DX51D Core
A low-carbon steel designated for bending and profiling; deep drawing needs a different material selection.
Global Steel Supply & Processing
DX51D / 1.0917 · 55% Al-Zn coated steel · AZ100 / AZ150 / AZ185
BUILD THE COIL SPECIFICATION
Source DX51D+AZ aluminum-zinc coated steel coil for roofing profiles, wall cladding, roll-formed components and sheet-metal fabrication. Tell us the coating mass, thickness basis, width, surface and shipment requirements for a tailored bulk quotation.
Your finished material is defined by more than its grade: choose the coating mass, dimensional basis, surface treatment and coil parameters together.
| Parameter | Procurement specification |
|---|---|
| Steel grade | DX51D / steel number 1.0917; bending and roll-forming quality |
| Coating system | +AZ: hot-dip 55% aluminum-zinc alloy coating, with a minor silicon addition |
| Reference edition | EN 10346:2015 is an established DX51D+AZ reference; confirm the contracted edition and current grade/coating eligibility |
| Dimensional tolerances | EN 10143:2006 when EN tolerances are specified |
| Nominal thickness | Define BMT (base metal thickness) or TCT (total coated thickness) explicitly; quotation range confirmed per order |
| Width & edge | Requested width, trimmed or mill edge, and applicable tolerances |
| Coating mass | AZ100 / AZ150 / AZ185, total both sides under EN 10346:2015 |
| Coil parameters | 508 mm or 610 mm ID if available; target net coil weight and outer diameter |
| Surface | Natural metallic finish; passivation, anti-fingerprint or oiling subject to confirmation |
| Delivery | Coil, slit coil or cut-to-length sheet by quotation |
| Quality documents | Specify MTC, coating-mass test, inspection and traceability requirements |
All quoted size ranges, finish options, available coil IDs and processing arrangements are confirmed against the actual source mill and order conditions.
The steel substrate and the aluminum-zinc coating have separate chemical specifications. Values below refer to the DX51D steel cast analysis, not the metallic coating.
| Element | Maximum mass % | Procurement relevance |
|---|---|---|
| Carbon (C) | 0.18 | Commercial forming-grade substrate; check actual heat analysis |
| Silicon (Si) | 0.50 | Cast-analysis reference for the substrate |
| Manganese (Mn) | 1.20 | Substrate chemistry limit |
| Phosphorus (P) | 0.12 | Impurity limit under the referenced edition |
| Sulfur (S) | 0.045 | Substrate impurity limit |
| Titanium (Ti) | 0.30 | Confirm applicable grade rules and any order agreement |
A low-carbon steel designated for bending and profiling; deep drawing needs a different material selection.
An alloy coating combining aluminum-rich barrier protection and zinc contribution at exposed sites.
Ask for heat chemistry, specified mechanical results and the agreed coating mass inspection.
For the EN 10346:2015 DX51D reference, tensile strength is specified while a single guaranteed minimum yield value is not. Formability still depends on thickness and process.
| Property | DX51D reference | Conditions |
|---|---|---|
| Tensile strength, Rm | 270–500 MPa | Transverse direction; EN 10346:2015 reference |
| Yield strength | No specified fixed range | Confirm if your structural calculation requires a guaranteed yield strength |
| Elongation, A80 | Minimum 22% | Standard thickness conditions; reductions apply in thinner gauges |
| Cold forming category | Bending / profiling | For roll forming and moderate bends; trial approval for complex parts |
| High-strength use | Specify a structural grade separately | DX51D is not a substitute for certified S-series structural performance |
Values are reference criteria under a specified edition. Thinner gauges can use modified elongation minima; order against the actual thickness and agreed test conditions.
DX51D is typically selected for roll forming and bending applications. Tight folds, deep draws and complex stamped parts require drawing-grade evaluation and may need separate mill trials.
AZ designation specifies nominal coating mass requirements across both sides of the steel strip under the referenced standard edition. It is not an individual-side mass.
Minimum triple-spot average coating mass, total both surfaces, under EN 10346:2015.
Minimum triple-spot average coating mass, total both surfaces; common in building-envelope substrates.
Minimum triple-spot average coating mass, total both surfaces. Specify the intended environment and coating tests.
Confirm coating-mass inspection, spangle appearance and surface treatment requirements.
Durability varies with humidity, coastal salts, pollutants, maintenance and exposed edges.
Discuss coating adhesion, edge conditions and any additional protection for severe environments.
Send gauge, width, net MT/coil, coating class and the receiving destination.
Specify the visible appearance and temporary storage protection before the coil is processed into roofing panels or fabricated components.
Metallic surface with a fine crystalline appearance that can vary by source mill and coating line.
Surface treatments can reduce handling marks or storage discoloration. Request the exact treatment and regulatory documentation.
Specify the expected visual quality and handling conditions for exposed metallic panels.
Confirm chemistry type, compatibility with downstream painting and any chromium-free requirement.
When specified, agree on storage time, cleaning approach and downstream processing compatibility.
Provide approved samples or surface appearance criteria alongside the coating class.
A complete coil request protects both your roll-forming setup and your final panel performance. State measurable requirements rather than relying on the grade name alone.
DX51D+AZ with the mutually agreed EN specification edition, or an explicitly approved alternative.
AZ100 / AZ150 / AZ185, surface treatment, visual criteria and coating-mass tests.
State whether thickness includes the coating, then specify width tolerance, coil ID and edge condition.
Set total tonnage, target net MT/coil, permissible OD, protective packing and destination.
