Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of galvanized aluminum magnesium sheet coil zam 275 in China. Welcome to wholesale customized galvanized aluminum magnesium sheet coil zam 275 at low price from our factory. If you have any enquiry about free sample and cheap products, please feel free to email us.
What is Zinc-Aluminum-Magnesium Coated Steel?
Zinc-Aluminum-Magnesium coated steel, also known as ZAM-coated steel, is an innovative steel finish with superior corrosion resistance. Initially, pure zinc alloys were primarily used to enhance the corrosion resistance of metal surfaces. With continuous innovation in steel manufacturing technology, corrosion-resistant coated steels like zinc-aluminum alloys and ZAM alloys continue to emerge in the market, significantly improving the corrosion resistance of steel surfaces.
ZAM coating
ZAM coating Commonly used composition systems are Zn-6%Al-3%Mg, Zn-1.5%~8%Al-Mg.
Zinc (Zn): >85%, sacrificial anode protection
Aluminum (Al): 6-15%, formation of Al₂O₃ oxide film
Magnesium (Mg): 1-4%, self-repairing ability
Silicon (Si): trace, inhibit the growth of Fe-Al alloy layer
ZAM Coated Steel Finished Products
ZAM coil: The main form, up to 1250mm in width, cut to length on request for easy transportation and large scale continuous processing (uncoiling, straightening, slitting).
ZAM sheet: ZAM coil is flat and cross-cut, available in standard or customized sizes.
Prepainted ZAM steel: ZAM Coated steel serves as an excellent anti-corrosion substrate and can be coated with various organic coatings.
ZAM corrugated sheet/profile: ZM steel sheets or coils are processed into corrugated sheets, purlins, braces, and other structural members of various cross-sectional shapes by cold-forming units.
ZAM WELDED PIPE: ZM coated steel strip can be used to produce welded pipe fittings.
Mechanical Properties of the Substrate
| Substrate Type | Typical Grade Examples | Yield Strength (Rp0.2) MPa | Tensile Strength (Rm) MPa | Elongation (A80mm) % |
| Low Carbon Steel (Soft Steel) | DC01 / DC03 / SPCC | 140 – 280 | 270 – 400 | 28 – 42 |
| High Strength IF Steel | H180YD / H220YD | 180 – 220 | 300 – 350 | 34 – 40 |
| High Strength Low Alloy Steel (HSLA) | S355MC / QStE460TM | 355 – 460 | 430 – 560 | 18 – 24 |
| Bake Hardenable Steel (BH) | H220BD / H260BD | 220 – 260 | 340 – 390 | 34 – 38 |
| Dual Phase Steel (DP) | HCT600X / DP600 | 340 – 410 | 600 – 670 | 17 – 24 |
| Transformation Induced Plasticity Steel (TRIP) | RAK40/60H / CP800 | 450 – 600 | 780 – 980 | 18 – 26 |
| Martensitic Steel (MS) | HDT1000M / MS1200 | 950 – 1200 | 1200 – 1500 | 3 – 8 |
| Hot Rolled Substrate | S355J2 / Q355B | ≥355 | 470 – 630 | ≥22 (longitudinal) |
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ZAM Coating Material Grade
ZM 60 : Minimum total coating weight 60 g/m² on both sides.
ZM 80 : Minimum total coating weight 80 g/m² on both sides.
ZM 100: Minimum total coating weight 100 g/m² on both sides.
ZM 120: Minimum total coating weight on both sides 120 g/m².
ZM 150: Minimum total coating weight on both sides 150 g/m².
ZM 180: Min. total coating weight 180 g/m² on both sides.
ZM 210: Minimum total coating weight on both sides 210 g/m².
ZM 250/275: Minimum total coating weight on both sides 250/275 g/m².
GNEE STEEL's qualifications
GNEE STEEL participated in the exhibition
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