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Hot Rolled Steel Sheet ASTM A588
3. Chemical composition and physical properties
Chemical composition (typical range, please refer to the steel mill warranty): The protective rust layer is formed by adding alloying elements such as Cu, Cr, Ni, and P. The C, S, and P contents are strictly controlled to ensure weldability and toughness.
Carbon (C): ≤ 0.19%
Manganese (Mn): 0.80-1.25%
Phosphorus (P): 0.04% max (corrosion resistant key element)
Sulfur (S): ≤ 0.05%
Silicon (Si): 0.15-0.50%
Copper (Cu): 0.25-0.40% (corrosion resistant core element)
Chromium (Cr): 0.40-0.65% (corrosion resistant core element)
Nickel (Ni): ≤ 0.50%
Vanadium (V): ≤ 0.10%
Physical and mechanical properties (ASTM A588 standard requirements)
| Performance indicators | Minimum values |
|---|---|
| Yield Strength | 345 MPa (50 ksi) |
| Tensile Strength | 485 MPa (70 ksi) |
| Elongation in 200mm | 18-21% (varies with thickness) |
4. Grades and Specifications
Common grades: A588 Grade A, A588 Grade B, A588 Grade C, A588 Grade K. Different grades have slight differences in thickness range, impact toughness requirements, and trace element control, and need to be selected according to specific design specifications and service environment.
Common thickness range: Regular inventory covers 3mm - 100mm (or expand according to customer needs), meeting various needs from light components to heavy supports.
Common width range: 1500mm, 1800mm, 2000mm, 2500mm (or slit according to customer orders).
Delivery status: Usually delivered in hot rolled state. Controlled rolling (TMCP) state can be provided upon request to further improve strength and toughness.
Applications
1. Bridge Engineering: In bridge engineering, ASTM A588 hot rolled steel plate is mainly used for auxiliary support structures and connection parts. They can withstand dynamic loads and vibration shocks and are suitable for harsh environments such as cross-sea bridges.
2. Construction: Hot rolled sheet is used in high-rise steel structure frames, curtain wall support systems and industrial plants, taking into account both strength and weather resistance.
3. Construction Machinery: Manufacture of corrosion-resistant parts such as excavators, cranes, and mining vehicles.
4. Containers and Transportation: Improve the durability of outdoor equipment such as containers and ship decks.
5. Art Architecture: Hot rolled steel sheet is used for decorative structures, combining rusty appearance with modern design.
5. Art Architecture: Hot rolled steel sheet is used for decorative structures, combining rusty appearance with modern design.
Why choose ASTM A588 hot rolled steel sheets from Lishengda?
Quality assurance, reliable traceability: strictly select cooperative steel mills, all of which are well-known large steel mills (such as Baowu, Angang, Nanjing Steel, etc., or imported Nippon Steel, Posco, JFE, etc.), to ensure that the original factory warranty is complete. Each batch of goods is strictly inspected for appearance, size, and material certification documents (third-party inspection services can be provided).
Complete specifications: A large number of hot rolled steel sheet A588 is always in stock, covering common grades (GrA/B/K), thicknesses (such as 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 40mm, 50mm...) and widths. Provide one-stop procurement to avoid multiple searches, saving time and communication costs.
Processing services, empowering customers: equipped with advanced CNC cutting equipment, providing high-precision cutting services according to drawings. Can provide supporting processing such as opening, striping, bending, punching, welding, etc. to meet your personalized component needs.
Professional team, efficient service: We have an experienced technical sales team, providing professional support such as material selection suggestions, standard interpretation, and processing technology consultation. Quickly respond to inquiries, provide quotations, and have a clear and transparent order processing process.
Flexible supply and fast logistics: According to your project needs, we can flexibly arrange small batches, multiple batches or whole order delivery. The perfect logistics network covers the world and supports sea transportation to ensure the safe and timely delivery of goods.
Cost optimization, value enhancement: Relying on large-scale procurement and efficient operation, we provide highly competitive prices. Professional material selection suggestions help you optimize the design and reduce the overall project cost from the source.
Buyer's Guide
How to choose the right ASTM A588 grade?
Mainly consider the design specification requirements, structural criticality, service environment temperature (impact toughness requirements), and required thickness range. For example, the main load-bearing components of bridges in cold regions usually use Gr.K or Gr.C, which require higher impact energy.
Does ASTM A588 hot rolled carbon steel sheet needs to be painted?
The design concept is "paint-free". However, special considerations may be required in the following situations:
High initial appearance requirements (transparent protective agents can be used for a short period of time to accelerate uniform rusting).
Long-term exposure to special environments with high humidity, salt spray, or severe industrial pollution.
Parts that may cause galvanic corrosion in contact with concrete or other metals (isolation design is required).
Direct exposure is sufficient in most standard atmospheric environments (rural, urban, industrial areas).
ASTM A588 vs Common Structural Steel
| Features | ASTM A588 (weathering steel) | ASTM A36 (plain carbon steel) | ASTM A572 Gr.50 (high strength low alloy) |
|---|---|---|---|
| Main advantages | Excellent weather resistance, no painting/low maintenance | Low cost, easy to obtain, easy to process | High strength, good weldability |
| Whether to paint (outdoor) | Usually not | Required | Required |
| Long-term maintenance cost | Very low | High (regular inspection and painting required) | High (regular inspection and painting required) |
Call to Action: Start your journey to excellence in weathering steel projects
Choosing ASTM A588 hot-rolled steel is choosing a smart building material solution for the future. It represents the perfect combination of strength, durability, beauty and sustainability. Whether you are designing a century-old bridge across a river, a cultural landmark showing industrial aesthetics, or a critical infrastructure that needs to withstand the test of wind and rain, we will be your strongest backing.
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