The 55% aluminum-zinc coating makes this coil a practical substrate for selected building-envelope and manufactured components. Design and corrosion exposure still govern suitability.
Coil stock for trapezoidal profiles, roof panels and wall cladding with project-specific thickness and coating.
Roofing or wall panel substrates for factories, warehouses and commercial building envelopes.
Convert to roofing sheets after confirming forming radius, coating protection and project loads.
Select appearance, alloy mass and panel geometry for architectural and factory sheeting.
Use specified widths for folded trim, ridges, gutters and suitable metal accessories.
Coated coil blanks for selected enclosures, equipment housings and formed components.
Bulk master-coil procurement for slitting, blanking and regional distribution.
Al-Zn coated steel can be used as a substrate for suitably specified prepainted products.
Send the required sheet gauge, coating mass, profile geometry and project tonnage.
Estimate the relationship between base metal thickness, AZ coating mass, coil width and net coil weight before requesting mill-confirmed figures.
Enter base metal thickness (BMT) and the total two-sided AZ coating mass. The result includes the coating as an added mass, not as an extra steel thickness.
Estimate excludes strapping, packaging, dimensional tolerances and mass variation. Confirm whether quoted thickness is BMT or total coated thickness (TCT).
Steel substrate calculation: kg/m = BMT(mm) × width(mm) × 0.00785. Add total AZ coating mass(g/m²) × width(mm) / 1,000,000. Coil length = net mass(kg) ÷ calculated kg/m.
Coating performance depends on steel preparation, continuous hot dipping, alloy coating control, cooling, surface protection and final coil handling.
Steel strip enters a continuously controlled hot-dip coating process and receives a 55% Al-Zn alloy layer. Surface conditioning, protection treatment and inspection complete the material before recoiling.
A clear coated-coil quotation specifies the substrate, coating mass, processing and shipment requirements together.
8 million MT annual steel production across the overall business; this is not a DX51D+AZ-specific output claim.
Define the AZ designation, thickness basis, surface condition, widths and coil geometry before purchase.
Request the applicable MTC, coating-mass inspection and traceability documentation by contract.
Coordinate slit widths, net coil mass, protective packing, loading plans and destination terms.
Request related services together with the main coil quotation; exact capability, width tolerance, edge quality and material yield depend on thickness and coating.
Specify slit width, winding direction, burr requirement, ID and packing orientation.
Order cut lengths or blanks with length tolerance, flatness and sheet-stacking protection.
Provide bend radius, desired surface appearance and dimensions for the roofing or cladding line.
Attach your slit schedule and target coil weights so feasibility can be confirmed.
A useful inspection plan verifies the base steel grade, mechanical criteria where specified, coating mass and the dimensional requirements in the purchase contract.
Request the inspection records that correspond to the actual delivered heat, coil batch and ordered coating class. Include any additional third-party inspection requirement in the RFQ.
Availability for each AZ-coated combination depends on the contracted grade, coating mass, gauge, finish, coil width and delivery region.
Confirm the agreed DX51D+AZ standard edition, AZ mass, BMT/TCT, net coil weight and surface treatment. Our team can review order splitting, processing and logistics against your project schedule.
Keep AZ-coated surfaces dry and protected during storage and transport. Confirm the packing system in relation to coil dimensions, shipping duration and unloading method.
Depending on contract terms, moisture barriers, edge guards, steel strapping and secure pallets or skids can be specified. Transport plans should address coil orientation and lifting access.
Compare aluminum-zinc coil grades with zinc-coated and fabricated sheet options before selecting your project specification.
Technical answers about coating composition, AZ mass, forming grade, standards editions, applications and international procurement.
DX51D is a low-carbon bending and profiling steel grade. +AZ identifies a hot-dip 55% aluminum-zinc alloy coating, commonly specified in AZ coating-mass classes.
No. DX51D is the substrate grade, but +AZ specifies aluminum-rich zinc alloy coating while +Z denotes zinc coating. The coating systems have different compositions and corrosion characteristics.
Under EN 10346:2015 these indicate minimum triple-spot average coating masses of 100, 150 and 185 g/m² respectively, measured across both sides together.
No. AZ150 is the total two-sided coating mass designation, not 150 g/m² on each face.
DX51D+AZ is explicitly included in EN 10346:2015. Because revisions of EN 10346 have been published, ask us to confirm the edition and grade/coating eligibility applicable to your order before a standards-compliance claim is made.
The EN 10346:2015 DX51D reference specifies 270–500 MPa tensile strength for its relevant conditions. The actual certificate and applicable edition govern the order.
The referenced DX51D table does not prescribe a single fixed guaranteed yield range. For structural load requirements, request the specified structural grade instead.
It can be considered for roll-formed roofing and cladding profiles. The project engineer must confirm the grade, sheet thickness, span, load case, corrosion exposure and profile geometry.
Coating behavior depends on environment, exposed edges, design and coating mass. Compare the performance specification and exposure conditions rather than equating AZ and GI mass designations.
Surface treatments such as passivation or anti-fingerprint protection may be specified subject to mill capability and compatibility with the intended process.
Yes. It adds the combined AZ coating mass to a steel substrate calculated from base metal thickness. Entering total coated thickness as BMT would count the coating twice.
Provide the standard edition, AZ coating class, BMT or TCT, width, coil ID, net MT/coil, total tonnage, surface protection, inspection requirements and destination.
Send your DX51D+AZ grade, the applicable EN specification edition, AZ coating mass, base metal thickness or total coated thickness, coil width and ID, target net weight, quantity, surface treatment, inspection documents and destination.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.