Hot Rolled Steel Flat Bar - 4-1/2 Inch X 5/8 Inch
A36 Hot Rolled Steel Flat Bar - 4-1/2" x 5/8"
This 4-1/2" x 5/8" hot rolled flat bar is an economical, general-purpose structural steel. Certified to ASTM A36, it offers excellent weldability and good strength for fabrication and construction. Its substantial width makes it a reliable choice for supports and base plates. In stock Los Angeles.
- A36 Steel Construction
- ASTM A36 Certified
- 58,000 PSI Tensile Strength
- Excellent Weldability
A36 hot rolled steel flat bar is produced by forming steel at elevated temperatures, resulting in a product with a distinctive scaly, blue-grey mill finish and slightly rounded edges. This process makes the material easy to form and weld. Conforming to ASTM A36 specifications, it has a minimum yield strength of 36,000 PSI, making it suitable for a wide range of structural applications where high strength is not the primary requirement.
As a large-format flat bar, this 4-1/2" width provides a substantial surface area, making it ideal for machinery base plates, heavy structural connections, and column supports. Its thickness offers excellent rigidity for applications such as equipment frames, trailer components, and industrial wear strips that require durability and impact resistance.
Specifications
- Material: A36 Hot Rolled Steel
- Standards: ASTM A36
- Strength/Tensile: 58,000 - 80,000 PSI
- Dimensions: 4-1/2" Width x 5/8" Thickness x 240" Length
- Finish: Hot Rolled (Mill Finish)
- Certifications: MTR Available
Applications
- Heavy Equipment: Base plates for machinery - large width provides a stable and strong foundation.
- Structural Fabrication: Gussets and heavy brackets - excellent weldability for secure load-bearing connections.
- Transportation: Trailer frames and cross-members - good strength and durability for chassis components.
- Industrial Maintenance: Repair sections and reinforcements - versatile and economical for strengthening structures.
Target Users
Fabricators, welders, construction contractors, and maintenance teams rely on A36 flat bar for its strength, weldability, and value in structural and repair projects throughout the Los Angeles area.
Finish Options
This product comes standard with a hot rolled mill finish, characterized by a scaly, blue-grey surface. This mill scale must be removed by grinding, sandblasting, or pickling before painting or powder coating. Left unfinished, it will rust. Contact our Los Angeles sales team for custom finish inquiries, such as galvanizing or painting.
How to Measure
Flat bar is measured by its Width (A) and its Thickness (B). Use a tape measure for width and calipers for an accurate thickness measurement.
Example: To order this flat bar, specify "A36 Hot Rolled Flat Bar, 4-1/2 Inch by 5/8 Inch".
Order Checklist
- Product name and required dimensions (4-1/2" x 5/8" x 240")
- Material specification and quantity
- Confirm grade (A36) meets requirements
- Surface finish requirements (Hot Rolled)
- Certifications required (Mill Test Report)
- Special handling or delivery requirements
Quick Facts
- Product
- Hot Rolled Steel Flat Bar - 4-1/2 Inch X 5/8 Inch
- Material
- A36 Steel
- Standards
- ASTM A36
- Key Properties
- 58,000 PSI tensile, excellent weldability, good machinability
- Primary Applications
- Base plates, structural bracing, trailer frames
- Location
- Los Angeles warehouse - Same-day pickup available
Available Sizes
We stock A36 Hot Rolled Flat Bar in widths from 1/2" to 12" and thicknesses from 1/8" to 2". This 4-1/2" x 5/8" size is available for immediate pickup in Los Angeles.
Custom cutting services available.
Contact for Sizing