A588 Grade C steel plate is a high-strength, low-alloy structural steel with a minimum yield strength of 345 MPa up to 100 mm thickness. When properly exposed to the atmosphere, it can be used in the bare condition for a wide range of structural and outdoor applications.
Our Gnee can produce A588 Grade C steel plate up to 200 mm thickness.
Specifications
Thickness: 6 mm – 200 mm
Width: 1500 mm – 4050 mm
Length: 3000 mm – 15000 mm
Supplementary Technology / Certifications: HIC Test | NACE MR0175 | Z15 | Z25 | Z35 | S2 | S3 | S5 | S6 | S8 | S18 | S30
Chemical Composition (Max %)
| Element | C | Si | Mn | P | S | Ni | Nb | Cu | Cr | Mo | N | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max (%) | 0.15 | 0.15–0.40 | 0.80–1.35 | 0.04 | 0.05 | 0.20–0.50 | – | 0.20–0.50 | 0.30–0.50 | … | 0.010 | 0.02–0.10 |
Carbon Equivalent (Ceq) Formula:
Ceq=C+Mn6+Cr+Mo+V5+Ni+Cu15%Ceq = C + \frac{Mn}{6} + \frac{Cr+Mo+V}{5} + \frac{Ni+Cu}{15} \%Ceq=C+6Mn+5Cr+Mo+V+15Ni+Cu%
Mechanical Properties
| Thickness (mm) | Tensile Strength (MPa) | Yield Strength, min (MPa) | Elongation, min (%) |
|---|---|---|---|
| ≤100 | 485 | 345 | 21 |
| 100–125 | 460 | 315 | 18 |
| 125–200 | 435 | 290 | 18 |
Applications & Advantages
Structural Projects: Bridges, buildings, and heavy-duty frameworks requiring high strength (485–435 MPa tensile strength depending on thickness) and yield strength ≥290–345 MPa. Suitable for supporting loads exceeding 50 tons per beam, ensuring structural safety in demanding conditions.
Outdoor & Architectural Use: Retaining walls, facades, and infrastructure exposed to harsh weather. ASTM A588 Grade C steel can resist atmospheric corrosion with material loss <0.02 mm per year, even in marine or industrial environments, making it ideal for long-term outdoor applications.
Long-Term Durability: Resistant to atmospheric corrosion, suitable for 50+ years of service life in outdoor environments without major structural degradation. Studies show that the self-protecting rust layer stabilizes within 1–3 years and continues to protect the steel for decades.
Cost Efficiency: Self-protecting rust layer eliminates the need for painting, reducing maintenance costs by 30–40% over conventional carbon steel. Over the lifetime of a structure, using ASTM A588 Grade C can save thousands of dollars per ton in maintenance and repainting costs.
