Stainless Steel Flat Bar: Sizes, Grades & Supplier Guide

Stainless steel flat bar: A Practical Buying Guide

Looking for a reliable stainless steel flat bar supplier? Huaxiao Stainless keeps 100,000 tons of inventory, ships in 15 days, and is certified to ISO/TS16949. Before you request a quote, here is what actually matters when specifying and sourcing stainless steel flat bar.

Why Choose Stainless Steel Flat Bar

Stainless steel flat bar is the rectangular-section workhorse for brackets, frames, trim, base shoes and machined parts that need a flat, true face in two dimensions. Cut from plate or rolled true, it gives you a precise width and thickness without grinding a plate edge, and pairs stainless corrosion resistance with a surface ready to polish or brush for visible architecture.

Specify 304 for indoor and architectural use, 316L for coastal or chloride service, and 430 if you need a magnetic, lower-cost ferritic bar for non-corrosive indoor trim. Flat bar is the most versatile bar profile because any width and thickness combination is easy to stock or cut.

Specifications, Sizes & Surface Condition

We supply flat bar to ASTM A276 / A484 and EN 10058. Width runs 10 mm to 150 mm, thickness 2 mm to 30 mm, length 6 m standard or cut to order. Available hot-rolled, cold-drawn (tighter tolerance, smoother), or laser-cut from strip for thin sections.

• Form: hot-rolled, cold-drawn, or sheared from plate
• Surface: mill finish, pickled, brushed, or polished to Ra 0.4 for trim
• Tolerance: per A484 for hot-rolled; h11/h12 for cold-drawn
• Also stocked: stainless round bar, square bar, angle and channel

Typical 304 properties: tensile 515 MPa min, yield 205 MPa min, elongation 40% min.

Stainless Steel Flat Bar Price Factors

The stainless steel flat bar price per kg is set by grade first (316L costs 25-40% more than 304 for molybdenum; 430 is cheaper than 304), then by width and thickness, and by finish. Cold-drawn and polished bar carry a premium over hot-rolled, and cut-to-length adds per-cut charges.

• Grade: 430 / 304 / 304L for architecture, 316L for marine
• Section: wide or thick sections cost more to roll
• Length: cut-to-length minimizes offcuts but adds handling

Tell us the width, thickness and finish and we will quote the most economical stock length to reduce scrap.

Common Applications

Flat bar is everywhere structural stainless is used: equipment and machine frames, handrail base shoes and balustrade brackets, architectural trims and reveals, shelving and racking, marine fittings, structural ties, and the flat members behind clad panels. Its two-flat-face geometry makes it the fastest way to build a precise right-angle or in-plane joint.

How to Choose a Reliable Supplier

Check three things: width and thickness tolerance per A484, straightness (no bow or twist), and surface quality on visible sections, plus the mill cert for the grade you ordered. A reliable stainless steel flat bar supplier provides the cert and a finish sample before you commit.

Huaxiao Stainless maintains 100,000 tons of stainless stock, ships within 15 days, and holds ISO/TS16949 certification with full heat traceability from mill to your dock.

Frequently Asked Questions About Stainless steel flat bar

Get a Quote for Stainless steel flat bar

Stainless steel flat bar in stock: 100,000 tons available, 15-day delivery, certified to ISO/TS16949. Browse our stainless steel flat bar product page or contact us for a quote to get a competitive price today.