Abrasion Resistant
Impact Resistant

Laser cut AR400 Steel for fortress-like durability

AR400 steel is designed to have excellent abrasion and impact resistance.

You’ll find it in everything from armor plating for Battlebots to bed linings for quarry dump trucks. 

Laser cut AR400 plate shines with its low maintenance costs and its through-hardness, positioning it as an economical fit for large-scale mining operations and industries with high wear risk. This steel is three times stronger than mild steel and it can take almost any punishment you throw at it.

Material Details

Advertised Thickness .250″ | 6.35mm
Gauge 8
Thickness Tolerance Positive .040″
Thickness Tolerance Negative .040″
Cutting Process Fiber Laser
Cut Tolerance .005″
Available Operations
Deburring No
Bending No
Tapping No
Powder Coating No
Hardware No
Design Considerations
Min Part Size .5″ x .75″
Max Part Size 44″ x 30″
Min Hole Size .088″
Min Bridge Size .125″
Tab and Slot Tolerance .050″
Material Composition Iron (Fe): 97
Manganese (Mn): 1.5
Silicon (Si): 0.50
Chromium (Cr): 0.45
Carbon (C): 0.20
Molybdenum (Mo): 0.050
Phosphorus (P): 0.025
Sulfur (S): 0.0050
Density 497.66
Tensile Strength (Yield)  
Shear Strength  
Shear Modulus  
Fatigue Strength  
Brinell Hardness 360 -440
Elongation at Break  
Elastic Modulus  
Poisson’s Ratio  
Thermal Conductivity  
Melting Point  
Magnetic Yes

Common Uses

  • Combat robotics armor plates
  • Sprockets/gears
  • Heavy equipment wear plates
  • Shooting targets
  • Bed liners for heavy equipment
  • And so much more!

Our laser cut AR400 is guaranteed

We guarantee awesome quality parts. If you’re not 100% happy, we’ll give you a refund or remake on the spot – no questions, no hassle.

Material Charts and Guidelines

Min/Max Part Sizes


Processing Min/Max Part Sizes


Density Guidelines


Design Guidelines


Start your first SendCutSend project today

Upload your CAD design (DXF, DWG, EPS, or AI file) and get a free instant quote on your custom laser cut parts, all delivered to your door in a matter of days.