About GNEE Steel
GNEE Steel is a professional steel supplier specializing in high-quality galvanized steel, cold rolled steel, Zn-Al-Mg coated steel and customized steel products for global markets.
With many years of experience in steel manufacturing and international trade, GNEE provides reliable steel solutions for industries including solar mounting systems, construction, automotive, industrial equipment and infrastructure projects.
Located in China's major steel distribution center, we have established stable cooperation with leading steel mills and maintain strict quality control from raw material selection to final delivery. Our products are manufactured according to international standards such as EN, ASTM, JIS and GB, ensuring excellent performance, durability and consistency.
Zn-Al-Mg Steel Products Show
Advantages of Zn-Al-Mg Steel
Compared with traditional coatings such as hot-dip galvanizing, galvanized aluminum, and zinc-iron alloys, zinc-aluminum-magnesium coatings have better corrosion resistance.
(1) Since the zinc-aluminum-magnesium alloy coating is relatively thin and dense, it is not easy to peel off the coating;
(2) The corrosion products will flow and wrap around the cuts, so the protection performance for cuts and defects is better;
(3) It also has good corrosion resistance in some harsh corrosive environments (such as animal husbandry, coastal areas, etc.);
(4) It can replace some stainless steel with low requirements, or be galvanized after processing, etc., which can simplify the user's processing procedures.
S280GD+ZM steel chemical composition
| 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 |
Tensile strength MPa min |
Elongation A80 min |
|
1.0244+ZM |
280 |
360 |
18 |
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Applications
1.Construction:
Industrial roofs, warehouse frames, structural supports (C-beam, Z-beam or light steel keel raw materials), roofs and walls of large buildings such as stadiums.
2.Transportation:
truck trailers (doors, hoods, chassis components), cargo containers, vehicle reinforcement.
3.Heavy equipment :
Agricultural machinery, conveyor systems, storage racks.
4.Agriculture :
Structures for barns, livestock sheds, etc.
5.Energy infrastructure :
Installation systems for solar farms, transformer housings, transmission towers, distribution boxes.
S280GD+Z,S280GD+AZ, S280GD+ZM
| Property | S280GD+Z | S280GD+AZ (Galvalume) | S280GD+ZM (ZAM) |
| Coating | Pure Zinc | 55% Al-43.4% Zn-1.6% Si | Zn+Mg/Al (e.g., ZM310) |
| Corrosion | Good | Excellent | Outstanding |
| Heat Resistance | Moderate | Excellent | High |
| Appearance | Zinc-spangled | Silvery spangled | Uniform dark gray |
| Formability | Excellent | Good | Good (high toughness) |
| Cost | Low | Moderate | High |
| Typical Uses | Structural frames | Roofing, HVAC ducts | Coastal installations |
S280GD VS S350GD
| Property | S280GD galvanized steel | S350GD galvanized steel |
| Yield Strength | ≥280 MPa | ≥350 MPa |
| Tensile Strength | 380–500 MPa | 350–480 MPa |
| Formability | Excellent | Moderate |
| Weldability | Good | Moderate |
| Cost Efficiency | 15% lower vs. S350GD | Higher material cost |
| Best For | High-strength formable parts | Maximum load-bearing |
S280GD galvanized steel provides 27% higher strength than S220GD while retaining formability. For extreme environments, opt for S280GD+AZ/ZM coatings; for ultra-high strength, pair with S550GD substrates. GNEE STEEL delivers tailored steel solutions – contact us for competitive pricing!
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
|
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Zn-Al-Mg Steel Processing Service
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FAQ
Q1: What is S280GD+ZM Galvanized Steel Coil?
A: S280GD+ZM is a high-strength structural steel coil with a Zn-Al-Mg coating, offering excellent corrosion resistance and durability.
Q2: 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.
Q3: 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.
Q4: What standards does S280GD+ZM steel meet?
A: S280GD+ZM is commonly produced according to EN 10346 standards with different ZM coating options.
Q5: 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.
Q6: Why choose GNEE S280GD+ZM Steel Coil?
A: GNEE supplies reliable quality S280GD+ZM coils with competitive prices, complete certificates and customized solutions.
