1/4" A36 Steel Square Plate with Radius Corners – Select Size

1/4" Steel Square Plates with Radius Corners – Precision Cut & Ready to Use

Our 1/4" thick 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". Each plate features smooth rounded corners for a cleaner appearance, improved safety, and easier handling compared to sharp-cornered plates.

These plates are ideal for trailer fabrication, mounting plates, equipment repairs, welding projects, decorative applications, agricultural equipment, and countless custom fabrication jobs.

Every plate is precision cut with clean, weld-ready edges and a raw mill finish, making them ready for welding, machining, drilling, or painting.

Features

• Premium ASTM A36 Low Carbon Steel
• 1/4" (0.250") 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
• Made in the USA
• Free Shipping
• Ships in 1–5 Business Days

Specifications

Material: ASTM A36 Low Carbon Steel

Thickness: 1/4" (0.250")

Shape: Square with Radius Corners

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

Corner Style: Rounded Radius Corners

Manufacturing Process: CNC Plasma Cut

Tolerance: ±0.025"

Finish: Raw Mill Finish

Country of Origin: USA

Common Uses

• Mounting Plates
• Base Plates
• Trailer Fabrication
• Equipment Repair
• Decorative Projects
• Agricultural Equipment
• Machine Mounts
• Welding Projects
• Industrial Fabrication
• DIY Metal Projects

Why Buy From JWM Metal Supply?

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

Frequently Asked Questions

Why choose radius corners?

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

Are these plates painted?

No. They are supplied with a raw mill finish.

Our 1/4" thick 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". Each plate features smooth rounded corners for a cleaner appearance, improved safety, and easier handling compared to sharp-cornered plates.

These plates are ideal for trailer fabrication, mounting plates, equipment repairs, welding projects, decorative applications, agricultural equipment, and countless custom fabrication jobs.

Every plate is precision cut with clean, weld-ready edges and a raw mill finish, making them ready for welding, machining, drilling, or painting.

Features

• Premium ASTM A36 Low Carbon Steel
• 1/4" (0.250") 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
• Made in the USA
• Free Shipping
• Ships in 1–5 Business Days

Specifications

Material: ASTM A36 Low Carbon Steel

Thickness: 1/4" (0.250")

Shape: Square with Radius Corners

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

Corner Style: Rounded Radius Corners

Manufacturing Process: CNC Plasma Cut

Tolerance: ±0.025"

Finish: Raw Mill Finish

Country of Origin: USA

Common Uses

• Mounting Plates
• Base Plates
• Trailer Fabrication
• Equipment Repair
• Decorative Projects
• Agricultural Equipment
• Machine Mounts
• Welding Projects
• Industrial Fabrication
• DIY Metal Projects

Why Buy From JWM Metal Supply?

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

Frequently Asked Questions

Why choose radius corners?

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

Are these plates painted?

No. They are supplied with a raw mill finish.