BS 11:1985 pdf download.Railway rails.
4 Dimensions and properties of rail sections Where a rail section is ordered by BS rail section number [see 2.1 c)], its dimensional properties and mass per unit length shall comply with the appropriate values given in Table 9 to Table 12 and Figure 5 to Figure 23. NOTE 1 The provisions of this standard are not restricted to rails of British Standard section and may be applied to any section of 24.8 kg/m (50 lb/yd) or greater linear mass. NOTE 2 The mass per unit length of rails quoted in this standard has been determined by multiplying the sectional area in mm 2 by 0.00785 to give the mass in kg/m or by multiplying the sectional area in in 2 by 10.209 to give the mass in lb/yd. NOTE 3 The rail sections in this standard were designed before the change to SI units was planned. The original imperial dimensions used have been converted to SI dimensions with an accuracy necessary for the retention of the previous imperial profiles and properties of the rails.
5 Manufacture of steel The source of the steel and the steelmaking processes employed shall be the responsibility of the manufacturer. The purchaser can request the supply of a broad outline description of the steelmaking and casting processes [see 2.2 a)] and the manufacturer shall not alter these without informing the purchaser.
6 Chemical composition When tested in accordance with clause 16 the chemical composition of the appropriate grade of steel shall comply with the limits given in Table 1.
7 Mechanical properties
7.1 Falling weight test When tested in accordance with clause 17, the test pieces shall not fracture or crack between the supports.
7.2 Tensile properties When tested in accordance with the tensile test given in clause 18, the tensile properties of the steel shall comply with the values given in Table 2.
8.2.2 Manual hot stamping. When manual hot stamping is used the specified rail identification shall be stamped on the side of the rail web in a position approximately 500 mm from the rail end.
8.2.3 Machine hot stamping. When repetitive machine hot stamping is used, the specified rail identification shall appear at least once every 5 m along the length of the rail.
8.2.4 Casting process identification. The manufacturer shall ensure that rails rolled from continuously cast blooms can be separately identified from rail produced from ingots.
8.2.5 Sequence casting identification. In the case of sequence continuous casting, a cast shall be considered as including all blooms up to, but excluding, the first bloom that is known to be entirely of the next cast. The change-over blooms at the end of the cast, plus the rails produced therefrom, shall be clearly identified.
BS 11 pdf download.