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En 10346 Sa1c Aluminized Steel Pipe

When a Japanese drawing specifies SA1C but a European project asks for EN 10346 material, the purchasing question

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En 10346 Sa1c Aluminized Steel Pipe

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Aluminized Steel Coil / Tube

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When a Japanese drawing specifies SA1C but a European project asks for EN 10346 material, the purchasing question is not “What is EN 10346 SA1C?” but “Which EN grade corresponds to the required JIS commercial-quality substrate?” JIS G 3314 uses SA1C for commercial-quality aluminium-coated steel, while EN 10346 uses the DX grade system. Industry cross-reference tables commonly map JIS SA1C to EN DX51D+AS.

Purchasing answer: If the original requirement is JIS G 3314 SA1C and the European project needs an EN designation, the normal translation is EN 10346 DX51D+AS, provided the required coating mass, mechanical properties and forming requirements are also satisfied. SA1C itself should not be inserted into an EN 10346 designation.

1. SA1C and DX51D: The Basic Translation

SA1C is a JIS G 3314 grade describing commercial-quality aluminium-coated steel. EN 10346 uses DX51D as the corresponding commercial-quality cold-forming grade. A published comparison from ArcelorMittal's Alusi® documentation places JIS 3314 SA1C alongside EN 10346 DX51D+AS.

Purchasing Item	JIS Route	EN Route
Standard	JIS G 3314	EN 10346
Base grade	SA1C	DX51D
Quality level	Commercial quality	Commercial / general cold forming
Aluminium coating	JIS coating designation	+AS
Typical translation	SA1C + coating class	DX51D+AS + coating mass

The important point is that SA1C and DX51D are grade designations from different standards. They can be used as purchasing cross-references, but they should not be physically merged into a designation such as “EN 10346 SA1C.”

2. What SA1C Means in JIS G 3314

JIS G 3314 divides aluminium-coated steel into different forming-quality categories. SA1C is the commercial-quality grade, while SA1D and SA1E move toward more demanding drawing and deep-drawing applications. Published comparison data identifies SA1C as the commercial-quality category.

SA1C

Commercial-quality aluminium-coated steel for general forming applications.

SA1D

Higher drawing capability than the commercial-quality category.

SA1E

Deep-drawing category for more demanding forming.

Therefore, if a buyer only needs the general commercial-quality level represented by SA1C, moving directly to the EN DX51D family is usually more logical than selecting a higher-formability DX grade.

3. What DX51D+AS Means

Under EN 10346, DX51D identifies the steel grade and +AS identifies the aluminium-silicon coating. The designation therefore carries two separate pieces of information: substrate and coating.

Part of Designation	Example	Purchasing Meaning
Steel grade	DX51D	Commercial-quality cold-forming substrate
Coating symbol	+AS	Aluminium-silicon alloy coating
Coating mass	AS120	Commercial designation for the specified coating-mass class; confirm the exact standard requirement

Some commercial product tables show DX51D+AS as the EN counterpart of JIS SA1C, and EN coating classes such as AS060, AS080, AS100 and AS120 are used in commercial specifications.

4. Performance Comparison: SA1C vs DX51D

A cross-reference is useful only when the mechanical-property window is also checked. The following table is a purchasing translation guide, not a statement that every JIS SA1C product and every DX51D product has identical guaranteed values.

Property	JIS SA1C	EN DX51D	Purchasing Interpretation
Quality category	Commercial	Commercial / general cold forming	Broadly aligned
Forming level	General forming	General cold forming	Suitable for relatively simple forming
Deep drawing	Not the primary SA1C purpose	Not the primary DX51D purpose	Consider higher grade if drawing is demanding
Coating	JIS aluminium coating	+AS aluminium-silicon coating	Verify coating chemistry and mass separately

For actual substitution, the buyer should compare the applicable standard's yield strength, tensile strength, elongation, thickness range and coating requirements rather than approving an equivalent grade from its name alone.

5. Can SA1C Be Replaced by DX51D?

Often yes for sourcing translation, but not automatically for contractual substitution. A published industry comparison explicitly maps SA1C to DX51D+AS, while other cross-reference material shows the same commercial-quality relationship.

