Steel Square Bar Supplier
Square Bar for Fabrication, Machining, and Industrial Use
Shops and industrial operations sourcing steel square bars need reliable stock and grade availability to keep projects on schedule. As a trusted steel square bar supplier, Service Steel & Pipe maintains a stable inventory of stainless steel square bars for a wide range of applications, including parts, frames, supports, repairs, and custom fabrication.
If you have questions about grade selection or sizing, our team can help you work through the specifications of your project before you order.
Stainless Steel Square Bar in 304 and Other Grades
Service Steel & Pipe offers 304 stainless steel square bar in sizes from 1/8" through 4", with other grades available upon request. Weight per foot and approximate 12-foot length weights are listed for each size in the catalog. For current availability, lead times, or help selecting the right option for your application, give us a call or contact us online.
Common Uses for Stainless Steel Square Bar
Stainless steel square bars are used across fabrication and manufacturing for components that need strength, clean lines, and dependable corrosion resistance. They are a common choice for both production work and custom projects where durability and machinability matter, such as:
- Machine parts and shafts
- Pins and spacers
- Brackets and supports
- Frames and welded assemblies
- Equipment repairs and replacement components
- Food processing equipment
- Marine hardware
- Architectural metalwork
- Shop fixtures and custom fabrication
Stainless steel square bars can be machined and welded without special preparation, making them ideal for high-volume production sites and projects that require one-off work.
304 Stainless Steel Square Bar
304 stainless steel square bar is one of the most commonly specified grades for general fabrication and industrial work. It welds consistently and machines well, which makes it a practical choice for both production work and applications with tight tolerances.
It is the standard specification for components used in moderate-corrosion environments, such as industrial facilities, machine shops, and fabrication. This material is highly recommended for equipment panels and fabricated assemblies where surface condition and appearance are part of the specification, including environments that require regular cleaning or washdown.
Proper grade selection often comes down to the application and to what the part will be exposed to once in service. In environments with higher chloride levels or where repeated chemical exposure is expected, a higher-grade stainless steel may be the better choice. Our team can help you confirm the right option before you order.
Stainless Steel Square Bar Size and Weight Chart
Material weight affects freight costs, shop-floor handling, and order planning. The size and weight data below come directly from our catalog and cover the full range of stainless square bar dimensions available.
| Square Bar Size | Weight Per Foot | Approx. Weight per 12 Ft. Length |
|---|---|---|
| 1/8" | 0.053 lbs. | 0.64 lbs. |
| 3/16" | 0.120 lbs. | 1.44 lbs. |
| 1/4" | 0.213 lbs. | 2.56 lbs. |
| 5/16" | 0.332 lbs. | 3.98 lbs. |
| 3/8" | 0.478 lbs. | 5.74 lbs. |
| 1/2" | 0.850 lbs. | 10.20 lbs. |
| 5/8" | 1.328 lbs. | 15.94 lbs. |
| 3/4" | 1.913 lbs. | 22.96 lbs. |
| 1" | 3.400 lbs. | 40.80 lbs. |
| 1-1/4" | 5.313 lbs. | 63.76 lbs. |
| 1-1/2" | 7.650 lbs. | 91.80 lbs. |
| 2" | 13.600 lbs. | 163.20 lbs. |
| 2-1/2" | 21.250 lbs. | 255.00 lbs. |
| 3" | 30.600 lbs. | 367.20 lbs. |
| 3-1/2" | 41.650 lbs. | 499.80 lbs. |
| 4" | 54.400 lbs. | 652.80 lbs. |
How to Choose the Right Steel Square Bar
Choosing the right steel square bar comes down to a few key factors:
- Grade: The grade affects both fabrication requirements and how the finished part performs in service. For most general fabrication work, 304 stainless is the standard choice. In many shop environments, it performs well against moisture and mild chemical exposure and can be cut, drilled, and welded with standard fabrication equipment.
- Bar Size: Size affects how the material performs in the finished assembly. Smaller square bars, such as 1/4" through 3/4", are often used for lighter machined parts, spacers, and brackets. Larger sizes, beginning around 1" and up, are better suited to frames, supports, and applications where added rigidity is needed.
- Length Requirements: Material is typically available in standard mill lengths, as listed in the catalog. If your project requires cut-to-length pieces, include those dimensions with your quote request so the order arrives sized for your application.
- Order Weight: Total order weight can have a direct impact on freight and handling costs, especially for larger quantities. Use the size chart above to estimate weight and help plan for shipping.
Steel Square Bar vs. Stainless Steel Square Bar
Before selecting dimensions or requesting pricing, it is important to confirm whether the application calls for carbon steel or stainless steel square bar. That decision sets the baseline for durability, appearance, and long-term value:
- A carbon steel square bar is better suited for applications where structural strength is the priority and corrosion resistance is not a spec requirement. Most fabricators use it for frames, braces, supports, and structural hardware that will be painted or coated before installation.
- Stainless steel square bars are the right choice when corrosion resistance is required. The most common examples are for food processing, marine, and sanitary environments. It is also the preferred material when the finished appearance is specified.
Material selection should be driven by application, not convenience. When reviewing quotes, make sure the recommendation aligns with the corrosion demands, finish requirements, and structural needs of the job rather than simply what is easiest to source.
A Square Bar Supplier for Fabricators, Contractors, and Industrial Buyers
Service Steel & Pipe provides current pricing, grade confirmation, and availability details when you place an order. We have specialists who can answer questions on grade selection and sizing. This information can be made available to fabricators and contractors before placing their orders.
Because many projects require more than square bar alone, we also stock steel, stainless steel, pipe, plate, and structural materials that can be quoted together in the same request.
That gives customers a more efficient way to source related materials without splitting the order across multiple vendors. It also helps simplify delivery and inventory planning by keeping more of the order together.
Square Bar and Related Steel Products
Square bar is often ordered alongside other materials needed for the same job, especially when a project includes fabrication, structural support, or assembly work. Keeping those items on one quote can make purchasing more efficient and help streamline delivery.
Related products available from Service Steel & Pipe include:
- Stainless steel products
- Steel bar products
- Round bar
- Flat bar
- Steel plate
- Steel sheet
- Structural steel
- Pipe and tubing
Request a steel quote or contact Service Steel & Pipe to discuss your full material requirements.
Frequently Asked Questions
304 stainless steel square bars are stocked in the catalog. Contact our team to confirm what is currently available.
304 stainless steel machines consistently and maintains a clean surface finish in applications with moderate corrosion exposure. It is commonly specified for food processing equipment, architectural metalwork, and fabricated components where durability and surface condition are part of the spec.
The catalog covers stainless steel square bar from 1/8" through 4". Weight per foot and approximate 12-foot length weights are listed alongside each size.
Carbon-steel square bars are used for structural fabrication when the finished part will be coated or used in a controlled environment. Stainless is the better fit when the application involves direct moisture or chemical exposure, or when sanitary standards apply.
To request a quote, send the grade, size, length, and quantity along with your delivery location and timeline. If drawings or specifications are available, include those with the request.