Coated Metals

Tin Plate Temper Designations - Temper designations as applied to Tin Mill products are diametrically opposite to those used to indicate the degree of hardness for Cold Rolled Strip and Sheet steels. To illustrate. #1 Temper (T-1) in the Tin Mill numbering system indicates a Dead Soft condition, whereas #1 Temper as concerns C. R. Strip and Sheet Steel indicates a Full Hard Rolled Condition.

For Reference Only - To avoid confusion specify Rockwell hardness

Temper	Aim Rockwell 30 -T Scale	Characteristics
T1	46 - 52	Soft for Drawing
T-2	50 - 56	For Moderate Drawing - Some Stiffness Required
T-3	54 - 60	Shallow Drawing for General Purpose with Fair Degree of Stiffness
T-4	58 - 64	For General Purpose with Increased Stiffness
T-5	62 - 68	Rephosphorized Steel- Stiffness to resist buckling
T-5 CA TU	62 - 68	Continuous Anneal Not Rephosphorized
T-6	67 - 73	Rephosphorized Steel - for great stiffness
T-6 CA	67 - 73	Continuous Anneal Rephosphorized for Great Stiffness