Product Categories:
DX57D+ZF Galvannealed Steel Coil
Product Description
DX57D+ZF Galvannealed Steel Coil is a zinc-iron alloy coated steel product designed for special extra deep drawing applications and highly demanding cold forming processes. Manufactured through continuous hot-dip galvanizing followed by controlled alloying heat treatment, DX57D+ZF features a metallurgically bonded zinc-iron coating that supports subsequent painting, resistance spot welding, and metal fabrication.
DX57D+ZF combines a special extra-deep-drawing-quality steel substrate with a zinc-iron alloy coating. With high elongation, an excellent plastic strain ratio, and a high strain hardening exponent, DX57D+ZF is designed for complex forming operations requiring substantial material deformation and consistent forming performance.
For manufacturers producing complex automotive stamped components, home appliance panels, and precision sheet metal parts, DX57D+ZF provides a material option where high substrate formability and subsequent surface finishing are important. Compared with DX56D+ZF, DX57D+ZF has higher minimum elongation, plastic strain ratio, and strain hardening exponent requirements in Rosen's published specifications.
Rosen supplies DX57D+ZF Galvannealed Steel Coil with different coating specifications and dimensions, subject to production availability.
Product Features
Material Grade and Applications
Coating Types and Surface Treatment Methods
Available Range
Chemical Composition
Mechanical Property
Product Features
Zinc-Iron Alloy Coating
DX57D+ZF features a ZF coating formed through hot-dip galvanizing followed by controlled alloying heat treatment. Iron diffuses into the zinc layer to form a zinc-iron alloy coating with a characteristic matte gray appearance.
Special Extra Deep Drawing Performance
DX57D is intended for demanding deep drawing applications requiring high deformation capability. Its mechanical properties, including elongation, plastic strain ratio, and strain hardening exponent, support complex forming operations.
High Elongation and Plastic Deformation
The high minimum elongation of DX57D+ZF supports substantial plastic deformation during forming. Its higher r-value and n-value requirements are also important when evaluating material suitability for complex stamping operations.
Good Paintability
The galvannealed surface provides favorable characteristics for subsequent painting and powder coating. Appropriate cleaning and surface pretreatment should be selected according to the final coating system.
Resistance Spot Welding Compatibility
The zinc-iron alloy coating is suitable for resistance spot welding applications. Welding current, electrode pressure, welding time, and electrode maintenance should be adjusted according to the coating specification and production conditions.
Corrosion Protection
The zinc-containing alloy coating provides sacrificial corrosion protection to the steel substrate. Coating mass, surface treatment, and additional painting systems should be considered together to meet the corrosion protection requirements of different applications.
Material Grade and Applications
DX57D+ZF consists of a DX57D steel substrate and a ZF zinc-iron alloy coating. It is intended for demanding forming applications requiring high ductility and excellent plastic deformation characteristics.
Material Specification | Description |
|---|---|
Steel Grade | DX57D+ZF |
Applicable Standard | EN 10346 |
Substrate Grade | DX57D |
Coating Type | ZF - Zinc-Iron Alloy Coating |
Forming Category | Special Extra Deep Drawing |
Product Form | Steel Coil |
Automotive Components: Complex stamped automotive panels, formed body components, and parts requiring substantial deformation and subsequent painting.
Home Appliances: Deep-drawn refrigerator components, washing machine panels, and complex appliance sheet metal parts.
Electrical Equipment: Complex formed electrical enclosures, metal housings, and cabinet components.
Industrial Equipment: Deep-drawn covers, equipment casings, and fabricated metal components requiring demanding forming operations.
Precision Metal Fabrication: Complex sheet metal parts involving special deep drawing, bending, and subsequent surface finishing.
Coating Types and Surface Treatment Methods
DX57D+ZF uses a zinc-iron alloy coating designated as ZF. Different surface treatments can be selected according to storage, forming, welding, and subsequent finishing requirements.
Surface Treatment | Code | Description |
|---|---|---|
Unprocessed | U | Without additional surface treatment |
Chromic Acid Passivation | C | Passivation treatment for surface protection |
Oiling | O | Oil application to support storage and processing |
Passivation + Oiling | CO | Combined passivation and oiling treatment |
Chrome-Free Passivation | C5 | Passivation without chromium |
Chrome-Free Passivation + Oiling | CO5 | Combined chrome-free passivation and oiling |
Chrome-Free Inorganic Passivation | IC | Inorganic passivation treatment without chromium |
Chrome-Free Inorganic Passivation + Oiling | ICO | Combined inorganic passivation and oiling |
Self-Lubricating | SL | Surface treatment with self-lubricating properties |
Chrome-Free Self-Lubrication | SL2 | Self-lubricating treatment without chromium |
Easy-Workability Self-Lubrication | EW | Surface treatment designed to support forming operations |
Inorganic Self-Lubrication | SW | Inorganic self-lubricating treatment |
Inorganic Solid-State Lubrication | T | Inorganic solid-state lubrication |
Chrome-Free Fingerprint-Resistant | N5 | Surface treatment for fingerprint resistance |
Conductive and Fingerprint-Resistant | NE | Chrome-free conductive and fingerprint-resistant treatment |
Available surface treatments should be confirmed according to actual production specifications and order requirements.
Available Range
Rosen supplies DX57D+ZF Galvannealed Steel Coil within the following published galvannealed steel product range. Specific grade, coating, and dimension combinations are subject to confirmation.
Parameter | Available Range |
|---|---|
Steel Grade | DX57D+ZF |
Thickness | 0.5–2.5 mm |
Width | 800–1800 mm |
Coil Inner Diameter | 508 mm / 610 mm |
Coating Type | Zinc-Iron Alloy Coating (ZF) |
Coating Weight | 80–120 g/m² (Double-Sided) |
Stock Delivery Time | Approximately 10 days |
Custom Production Lead Time | Approximately 60–80 days |
Chemical Composition
The following table presents the chemical composition limits published in Rosen's galvannealed steel specifications. Values are expressed as maximum mass percentages.
Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Ti (%) |
|---|---|---|---|---|---|---|
DX57D+ZF | ≤0.01 | ≤0.30 | ≤0.30 | ≤0.03 | ≤0.02 | ≤0.20 |
Mechanical Property
DX57D+ZF is designed for demanding deep drawing applications. Its mechanical properties feature high elongation, a high plastic strain ratio, and a high strain hardening exponent, supporting complex forming processes.
Property | Specification |
|---|---|
Yield Strength | 120–170 MPa |
Tensile Strength | 260–350 MPa |
Elongation (A80) | ≥39% |
Plastic Strain Ratio (r90) | ≥1.9 |
Strain Hardening Exponent (n90) | ≥0.21 |
Actual mechanical properties should be verified against the applicable product standard and the material test certificate supplied with the order.
Welcome to contact us for a free quote/ more information
Please leave your request for any product you wish. We are honored to search it for you in our databases or customize for you
Contact Us
E-mail: partner@rosensteelga.com
Tel: +86-27-86615388
WhatsApp: +86 177 6252 7953
WeChat:Rosen17762527953
Add.: No. 1, 30th Floor, Building 1, Fuxing Huiyu Waterfront International, Sanjiao Road Village, Xujiapeng Street, Wuchang District, Wuhan City, Hubei Province,P.R.China
