8*1000	DX51D+AS240

 

1. What does "Dx54D+As120" signify?

Dx54D: A European standard (EN 10346) for deep-drawing quality low-carbon steel, offering excellent formability.

+As: An Aluminum-Silicon alloy coating (approx. 91% Al, 9% Si).

120: A total double-sided coating weight of 120 g/m^2.

 

2. Why Al-Si coating instead of Pure Aluminum?

The addition of Silicon is critical for heat exchangers. It prevents the formation of a brittle iron-aluminum alloy layer during production, ensuring the coating remains flexible and does not crack or peel during tube bending or flaring.

 

3. What are the key advantages for Heat Exchangers?

Heat Resistance: Maintains structural integrity and oxidation resistance up to 450°C - 650°C (where galvanized steel fails).

Corrosion Resistance: Highly resistant to acidic condensates and sulfur-containing exhaust gases.

Thermal Reflectivity: Reflects up to 80% of radiant heat, improving thermal efficiency.

 

 4. What are the welding requirements?

Surface Prep: For high-strength welds, remove the coating from the welding zone to prevent aluminum embrittlement in the weld pool.

Current Settings: Requires higher welding current than cold-rolled steel due to the coating's high conductivity.

Protection: Post-weld areas must be treated with aluminum-rich spray to restore corrosion resistance.

 

5. How to verify the quality of these tubes?

Flaring/Flattening Test: The tube should withstand expansion (usually 1.2x - 1.5x diameter) without coating delamination.

Coating Uniformity: Check for "pinholes," bubbles, or bare spots.

Salt Spray Test (NSS): High-quality As120 should typically pass 400+ hours of neutral salt spray testing without red rust.

 

 

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