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steel plate drilling

Steel plate drilling is a cold cutting process that uses a drill bit to cut or enlarge small round holes in a solid workpiece. The drill bit is usually a multi-point rotary cutting tool that is pressed against the steel and rotates at thousands of revolutions per minute. This operation forces the cutting edge away from the material and removes all chips from the hole as it is drilled. The main feature of the drill hole is the sharp edge on the entrance side.

Different variables affecting time

Do you know the ideal conditions for drilling versus thermally cutting holes in steel? The time required to plasma cut a hole in mild steel is largely influenced by the thickness of the material and the size of the hole, while drilling time is largely dependent on the machinability and thickness of the material.
Both drilling and cutting are viable perforating processes and each has a range of applications where one is faster than the other. Let's go through some examples of mild steel to see the time difference between drilling and cutting holes. This can help you to prefer one or the other process depending on the specific production details.

steel plate chemical composition

Grade C Mn Si P S Cr Mo Ni N
316 Min - - - 0 - 16 2 10 -
Max 0.08 2 0.75 0.045 0.03 18 3 14 0.1
316L Min - - - - - 16 2 10 -
Max 0.03 2 0.75 0.045 0.03 18 3 14 0.1
316H Min 0.04 0.04 0 - - 16 2 10 -
max 0.1 0.1 0.75 0.045 0.03 18 3 14 -

steel plate mechanical property

Grade Tensile Str Yield Str Elong Hardness
(MPa) min 0.2% Proof (% in 50mm) min
(MPa) min Rockwell B (HR B) max Brinell (HB) max
316 515 205 40 95 217
316L 485 170 40 95 217
316H 515 205 40 95 217

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