(1) Allowable deviation in size: divided into high precision level and ordinary level.
The dimensional deviation of the strip should meet the requirements of GB / T3880.3. When a high-precision grade is required for a certain size deviation, it should be specified in the contract, and the unmarked ones are supplied at the ordinary grade.
(2) Tensile strength: the maximum tensile force that the sample unit area can withstand. Tension / area Pa = N / mm2 MegaPa = Pa * 106
(3) Hardness: the maximum pressure that the sample unit can withstand. Pressure / Surface area (round surface) Universal fabric hardness (HB)
(4) Elongation: The maximum extension length measured after the sample unit is broken.
