language

Home

Products

Dx51d+As120 Aluminized Steel Pipe

DX51D+AS120 combines a widely used European cold-forming steel substrate with a medium Al-Si coating level. For buyers sourcing

Keywords:

Dx51d+As120 Aluminized Steel Pipe

Category:

Aluminized Steel Coil / Tube

Inquiry Now

Send E-mail

File Download

sales1@tedaganghua.com

+86 22 86896631、+86 15822676888

Product Details

DX51D+AS120 combines a widely used European cold-forming steel substrate with a medium Al-Si coating level. For buyers sourcing aluminized steel pipe to an EN specification, this designation provides a clear way to define both the steel base and the coating. It is suitable for many general-purpose applications where formability, corrosion resistance, and practical cost need to be balanced.

What Does DX51D+AS120 Mean?

The designation contains two technical parts:

DX51D = a widely used EN 10346 cold-forming steel grade

AS120 = an Al-Si coating designation with a nominal total coating mass of about 120 g/m², subject to the applicable standard and coating tolerances

In other words, DX51D defines the substrate and AS120 defines the coating. The two specifications should be confirmed separately when placing an order.

DX51D is intended for cold forming. Under EN 10346, its proof/yield strength requirement depends on thickness, but it is generally a relatively low-strength, highly formable substrate rather than a structural high-strength grade.

EN 10346: The European Standard Behind the Specification

EN 10346 covers continuously hot-dip coated flat steel products. It provides requirements for the steel grades, mechanical properties, coating designations, coating mass, dimensions, and related delivery conditions.

For a tube or pipe made from continuously coated strip, the purchasing specification should therefore make clear that the feed material is DX51D+AS120 according to EN 10346. The tube manufacturing route itself may be covered by additional product or manufacturing requirements.

Specification	Meaning	Typical Procurement Focus
DX51D	Cold-forming steel substrate	Formability and mechanical properties
AS120	Al-Si coating grade	Coating mass and surface protection
EN 10346	European continuous hot-dip coating standard	Grade, coating, tolerance, and delivery requirements

DX51D Substrate: Mechanical Data

One important point is that DX51D should not be described as a 500 MPa-class yield-strength steel. It is a cold-forming grade. Under EN 10346, the required proof/yield strength and tensile strength vary with product thickness.

Property	DX51D Reference	Meaning for Buyers
Proof / yield strength	Typically up to about 280 MPa depending on thickness	Not a high-strength structural grade
Tensile strength	Typically 270–500 MPa depending on the applicable thickness range	Confirm the exact thickness range
Forming class	Cold forming	Suitable for many formed components
Substrate role	Steel base	Provides structural body of the pipe

For a contractual purchase, the exact EN 10346 edition, thickness range, mechanical requirements, and inspection document should be confirmed. A generic number should not replace the standard's thickness-specific requirements.

AS120: The Coating Side of the Specification

AS120 identifies an Al-Si coating level of approximately 120 g/m² total coating mass for both sides in the conventional designation system. The exact minimum values and tolerance depend on the applicable specification and measurement basis.

The coating consists of an aluminum-silicon-rich outer layer and an alloyed transition region between the coating and steel substrate. This system provides useful resistance to oxidation and corrosion in many industrial environments.

Coating weight should not be treated as a direct guarantee of service life. Actual performance also depends on temperature, humidity, pollutants, thermal cycling, forming, weld areas, cut edges, mechanical damage, and the surrounding environment.

Typical DX51D+AS120 Pipe Specifications

The following dimensions are practical inquiry examples. They are not intended to represent a universal EN size table.

Profile	Example Size	Wall Thickness	Length	Coating
Round pipe	25 mm OD	1.0 mm	6,000 mm	AS120
Round pipe	38.1 mm OD	1.2 mm	6,000 mm	AS120
Round pipe	50.8 mm OD	1.5 mm	6,000 mm	AS120
Oval pipe	50 × 25 mm	1.5 mm	6,000 mm	AS120

For custom profiles, the buyer should provide a drawing. The drawing should show the outside profile, wall thickness, dimensional tolerances, length, coating requirement, and any bending or forming requirements.

Where Is DX51D+AS120 Used?

This combination is suited to many general-purpose applications where the substrate must be readily formable and the coating must provide more protection than a light coating grade.

General Tubing

Used for selected general-purpose tubes, fabricated components, guards, supports, and equipment parts.

Building Components

Can be considered for housings, enclosures, light structural components, and other building-related parts where the specification is suitable.

Equipment Shells

Useful for selected equipment covers and formed shells where corrosion resistance and cold forming are both required.

For hot exhaust applications, the operating temperature and thermal cycle should be checked before specifying the material. AS120 is a coating grade, not a universal temperature rating.

DX51D+AS120 vs JIS SA1C+AS

European and JIS designations should not be treated as automatically identical. The systems use different grade definitions and standard structures. A buyer comparing the two should compare the actual chemical, mechanical, coating, dimensional, and delivery requirements.

Item	EN System	JIS-Oriented System
Substrate example	DX51D	SA1C
Coating example	AS120	AS-series coating
Main reference	EN 10346	Applicable JIS specification
Grade meaning	European cold-forming grade system	JIS substrate designation system
Equivalence	Must be verified	Must be verified

A commercial cross-reference can be useful for sourcing, but it should not replace the required standard. If a project specification states EN 10346, the purchase order should retain the EN designation rather than relying on a claimed JIS equivalent.

How to Write the Purchase Specification

For an EN-based inquiry, a clear description can be written as:

Product: Aluminized steel pipe

Steel grade: DX51D

Coating: AS120

Standard: EN 10346

Size: 50.8 mm OD × 1.5 mm WT

Length: 6,000 mm

Quantity: 2,000 pcs

For a custom tube, add the profile drawing, dimensional tolerances, weld requirements, surface requirements, inspection documents, and downstream processing requirements.

Best procurement wording: “DX51D+AS120 aluminized steel pipe, EN 10346, [OD or profile] × [WT] × [length], [quantity].” This prevents the substrate grade and coating grade from being confused.

Stock and Supply Availability

For standard sizes, stock availability can reduce lead time compared with a fully custom production order. Teda Ganghua can support inquiries for aluminized steel products by checking available dimensions, coating grades, quantities, and production options.

For project orders, buyers can provide the complete DX51D+AS120 specification together with the required quantity and delivery schedule. This makes it easier to determine whether the requirement can be supplied from available material or should be arranged as a production order.

FAQ

1. What does DX51D+AS120 mean?

DX51D identifies the EN cold-forming steel substrate, while AS120 identifies the Al-Si coating level. Together they define both the base steel and coating requirement.

2. Is DX51D a high-strength steel?

No. DX51D is primarily a cold-forming grade. Its proof/yield strength is generally in the low-to-moderate range and depends on product thickness. It should not be confused with 500 MPa-class structural grades.

3. What does AS120 specify?

AS120 refers to an Al-Si coating level of approximately 120 g/m² total coating mass in the conventional designation system. Exact requirements and tolerances should be confirmed against the applicable specification.

4. Is DX51D+AS120 equivalent to JIS SA1C+AS?

They can serve similar general-purpose roles, but they should not be treated as automatically equivalent. The applicable EN and JIS requirements must be compared before substitution.

5. Can DX51D+AS120 pipe be supplied from stock?

Standard sizes may be available from stock, depending on profile, dimensions, coating, and quantity. Providing the complete EN 10346 specification allows availability to be checked more accurately.