As a supplier of 4140 plates, we can supply you 4140 steel plate in different tolerance as below:

  1. Black surface 4140 plate: the thickness tolerance usually goes +/-1mm while the width is usually 2000-2300, mostly pieces are 2200-2250mm. We can cut to length for you.
  2. For 4140 group flat bar: we can do machining for you according to given specification or technical requirements. With our CNC machine, we can do +/-0.05mm and 0.01mm after polishing machining.

So, for tolerance for 4140 plate, we can almost meet your different requirements. Please feel free to contact us by email jeremy@otaisteel.com or whatsapp +8613610149979 anytime.