Exportable international standard flat bottom rail:
Rail for Railway 43, 50, 60, 75kg/m U71Mn, U75V, U76CrRE, U20Mn TB/T2344-2012, TB/T3276-2011
P50, P60, P65 K76, M76T GOST-R51685-200
S49, UIC54, UIC60 900A UIC860
JIS50N, JIS60, JIS75 R260, R350HT JIS E1101
AS50, AS60, AS68 R260, R350HT AS1085, BHP RT STD
90RA, 100RE, 115RE, 132RE, 136RE SS, HH AREMA, ASTM
TR-45, TR-50, TR-57, TR-68 R260, R350HT ASTM
BS75A, BS90A, BS100A 900A BRITISH STANDARD
49E1, 50E2, 54E1, 60E1, 60E2 R260, R260Mn, R350HT EN 13674-1:2011
Switch Rail 50AT1, 60AT1, 60AT2, 60TY1,BT76, 75AT U71Mn, U75V, U76CrRE TB/T3109-2013
Crane Rail QU80, QU100, QU120, CR175 U71Mn YB/T5055-2014
Grooved Rail 59R2, 60R2 U75V EN 14811:2006
Standard EN 13674 - 1:2003 consists of two main parts:
−qualification test and
Qualification tests are some other tests that were previously carried out, as for example, fracture toughness. Acceptance tests characterize the properties of the prescribed tests, which ensure production of high quality rails, and testing requirements of railway administration.
Quality of rails is based on measured values of hardness, by which they introduced new labels for steel rails.
Qualification testing must be conducted at least one in five years and the major
changes in technology, production rails. Additional testing residual stresses are carried
out on all types of steel rails every two years maximum, provided that the longitudinal
strain rate in the rails can amount to up to 250 MPa.
The prescribed qualifying examination is the following:
−fatigue crack growth rate
−residual stress in rail foot
−variation of centre line
−tensile strength and elongation
−other qualification requirements
Within acceptance testing is carried out a series of laboratory tests such as:
−chemical composition (the maximum content of the following elements: H, O, Al, V, N and oligo elements)
−microstructure (increasing x 500)
−degree of decarburizing charred layer (allowed up to 0.25 mm)
−purity of steel (especially the presence of oxide)
−macrostructure (Baumann test)
Other acceptance testing rails are:
−criteria (control template)
−inspection requirements / tolerances for to internal quality and surface quality
Internal state is examined ultrasound in a continuous process control, and includes at least 70% of the head and at least 60% web.
- Standard of UIC 860 V: 1996 - prescribed four types pearlite steel rails in the range of tensile strength from 700 to 1300 MPa.
- Standard EN 13674 - 2003, provides seven types pearlite steel hardness in the range 200 to 390 HBV, types steel in accordance with EN 13674, based on the values of hardness (R 200, R 220, R 260, R 260 Mn, 320 Cr, 350 HT, 350 LHT).