Deep drawing presses a flat sheet blank into a die with a punch to make a seamless hollow part, such as a cup, can, housing or sink, deeper than its own diameter in many cases. Deep parts are drawn in several stages with annealing between them if needed. It needs a hydraulic or mechanical press and a die set made for the part.
Quick facts
- Typical parts
- Cups, cans, shells, housings, sinks, filter bodies
- Materials
- Deep-drawing CR steel, stainless 304, aluminium, brass, copper
- First draw ratio
- Blank diameter up to about 1.8–2 × punch diameter
- Stages
- One or more redraws for deep parts
- Tooling
- Draw die, punch and blank holder per stage
- Usually priced
- Per part plus tooling
How it is done
- A round or shaped blank is cut
- The blank holder grips the edge while the punch pushes the centre into the die
- Lubricant reduces friction and tearing
- Deep parts are redrawn in further stages, sometimes with annealing
- The rim is trimmed and the part cleaned
Materials that draw well
| Material | Drawability |
|---|---|
| Deep-drawing CR steel (IS 513 D/DD/EDD) | Very good |
| SS304 | Good, work-hardens |
| Aluminium 1100 / 3003 | Very good |
| Brass and copper | Very good |
What to send
- Part drawing or 3D model
- Material and thickness
- Annual quantity (decides tooling)
- Surface finish and any coating
- Tolerance on height, diameter and wall
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Questions
- Why do deep drawn parts tear?
- Too much draw in one stage, too little lubricant, wrong blank holder force or unsuitable material. Extra stages or better material usually fix it.
- Hydraulic or mechanical press for deep drawing?
- Hydraulic presses suit deep draws because they hold force through the whole stroke; mechanical presses are faster for shallow parts in volume.
- Can stainless steel be deep drawn?
- Yes, SS304 draws well but work-hardens, so deep parts may need annealing between draws.
The figures on this page are typical values for guidance, written by Diemeco from standard engineering practice. They are not a specification: confirm grades and properties with the relevant standard or the supplier's mill test certificate, and tolerances with your workshop. Last checked 23 October 2026.