HI, Up to what thickness we can say this is sheet and plate ??? and how much its thickness range maximum??
Not sure give a good answer, best ways must refer to the specificied material.
Look at Definitions or Terminology will give your more information.
Example for material specification ASTM A240 - Definitions
- cold work, n—the changing of mechanical properties by work hardening.
- plate, n—material 3⁄16 in. [5.00 mm] and over in thickness and over 10 in. [250 mm] in width.
- sheet, n—material 3⁄16 in. [5.00 mm] in thickness and 24 in. [600 mm] and over in width.
- strip, n—cold-rolled material under 3⁄16 in. [5.00 mm] in thickness and under 24 in. [600 mm] in width.
First time I known.