ASTM A588 Grade A, B, C, K Plates: Your Ultimate Guide
Welcome to ASC LLP, a trusted leader in the steel industry, specializing in high-quality steel products. Our extensive product line includes the premium ASTM A588 Grade A, B, C, and K Plates, renowned for their exceptional properties and performance in various applications. In this comprehensive guide, we will explore everything you need to know about ASTM A588 Plates, including their properties, advantages, and why they are the ideal choice for your next project.
What is ASTM A588 Grade A, B, C, K Plates?
ASTM A588 is a specification for high-strength, low-alloy structural steel with improved atmospheric corrosion resistance. This steel is known for its ability to withstand harsh weather conditions and is commonly referred to as Corten Steel. The specification covers four grades: A, B, C, and K, each with unique chemical compositions and mechanical properties tailored for different applications.
ASTM A588 Gr A
- Description: ASTM A588 Grade A is the most commonly used grade. It is highly resistant to atmospheric corrosion, making it ideal for structures exposed to the elements.
- Applications: Bridges, building facades, and other structures requiring high weather resistance.
ASTM A588 Gr B
- Description: ASTM A588 Grade B offers similar properties to Grade A but with slightly different mechanical properties.
- Applications: Similar to Grade A, it is used in construction, especially where a high degree of corrosion resistance is required.
ASTM A588 Gr C
- Description: ASTM A588 Grade C has higher mechanical properties and is suitable for more demanding structural applications.
- Applications: Heavy-duty structures such as bridges and high-rise buildings.
ASTM A588 Gr K
- Description: ASTM A588 Grade K is designed for specific structural applications where a higher yield and tensile strength are needed.

Properties of ASTM A588 Plates
The properties of ASTM A588 Plates make them stand out as a preferred choice in the construction industry. Here are the key properties that define these plates:
- Corrosion Resistance: ASTM A588 Plates exhibit superior resistance to atmospheric corrosion compared to standard carbon steel. The weathering steel forms a stable rust-like appearance after exposure to weather, which acts as a protective layer.
- High Strength: These plates provide high tensile and yield strength, ensuring structural integrity and longevity in demanding applications.
- Durability: The improved durability of ASTM A588 Plates makes them ideal for long-term use in harsh environments.
- Workability: Despite their high strength, ASTM A588 Plates are relatively easy to work with, allowing for efficient fabrication and welding.
Advantages of ASTM A588 Plates
Choosing ASTM A588 Plates offers numerous advantages for your construction projects:
- Cost-Effective: The enhanced durability and low maintenance requirements of ASTM A588 Plates reduce long-term costs, making them a cost-effective choice for large-scale projects.
- Aesthetic Appeal: The unique rust-like appearance of Corten Steel Plates ASTM A588 adds an aesthetic appeal to structures, blending well with natural surroundings and modern designs.
- Sustainability: The use of weathering steel reduces the need for protective coatings and paints, contributing to environmentally friendly construction practices.
- Versatility: Available in various grades and thicknesses, ASTM A588 Plates can be tailored to meet the specific needs of different projects, from architectural structures to industrial applications.


Schedule and Size Chart
Plate Thickness (inches) | Width (inches) | Length (feet) |
1/8″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
3/16″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
1/4″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
3/8″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
1/2″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
5/8″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
3/4″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
1″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
1-1/4″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
1-1/2″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
2″ | 48″, 60″, 72″, 96″ | 8′, 10′, 12′, 20′ |
Mechanical Properties Chart
Grade | Yield Strength (ksi) | Tensile Strength (ksi) | Elongation (%) |
A | 50 | 70 | 21 |
B | 50 | 70 | 21 |
C | 50 | 70 | 21 |
K | 50 | 70 | 21 |
Specifications Chart
Standard | Specification |
ASTM A588 | High-strength, low-alloy structural steel with improved atmospheric corrosion resistance |
Dimensions | Thickness: 1/8″ to 2″, Width: up to 96″, Length: up to 20 feet |
Tolerances | As per ASTM standards |
Surface Condition | Mill finish, pickled and oiled |
Chemical Composition Chart
Element | Grade A (%) | Grade B (%) | Grade C (%) | Grade K (%) |
Carbon (C) | 0.19 max | 0.19 max | 0.19 max | 0.19 max |
Manganese (Mn) | 0.80-1.25 | 0.80-1.25 | 0.80-1.25 | 0.80-1.25 |
Phosphorus (P) | 0.04 max | 0.04 max | 0.04 max | 0.04 max |
Sulfur (S) | 0.05 max | 0.05 max | 0.05 max | 0.05 max |
Silicon (Si) | 0.30-0.65 | 0.30-0.65 | 0.30-0.65 | 0.30-0.65 |
Nickel (Ni) | 0.40 max | 0.40 max | 0.40 max | 0.40 max |
Chromium (Cr) | 0.40-0.65 | 0.40-0.65 | 0.40-0.65 | 0.40-0.65 |
Copper (Cu) | 0.20-0.40 | 0.20-0.40 | 0.20-0.40 | 0.20-0.40 |
Vanadium (V) | 0.02-0.10 | 0.02-0.10 | 0.02-0.10 | 0.02-0.10 |
Physical Properties Chart
Property | Value |
Density | 7.85 g/cm³ |
Melting Point | 1510°C (2750°F) |
Modulus of Elasticity | 200 GPa (29000 ksi) |
Thermal Conductivity | 44.5 W/m-K at 23°C (68°F) |
Electrical Resistivity | 0.000015 ohm-cm at 20°C (68°F) |
Applications Chart
Industry | Application |
Construction | Bridges, building facades, pedestrian walkways |
Architecture | Sculptures, architectural panels |
Transportation | Railway cars, shipping containers |
Industrial | Storage tanks, industrial equipment |
Marine | Offshore structures, shipbuilding |
Why Choose ASC LLP for ASTM A588 Plates?
At ASC LLP, we are committed to providing our clients with top-quality steel products. Here’s why you should choose us for your ASTM A588 Plate needs:
- Extensive Inventory: We maintain a large inventory of ASTM A588 Plates in various grades and thicknesses, ensuring that we can meet your specific requirements promptly.
- Quality Assurance: Our ASTM A588 Plates undergo rigorous quality control measures to ensure they meet the highest standards of performance and durability.
- Expertise: With years of experience in the steel industry, our team of experts can provide you with the guidance and support you need to select the right steel products for your project.
- Customer Service: We pride ourselves on our exceptional customer service, offering personalized assistance and timely delivery to ensure your complete satisfaction.
ASTM A588 Grade A, B, C, and K Plates are the premier choice for projects requiring high-strength, durable, and aesthetically pleasing steel. At ASC LLP, we offer a wide range of ASTM A588 Plates, ensuring that you have access to the best materials for your construction needs. Contact us today to learn more about our products and how we can help you achieve your project goals with the finest Corten Steel Plates ASTM A588.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A588 Plates. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
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