Product Overview
Gnee Steel supplies ASME SA588 / SA588M Grade C carbon and low-alloy high-strength steel sheets, designed for structural applications requiring high strength, excellent toughness, and superior atmospheric corrosion resistance.
These sheets are widely used in bridge construction, highway infrastructure, heavy engineering, and other structural projects where reliability and durability are critical.
Chemical Composition
| Element | Composition (wt%) | Notes |
|---|---|---|
| C (Carbon) | ≤ 0.15 | Ensures good weldability and toughness |
| Mn (Manganese) | 0.8 – 1.35 | Improves strength and hardenability |
| P (Phosphorus) | ≤ 0.04 | Low content prevents embrittlement |
| S (Sulfur) | ≤ 0.05 | Minimizes cracking risk |
| Si (Silicon) | 0.15 – 0.40 | Acts as deoxidizer and improves strength |
| Cu (Copper) | 0.20 – 0.50 | Enhances atmospheric corrosion resistance |
| Ni (Nickel) | 0.25 – 0.50 | Improves low-temperature toughness |
| Cr (Chromium) | 0.3 – 0.50 | Increases corrosion resistance and strength |
| V (Vanadium) | 0.01 – 0.10 | Microalloying element for grain refinement |
Insight: The combination of low carbon and carefully controlled alloying elements ensures excellent weldability, high yield strength, and enhanced toughness even in demanding environments.
Mechanical Properties
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Charpy V-Notch Impact Test |
|---|---|---|---|---|
| 5 < t ≤ 300 | ≥ 345 | ≥ 485 | ≥ 18 | Optional, per project requirement |
Compared with ordinary structural steel, SA588 Grade C offers approximately 38% higher yield strength, allowing for lighter structures without compromising safety.
Applications
Bridge construction: girders, beams, and support structures
Highway infrastructure: guardrails, overpasses, and retaining walls
Heavy engineering projects: industrial frameworks, towers, and machinery bases
Other civil engineering applications: water pipes, tanks, and pressure vessels
Case Study: Using SA588 Grade C steel in bridge construction reduces maintenance costs by 30% compared with mild steel, thanks to its natural atmospheric corrosion resistance.
Additional Conditions and Processing Options
Heat Treatment: N (Normalized), Q+T (Quenched & Tempered), TMCP (Thermo-Mechanical Control Process)
Testing & Certification: UT (Ultrasonic Testing), Charpy V-Notch, Z-Direction Test (Z15, Z25, Z35), Third-Party Test (e.g., SGS)
Surface Treatments: Coated, Shot Blasted, Painted
Rolling: AR (As Hot Rolled Only)
These options ensure that each coil meets project-specific requirements, from mechanical performance to surface finish.
Logistics and Supply
MOQ: 1 Piece
Monthly Supply: 5,000 MT
Delivery Time: 30–50 days (7 days for stock goods)
Packaging: Standard seaworthy export packing or customized
Loading Ports: Shanghai, Tianjin, Qingdao
Benefit: Our strong supply chain guarantees timely delivery and consistent quality for large-scale projects.
