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S280GD+ZM Zinc Aluminum Magnesium(Zn-Al-Mg) Coated Steel Coil Sheet

Jul 15, 2026

Products Description

 

Hot Dip Alu-Zn-Mg Alloy Coated Steel is a new type of highly corrosion-resistant metallic coated steel plate. The Alu-Zn-Mg composition includes 5-57% aluminum, 43-86% zinc, 2-3% magnesium. 1.5% silicon and other elements.The thickness range that can be produced is 0.27mm-9.00mm, and the width range that can be produced is: 580mm-1250mm.

 

Compared with traditional hot-dip galvanizing, Hot Dip Alu-Zn-Mg Alloy Coated Stee has significantly improved plane corrosion resistance and notch corrosion resistance. It is widely used in the construction and electrical appliance industries and helps to greatly increase the service life of steel plates.

 

  • Zn-Al-Mg Steel Products Show

 

Zn-Al-Mg Steel Products Show

 

Grade S280GD+ZM

 

S280GD+ZM steel quality: Structural quality for construction

S280GD+ZM steel coating finish:
N (Normal spangle), M (Minimized spangle), R (Regular Zinc-magnesium alloy coating)

S280GD+ZM steel Coil/strip/sheet surface quality:
A (As coated surface), B (Improved surface),C (Best quality surface)

S280GD+ZM steel Coil/strip/sheet surface treatment:
C (Chemical passivation),O (oiling), CO(Chemical passivation and oiling), S ( Seales), P(Phosphated), U(Untreated)

S280GD+ZM steel Coil/strip/sheet coating mass:ZM060, ZM070, ZM080, ZM090, ZM100, ZM120, ZM130, ZM140, ZM150, (ZM160), (ZM175), (ZM200), (ZM250), (ZM300), (ZM310), (ZM350), (ZM430),

S280GD+ZM steel Coil/strip/sheet coating:Zinc-magnesium alloy (ZM) : application of a zinc-magnesium coating by immersing the prepared strip in a molten bath of zinc-aluminium-magnesium.

EN10346 S280GD+ZM steel suitable size: Thickness 0.3mm-3.0mm

 

S280GD+ZM steel

 

  • S280GD+ZM steel chemical composition % by mass max

 

Grade

Material No.

C

Si

Mn

P

S

S280GD+ZM

1.0244+ZM

0.20

0.60

1.70

0.10

0.045

 

  • S280GD+ZM steel Mechanical properties

 

Grade

Material No.

Yield Strength MPa
min

Tensile strength MPa min

Elongation A80 min

S280GD+ZM

1.0244+ZM

280

360

18

 

Zn-Al-Mg Steel Description

 

Item
Brand Name
GNEE STEEL
Application
Construction, light industry, automobile, etc
Delivery form
Steel Coil/Sheet
Thickness
0.2-8.0MM
Width
600-1500MM
Length
As clients' requests
Certificate
API, CE, ROHS, SNI, BIS, SASO, PVOC, SONCAP, SABS, sirm, tisi, KS, JIS, GS, ISO
Grade
DX51D-DX57D S220GD S250GD S550GD
Coating
ZM40-80-600g/㎡
Processing Service
Bending, Welding, Decoiling, Cutting, Punching
Content
Zn: 90% Al: 3%-11% Mg: 1.5%-3%
Surface Treatment
Chromated/Oiled
Delivery Time
3-15 days
Base material
Cold rolled steel
Coil Weight
5-10 MT
PAYMENT TERM
TT, LC, DA,DP, Western Union

 

Send Your Specifications and Receive a Customized Solution.

 

Zn-Al-Mg Steel Performance Characteristics

 
Grade
YS
TS
Elongation after fracture of the following nominal thickness (mm): a80mm,%, ≥
MPA
MPA
0.4~0.5
>0.5~0.7
>0.7
-
270~500
18
20
22
140~300
270~420
22
24
26
DC53D+ZM
140~220
270~350
30
32
32
S250GD+ZM
250
330
15
17
19
S280GD+ZM
280
360
14
16
18
S320GD+ZM
320
390
13
15
17
S350GD+ZM
350
420
12
14
16
S390GD+ZM
390~580
460
12
14
16
S420GD+ZM
420~610
480
11
13
15
S450GD+ZM
450~640
510
10
12
14
S550GD+ZM
550
560
-
-
-
HC260LAD+ZM
260~330
350~430
22
24
26
HC340LAD+ZM
340~420
410~510
17
19
21
HC220YD+ZM
220~280
340~420
28
30
32
HCT590X+ZM
330~430
590
16
18
20

 

Request Latest Steel Price Today

 

Product Characteristics of Zn-Al-Mg Steel

 

1,Excellent corrosion resistance
Zn-Al-Mg coatingsteel has better corrosion resistance. The increase of Al and Mg content in a certain range makes the corrosion resistance of Zn - Al-Mg coating steel sheet increase several times higher than that of Gl.


2,Good abrasion resistance
With low friction coefficient and stable friction characteristics, it is very favorable for punching. It can reduce the amount of wear on the coating, thereby reducing the part's pulling defects.


3,Good welding performance
The Zn-Al-Mg coating steel has good welding performance. The addition of magnesium can reduce the spatter of the weld attachment in the laser welding process and improve the welding performance.

 

Packaging and Shipping

 

Packaging and Shipping

 

FAQ

 

Q1: What are the advantages of S280GD+ZM steel?
A: It provides higher corrosion resistance, better edge protection and longer service life compared with traditional galvanized steel.

 

Q2: What are the applications of S280GD+ZM Steel Coil?
A: It is widely used for solar mounting systems, photovoltaic brackets, construction structures and industrial components.

 

Q3: What standards does S280GD+ZM steel meet?
A: S280GD+ZM is commonly produced according to EN 10346 standards with different ZM coating options.

 

Q4: Can S280GD+ZM be used for solar mounting structures?
A: Yes. Its high strength and excellent corrosion resistance make it an ideal material for PV mounting systems.

 

Q5: Why choose GNEE S280GD+ZM Steel Coil?
A: GNEE supplies reliable quality S280GD+ZM coils with competitive prices, complete certificates and customized solutions.