Rails for trams type 55 Kg/m

Material
Electric steel, with the chemical composition and the mechanichal charactheristics according to STR 3-1990

Chemical composition [%]
C Mn Si P S
0,40 - 0,55 0,8 - 1,20 max. 0,35 max. 0,05 max. 0,05
Mechanical characteristics
Tensile strength [N/mm2]
min. 680

Dimensions and limit tolerances
According to STR 3-1990

Dimensions and tolerances [mm]

 According to fig
*) Limit tolerance for other dimensions: +/- 1,0 mm

Shape deviations
Burrs due to cutting max. 8 mm
Burrs on the profile bottom max. 2 mm
Protuberance on sides max. 2 mm
Maximum permissible deviation from straightness in orizontal and vertical plane 2,0 mm/ m

Delivery lengths
Length types Delivery length [m]
Manufacture lengths  max. 12

Delivery state, delivery
Delivery state Delivery
Rough rolled, straightened, without heat treatment, unmilled and undrilled Without packing and unprotected to corrosion, not bundled