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S350GD is a high-strength structural grade hot-dip galvanized steel grade named according to the European standard EN 10346, designed specifically for cold formed structural applications. S350GD galvanized steel coil is one of the most widely used structural grade hot-dip galvanized steels under the EN 10346 standard. It achieves a good balance between cold forming performance, load-bearing capacity, and corrosion resistance, making it a cost-effective material selection solution in engineering fields such as light steel structures, building purlins, and photovoltaic brackets.

The meanings of each part in the S350GD grade are as follows:

S: Structural Steel

350: Minimum yield strength ≥ 350 MPa

G: Hot dip galvanizing

D: Cold forming (cold-rolled substrate), sometimes interpreted as Drawing, refers to the application of cold bending forming.

Simply put, S350GD represents “structural grade hot-dip galvanized cold-rolled steel with a minimum yield strength of 350MPa”.

Wanzhi can supply S350GD cold-rolled and hot-rolled galvanized steel coils, with low factory prices and high quality. We can produce and sell galvanized steel coils with a width of 600-1500mm and a coating weight of 30-275g/m3. We produce galvanized steel coils according to EN 10346 and ASTM A653 standards.

The thickness, width, length, zinc layer, standards, materials, etc. of steel coils can be customized. Wanzhi can provide normal spangle, skinpassed spangle, regular spangle, minimized spangle or customize it for your requirements.

1. High yield strength, outstanding structural bearing capacity
   The minimum yield strength of S350GD is 350 MPa, and the tensile strength is not less than 420 MPa. While ensuring sufficient strength, it has an elongation rate of over 16% and can meet the requirements of primary and secondary load-bearing components in lightweight steel structures. Compared to S220GD or S280GD, thinner specifications can be used under the same load conditions, which is beneficial for reducing steel consumption per unit area.
2. Good cold forming performance
   The mechanical properties and composition design of S350GD make it suitable for conventional processing techniques such as cold bending, roll forming, stamping, and shallow stretching. In actual production, S350GD within the thickness range can be stably processed into various cross-sectional profiles such as C-type, Z-type, U-shaped, etc. through cold bending forming lines, which are used for building purlins, wall beams and other components with high processing efficiency and low mold wear.
3. Excellent corrosion resistance protection
   S350GD hot-dip galvanized products form metallurgical bonded zinc or alloy coatings on the surface through hot-dip galvanizing process. The zinc layer not only serves as a physical barrier to isolate corrosive media, but also acts as a sacrificial anode to preferentially corrode when the coating is damaged, protecting the substrate steel. In general outdoor environments, the service life of S350GD hot-dip galvanized steel with Z180 coating can reach more than 20 years.
4. Good welding performance
   The low-carbon design of S350GD (C ≤ 0.20%) allows it to be connected using conventional welding processes such as resistance spot welding and MAG/MIG welding, making it suitable for manufacturing processes such as purlin splicing and component assembly.

S350GD galvanized steel coil is widely used in the following industries due to its high strength, good cold formability, and high cost-effectiveness:

S350GD is one of the most frequently used grades in lightweight thin-walled steel structures. Cold-rolled S350GD galvanized steel coil is commonly used in the manufacturing of cold-formed section profiles, with main application scenarios including:

Roof purlins and wall beams: roof and wall support structures for industrial plants, storage facilities, commercial buildings, and residential buildings.

Light steel keel: non load bearing partition walls and ceiling frames for residential and office buildings.

Load bearing truss and substructure: auxiliary load-bearing components in multi story or single story buildings.

In the field of new energy, S350GD galvanized steel coil is one of the commonly used materials for photovoltaic bracket systems. It can be cold-formed into C-shaped steel, U-shaped steel, Z-shaped steel, as well as specialized connectors and brackets for photovoltaic engineering projects.

S350GD galvanized steel coil can be used as a color coated substrate, which is processed by roll forming to produce metal roof panels and wall panels. Its good flatness and coating adhesion provide favorable conditions for the uniform adhesion of subsequent colored coatings, and are widely used in the enclosure structures of industrial buildings, sports venues, logistics warehouses, and commercial facilities.

S350GD galvanized steel coil can be used in products such as highway waveform beam guardrails, anti-collision isolation belts, sound barriers, traffic sign pole structures, and scaffold pipes to meet long-term outdoor anti-corrosion and load-bearing requirements.

The S350GD galvanized steel coils can also be used in agricultural facilities such as greenhouse skeletons, livestock farm fences, and agricultural machinery equipment casings, taking advantage of their weather resistance and processing convenience.

Founded in 2011, Wanzhi Steel is an integrated industrial and trading company. With an annual production capacity exceeding 600,000 tons, its business spans more than 120 countries and regions worldwide.

Wanzhi’s products are highly recognized by customers. Bolivian customer stated, “Your packaging standards and delivery time exceeded expectations.” Russian customer commented, “The products were unexpectedly good, and the service throughout the process was also very pleasant.” Brazilian customer specifically mentioned, “The surface flatness meets the standards; you are a trusted long-term partner.” Cameroonian customer reported that the products “performed excellently and were stable and reliable” in humid climates. Yemeni customer stated, “It’s hard to find a factory like yours that offers both service and high quality.”

Regarding certifications, Wanzhi holds multiple international certifications including ISO 9001, ISO 14001, CE, SGS, TÜV, and SNI, and operates its own quality inspection laboratory. Over 70% of Wanzhi’s clients maintain long-term partnerships, with some collaborations exceeding 20 times. This reflects not just a single transaction, but a continuous and stable accumulation of trust.

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