scope:

This International Standard applies to hot-rolled carbon steel sheet of commercial and drawing qualities.

Hot-rolled steel sheet is suitable for many applications where the presence of oxide or scale, or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where surface is of prime importance.

NOTE 1 Hot-rolled sheet up to but not including 3 mm in thickness is commonly known as 'sheet'. Hot-rolled sheet 3 mm and over in thickness is commonly known as either 'sheet' or 'plate'.

NOTE 2 Steel sheet that is to be subjected to subsequent rerolling is not covered by this International Standard.

Commercial quality sheet (HR1) is intended for general fabricating purposes where sheet is used in the flat or for bending, moderate forming and welding operations. It is commonly produced in the range of thickness 0,8 mm to 12,5 mm inclusive, and in widths of 600 mm and over, in coils and cut lengths.

Drawing quality sheet (HR2, HR3, HR4) is intended for drawing or severe forming, including welding. It is commonly produced in the range of thickness 0,8 mm to 12,5 mm inclusive, and in widths of 600 mm and over, in coils and cut lengths. Drawing quality sheet shall be furnished to all the requirements of this International Standard, or, by agreement when ordered, to fabricate an identified part, in which case the mechanical properties in Table 2 do not apply. Drawing qualities are identified as follows:

- HR2 - drawing quality

- HR3 - deep drawing quality

- HR4 - deep drawing quality aluminum killed

Hot-rolled sheet less than 600 mm wide may be slit from wide sheet and will be considered as sheet.