What is DX51D+ZM Aluminum Coated Steel used for?
DX51D+ZM is a high-performance coated steel plate. It has a zinc (Zn), aluminum (Al), and magnesium (Mg) ternary alloy coating to achieve super corrosion resistance, self-healing ability, and excellent processing performance. It is used in the following fields:
Construction industry (harsh environment)
✅ Coastal building roof/curtain wall:
Resistant to marine climate corrosion (chloride ion environment), life span of more than 20 years
✅ Steel structure workshop:
Replace hot-dip galvanizing (Z275), reduce maintenance costs
Smooth surface (Smooth) is suitable for direct spraying
Photovoltaic new energy (core application)
✅ Solar bracket:
Weather resistance far exceeds galvanizing (salt spray ≥ 2000 hours), suitable for long-term outdoor use
Lightweight design (10-15% thinner than galvanizing under the same corrosion resistance)
✅ Photovoltaic frame:
High coating hardness (HV ≥ 150), resistant to wind and sand wear
Recommended coating: ZM80-ZM120 (double-sided 80-120g/m²)
Automobile manufacturing
✅ Chassis protection:
Resistant to stone impact corrosion, better than galvanized sheet
✅ Exhaust pipe guard:
Resistant to high temperature oxidation (aluminum element protection)
What is DX51D+ZM Aluminum Coated Steel equivalent to?
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Standard system |
Equivalent/similar grades |
Key Differences |
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Chinese national standard |
TDC51D+ZM (GB/T 14978) |
The composition and performance are completely consistent, and the coating weight must be indicated (such as ZM80) |
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European standard |
DX51D+ZM (EN 10346 + EN 16727) |
European standards clarify the classification of zinc, aluminum and magnesium coatings, with more detailed classification |
|
American ASTM |
ASTM A1046 ZM |
Classified by coating weight (e.g. ZM60 = 60g/m²), but with a wider range of magnesium content |
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Japanese JIS |
SGCC-ZM (non-standard customization) |
The composition needs to be clearly defined (such as Zn-6Al-3Mg), commonly used by Japanese manufacturers |
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International ISO |
ISO 4998 ZM |
Refer to the European standard system, but it is less used |
DX51D+ZM Aluminum Coated Steel material grade?
DX51D+ZM (zinc-aluminum-magnesium) is a high-performance coated steel sheet. Aluminum (Al) and magnesium (Mg) are added to the traditional zinc plating (Z) to form a ternary alloy coating, which has super corrosion resistance, self-repairing ability and excellent processing performance
Implementation standard: European standard EN 10346 (or national standard GB/T 14978)
DX51D: cold-formed commercial grade steel base (no yield strength requirements, suitable for deep stamping)
+ZM: zinc-aluminum-magnesium coating
Is DX51D+ZM steel of good quality?
DX51D zinc-aluminum-magnesium coated steel coil is a revolutionary upgrade of galvanized materials, especially suitable for long-term corrosion-resistant scenarios such as photovoltaic brackets and coastal buildings.
✔ Corrosion resistance: 5-10 times higher than galvanizing, 2-3 times higher than aluminum-zinc plating (55% Al-Zn)
✔ Economical: 50% lower cost than stainless steel, 20% lower than aluminum-magnesium plating (AlMg)
✔ Environmental protection: chromium-free passivation process complies with RoHS/REACH