An overview of IS-1786 (1985) (HIGH STRENGTH DEFORMED STEEL) Section 2

Section 2

             The following test has to be conducted in test specimens as per IS code requirement.

1. Tensile Test
2. Bend Test
3. Rebend Test

 Tensile Test

                            

            As per code recommended for production of Plates, Sections ( Angles, Tees, Beams, Channels, etc) and Flats— One tensile test shall be made from finished steel for every 40 tonnes or part thereof rolled continuously from each cast, a separate test being made for each class of steel product ( namely, plates, sections, and flats ) rolled from a cast.

                 Where plates, sections or flats of more than one thickness are rolled from the same cast, one additional tensile test shall be made from the material in each class of product for each variation in thickness of 6 mm.

                   Bar’s ( Round, Square, and Hexagonal) — One tensile test shall be made from finished steel for every 40 tons or part thereof rolled continuously from each cast and for every class of product. When more than one diameter or thickness of the bar is specified, in additional the tensile test shall be made for each diameter ‘or thickness of the bar ordered, if so desired by the purchaser.

                the tensile test should follow as per IS -226 from the following table.The tensile strength, yield stress and percentage elongation of steel shall be determined from standard test pieces cut lengthwise or crosswise front plates and lengthwise from sections, flats and bars. The tests shall be carried out on Indian Standard test pieces prepared in accordance with IS: I608.

Table 1 -IS 226

An overview of IS-1786 [ HIGH STRENGTH DEFORMED STEEL] --Section -1

An overview of IS-1786    [ HIGH STRENGTH DEFORMED STEEL] - Section -1

                          The steel shall be manufactured by the method of open-hearth, electric, duplex,

basic-oxygen, or a combination of these processes. For manufacturing of steel following proportion of constituents should follow in order to reach their absolute strength.

                the nominal size of bar as follows - 4, 5, 6, 7, 8, 10, 12, 16, 18, 20, 22, 25, 28, 32, 36, 40,

45 and 50 mm, apart from this cross sectional dimension depends on manufacture and customers requirement and quality of material test conducted as per Indian Standard code provisions.

the following table shows cross sectional area and mass of the bars prescribed in IS-1786.

Proof stress, percentage elongation and tensile strength for all sizes of deformed bars/wires determined on the effective cross-sectional area are tabulated following categories.