Press Brake Forming Force Chart for Multiple Bend Shapes
Multiply Metal Thickness by the value given to obtain an estimate of the Tons per Linear Foot
required to bend the given shape in mild steel with a Tensile Strength of 60,000 psi.

(Bend radii are equal to the metal thickness unless otherwise indicated.)

Shape Description AirForm Bottoming
Vee Die 60 150
Wiping ---- 250
Offset 150 300/600
Mt'l. Thk.
Offset
300 600
Channel 225 300
Vee Die 200 600
W Die 300 600
Open Hat
Channel
300 450
Sq. Hat
Channel
---- 600
Preform
Curl
---- 300
Preform
Curl
---- 200
Close Curl ---- 300
Radius ---- 180/300
Forming Considerations
AirForm vs. Bottoming
Large Radii,
Angle Variation,
Concave or Convex Sides
Mat'l Thk Radii,
Min Angle Variation,
Maintain Flatness

 

Note: Bending forces required for other metals can be estimated using the chart above and
multiplying the estimated force by the appropriate adjustment shown in the table below...

Material Multiplier
Stainless Steel...18-8 Annealed Type 304 1.55
Aluminum...3303-H14 (½ Hard) .35
Aluminum...5052-H34 (½ Hard) .65
Aluminum...6061-T64 .75
Brass...(Soft) .50
Brass...70/30 (½ Hard) 1.10
Chrome Molybdenum 2.00