Carbon Steel Plate SAC 350 1/2"

A carbon steel plate SAC 350 1/2"(12.70 mm) is ahot rolled thick plate, manufactured byUsiminaswith cutting-edge national technology. Classified asweathering steel, SAC 350 offers high mechanical resistance and exceptional protection against atmospheric corrosion, thanks to the formation of a passive layer of oxides — known as “patina” — which acts as a natural barrier against aggressive environmental agents.

Technical description of the SAC 350 1/2" plate

With nominal thickness of12.70 mm, theSAC 350 plateIt is a low-alloy, high-strength structural steel, specially developed for outdoor applications exposed to the elements. Its weathering behavior reduces the need for painting and maintenance, making it widely used in metal structures, industrial equipment, and long-life architectural projects.

Mechanical properties and chemical composition

• Standard:USI SAC 350 – Usiminas (weathering according to EN 10025-5 S355J2W / ASTM A588)
• Nominal thickness:1/2" (12.70 mm)
• Yield strength (Fy):≥ 345 MPa
• Tensile strength (Fu):470 to 630 MPa
• Minimum stretch:20%
• Modulus of elasticity:200 GPa
• Density:7.85 g/cm³
• Typical chemical composition (%): C ≤ 0.12 | Mn 0.20–1.50 | Si ≤ 0.50 | P ≤ 0.04 | S ≤ 0.04 | Cu 0.25–0.55 | Cr 0.40–0.65 | Ni ≤ 0.65

Features and benefits of SAC 350 weathering steel

• Resistance to atmospheric corrosion:The surface patina reduces the penetration of oxygen and moisture, eliminating the need for painting in many applications.
• High mechanical strength:ideal for long-lasting structures exposed to the environment.
• Low maintenance cost:less need for repainting and periodic inspections.
• Excellent weldability and formability:compatible with the main cutting, bending and welding processes.
• Differentiated aesthetics:the natural reddish tone of the patina gives it a modern and industrial architectural appearance.

Applications of SAC 350 1/2" sheet

A SAC 350 steel plateIt is widely used in segments that demand durability and resistance to aggressive environments:

• Metal bridges, walkways and viaducts
• Exposed industrial and architectural structures
• Platforms and structuresoffshore
• Transmission towers and wind turbine bases
• Mining and transportation equipment
• Power plants, steel mills, and pulp and paper mills
• Tanks, silos and rural structures

Improvements and customization

A PurchaseprovidesSAC 350 platesin custom cutting, with industrial servicesCNC plasma, oxyfuel, bending, chamfering, trimming and calendering. All parts are delivered with full traceability and technical reports in accordance with national and international standards.

Quality control and certification

As SAC 350 steel sheetshaveUsiminas quality and traceability certification, meeting the mechanical performance and chemical composition requirements set forth in the standard. Each batch is accompanied by a certificate of inspection and metallurgical analysis.

Why choose Compraço

• National distribution with fast deadlines;
• Large stock of weathering and structural sheets;
• Specialized technical assistance in special steels;
• Original plant certificates and full traceability;
• Excellent value for money and commercial technical support.

Frequently asked questions

What does weathering steel mean?

The term "patinable" refers to steel's ability to form a protective oxide layer (patina) that prevents corrosion. This layer naturally stabilizes with exposure to air and moisture, eliminating the need for painting in many outdoor applications.

Can SAC 350 sheet be welded and bent?

Yes. TheSAC 350 steelIt has excellent weldability and can be bent, cut or chamfered without loss of mechanical properties, as long as good boilermaking and welding practices are observed.

Do you do custom cutting?

Yes. APurchaseprovides customized supplies according to the project, with CNC precision and high-standard industrial finishing.

Search carbon steel plate SAC 350 1/2"(12.70 mm) with certified quality and ready for delivery?Talk toPurchase— a national reference in weathering and structural steel — and receive specialized technical support and exclusive conditions for your project.