Replacement is more likely to be acceptable when:

The project accepts equivalent international standards.
The required forming level is commercial/general forming.
The aluminium coating chemistry and coating mass are equivalent.
Mechanical properties satisfy the project specification.
The customer accepts EN documentation and inspection certificates.

Do not substitute automatically when:

The drawing explicitly requires JIS G 3314.
The customer requires a JIS certificate.
The component has a tightly controlled forming process.
The coating mass or surface condition is contractually defined by JIS.
The European project specification lists EN 10346 as a mandatory material standard without an equivalency clause.

6. SA1C and DX51D for Tube Production

When the coated sheet or strip is subsequently formed into pipe or tube, the substrate translation becomes especially important. A buyer may see SA1C aluminized steel pipe on a Japanese drawing and DX51D+AS tube on a European supplier quotation. The two descriptions may refer to the same commercial-quality material concept, but the finished tube still needs its own dimensional and manufacturing requirements.

Tube Requirement	What to Confirm
Substrate	SA1C or translated DX51D requirement
Coating	Al-Si coating type and exact coating mass
Tube shape	Round, square, rectangular or special section
Dimensions	OD or section size, wall thickness and length
Manufacturing	ERW/HFW, forming sequence and weld requirements
Documentation	MTC, coating verification and dimensional inspection

This avoids a common mistake: assuming that a correct sheet-grade translation automatically defines the finished tube. The tube standard, dimensions and fabrication requirements must still be stated.

7. European Project Using Japanese Material

A European project can use Japanese-origin material if the project specification, engineer and purchaser accept the relevant JIS grade. In this case, the cleanest documentation approach is to preserve the original JIS designation and show the EN comparison separately.

Original material: JIS G 3314 SA1C + specified aluminium coating

EN purchasing reference: EN 10346 DX51D+AS + corresponding coating mass

Certificate: State which standard the material actually complies with; do not describe an equivalency as dual certification unless both requirements have been verified.

This distinction is valuable when a European customer wants Japanese material for an established production line but needs an EN-based purchasing description for its internal ERP, procurement system or project documentation.

8. Dual-Standard Purchasing: How to Write It

If both standards are required, the purchase order should list them separately instead of creating a hybrid grade.

Scenario	Recommended Wording
JIS material only	JIS G 3314 SA1C + coating designation
EN material only	EN 10346 DX51D+AS + coating mass
EN project accepting JIS equivalent	JIS G 3314 SA1C, accepted as equivalent to EN 10346 DX51D+AS subject to project approval
True dual compliance	JIS G 3314 SA1C + EN 10346 DX51D+AS, with compliance to both standards documented

“Equivalent to” and “complies with” should never be used interchangeably. This small wording difference can become important during incoming inspection, third-party certification or project document review.

9. Teda Ganghua Supply Support

For buyers who receive a Japanese drawing but need European procurement documentation, Teda Ganghua can help organize the material specification as a clear JIS-to-EN purchasing translation. The quotation can separate the substrate grade, aluminium-silicon coating, coating mass, tube dimensions and inspection requirements instead of mixing JIS and EN designations.

For sourcing inquiries, see aluminized steel and provide the original SA1C designation, required coating class, tube size, wall thickness, length, quantity and applicable project standard. The cross-reference can then be checked before production and certification.

10. FAQ

What is the EN equivalent of JIS SA1C?

The commonly used cross-reference is EN 10346 DX51D+AS for the commercial-quality aluminium-silicon-coated steel category. The exact coating mass and mechanical requirements still need to be verified.

Is SA1C the same grade as DX51D?

They are grades from different standards and are commonly treated as corresponding commercial-quality grades. They should be described as a cross-standard equivalent or reference rather than as literally identical specifications.

Can I write “EN 10346 SA1C” on a purchase order?

No. SA1C belongs to JIS G 3314. An EN-based order should use the appropriate DX designation, such as DX51D+AS, together with the required coating mass and finished-product requirements.

Can Japanese SA1C material be used in a European project?

Yes, if the project specification or responsible engineer accepts the JIS material. The documentation should clearly identify the actual JIS compliance and, where applicable, provide the EN cross-reference separately.

Does DX51D+AS automatically mean the tube is fully EN certified?

No. The designation identifies the coated steel material, but a finished tube may require additional requirements for manufacturing method, dimensions, tolerances, weld quality, testing and inspection documentation.