HUYI METAL is the world's premier inventor, developer and producer of nickel and cobalt alloys, with a product portfolio of more than 100 alloy components, forging products and welding consumables, more than 80 percent of which were invented in our own laboratories. All of our alloys are designed to help redefine what is possible in the energy and industrial sectors.

Bulb Flat Steel

Creating the World's High-Performance Alloys.
HUYI METAL is the world leader in the invention, production and supply of high-nickel alloys for critical engineering.

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Description
Characteristics
Machining Data

Steel Grades

Standard OrganizationCommon Steel Grades
ASTMASTM A131
AISI- (Follows ASTM grades)
GBQ235, Q345
JISSS400, SM490
DINDIN17100 ST37-2, ST52-3
ENEN10025 S235JR, S355JR

(Please contact us for standards and steel grades not mentioned)


Advantages as a Steel Supplier

Wide Product Range:Offering a comprehensive range of steel products, from structural steels, tool steels, stainless steels, to specialty grades, ensuring customers find what they need.

Quality Assurance:Implementing rigorous quality control processes and adhering to international standards to ensure the steel supplied is of the highest quality.

Competitive Pricing:Leveraging economies of scale, efficient processes, and strategic partnerships to provide competitive pricing to customers.

Experienced Staff:Possessing a knowledgeable and experienced team capable of providing expert advice, technical support, and solutions tailored to the client's requirements.

Fast Delivery: Having a well-stocked inventory and efficient logistics capabilities to ensure timely delivery, even for bulk or urgent orders.

Customization Capabilities:Offering services like cutting, bending, welding, or other fabrication processes tailored to customers' specific needs.

Sustainability:Adopting eco-friendly practices and ensuring that steel production and supply align with sustainability goals, reducing environmental impact.

Strong Supplier Relationships:Maintaining robust relationships with leading steel mills and manufacturers, ensuring consistent supply and access to the latest innovations in steel.

Technology Integration:Utilizing modern technology for inventory management, order processing, and customer communication to streamline operations and enhance the customer experience.

Global Reach: Having the infrastructure and network to supply steel products to customers across different regions or even internationally.

After-sales Support:Providing excellent after-sales service, addressing any concerns, and ensuring customer satisfaction long after the initial purchase.

Research & Development: Continually investing in R&D to understand market trends, new steel applications, and emerging technologies in the steel industry.

Training & Development:Regularly training staff to stay updated with the latest industry standards, technologies, and best practices.

Transparency: Keeping customers informed about pricing, product availability, delivery times, and any other factors that might affect their purchase decisions.

Safety Focus: Ensuring all operations prioritize safety, reducing risks for both employees and customers.


Application Areas

Shipbuilding: Primarily used in the construction of hulls due to its good welding properties and resistance to buckling.

Bridge Construction: Utilized for some types of construction where the flat bulb steel provides longitudinal strength and stiffening.

Architectural and Structural Applications: Selected for its aesthetic and functional properties in exposed structures.

Offshore Construction: For the fabrication of offshore structures and the reinforcement of decks.

General Fabrication: Used in various fabrications that require an efficient profile for load-bearing and reinforcement purposes.

 

Common Dimensions

Bulb flats come in a range of sizes with the breadth and thickness tailored to the specific needs of the application. The dimensions are characterized by:

Width: Ranging from 80 mm to 430 mm.

Thickness: Typically between 5 mm and 25 mm.

Length: Standard lengths are usually based on the requirements of the shipbuilding industry, with custom lengths available.

Processing Technology

Rolling: Hot-rolled from slab or billet steel into the specific bulbous shape.

Cooling: Controlled cooling processes to achieve the desired mechanical properties.

Straightening: The bulb flats are straightened after rolling.

Cutting: Cut to the required length using shears or saws.

Surface Treatment: Surfaces are treated, often including shot blasting and priming, to protect against corrosion and prepare for welding.

Inspection: Dimensional checks and quality inspections are conducted to ensure compliance with standards.

Marking: Steel is marked for traceability and quality assurance.


Physical Properties

PropertyASTM A131 Grade AASTM A131 Grade AH36
Tensile Strength (MPa)400–490490–620
Yield Strength (MPa)235 min355 min
Elongation (%)22 min21 min


Chemical Composition

ElementComposition Range (%) (Grade A)Composition Range (%) (Grade AH36)
Carbon (C)0.21 max0.18 max
Manganese (Mn)2.5×C min, 0.60 max0.90–1.60
Silicon (Si)-0.10–0.50
Phosphorus (P)0.035 max0.035 max
Sulfur (S)0.035 max0.035 max

The specific chemical and physical properties for bulb flat steel will vary based on the grade of steel and the classification society's standards. It's important to note that each shipbuilding project may have unique requirements, and therefore, material specifications would be provided in more detail in the technical documents or standards provided by these societies.


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