1/8" A36 Steel Square Plate with Radius Corners – Select Size

1/8" A36 Steel Square Plates with Radius Corners – Precision Cut for Fabrication & Industrial Applications

Our 1/8" thick A36 steel square plates with radius corners are precision CNC plasma cut from premium ASTM A36 low carbon steel and are available in sizes from 4" × 4" to 30" × 30". The smooth rounded corners provide a finished appearance, improved handling, and reduced sharp edges, making these plates ideal for fabrication, mounting, structural reinforcement, machinery, trailers, decorative projects, and custom applications.

Each plate is cut in-house with clean, weld-ready edges and a raw mill finish, ready for welding, machining, drilling, painting, or powder coating.

Whether you're building equipment, repairing machinery, or fabricating custom components, our radius corner steel plates deliver the quality and durability you expect from American-made steel.

Features

• Premium ASTM A36 Low Carbon Steel
• 1/8" (0.125") Thick
• Radius (Rounded) Corners
• Square Sizes from 4" × 4" to 30" × 30"
• Precision CNC Plasma Cut
• Clean, Weld-Ready Edges
• Raw Mill Finish
• Excellent Weldability
• Easy to Drill and Machine
• Made in the USA
• Always Fast & Free Shipping
• Ships in 1–5 Business Days

Specifications

Material: ASTM A36 Low Carbon Steel

Thickness: 1/8" (0.125")

Shape: Square with Radius Corners

Available Sizes: 4" × 4" through 30" × 30"

Manufacturing Process: CNC Plasma Cut

Dimensional Tolerance: ±0.025"

Finish: Raw, Uncoated Steel

Country of Origin: USA

Common Uses

• Mounting Plates
• Base Plates
• Trailer Fabrication
• Structural Reinforcement
• Equipment Repair
• Decorative Metal Projects
• Agricultural Equipment
• Machine Components
• Industrial Fabrication
• DIY Metal Projects

Why Buy From JWM Metal Supply?

• Precision Cut in Kansas
• Premium American Steel
• No Minimum Order
• Fast Turnaround
• Always Fast & Free Shipping
• Ships in 1–5 Business Days
• Bulk Pricing Available
• Family-Owned Fabrication Shop

Frequently Asked Questions

Why choose radius corners?

Rounded corners improve safety, reduce sharp edges, provide a cleaner finished appearance, and are ideal for projects where easier handling and aesthetics are important.

Can these plates be welded?

Yes. ASTM A36 low carbon steel offers excellent weldability using MIG, TIG, or Stick welding.

Can I drill or machine these plates?

Absolutely. A36 steel machines and drills easily using standard metalworking tools.

Will my plate have mill scale?

Yes. Plates are supplied with a raw mill finish and may contain light mill scale, scratches, or surface discoloration typical of carbon steel.