T70-1 B Elevator Carbin Machined Guide Rail With Trusted Quality

Naming of Guide Rail

Naming of guide rail follows ISO standard, machined guide rail consists of 3 elements e.g. T type guide rail, width of the base and manufacturing process. /A means cold drawn guide rail, /B means machined guide rail, /BE means high precision machined guide rail, if there is necessity using the numbering to show the width of the base and cutting plane of the guide rail e.g. T45/A, T50/A, T70-1/B, T75/B, T78/B,T82/B, T89/B, T90/B, T114/B, T127/B, T127-1/B, T140-1/B, T140-2/B, T140

Chemical Composition

（C）：0.14%—0.22%；
（Si）：0.13%-0.35%；
（Mn）：0.35%~0.65% ；
（P）≤0.045%；
（S）≤0.045%。

Increase carbon content in steel, the breaking point and tensile strength will be increased as well but the elongation and resistance to impact will be reduced.

Silicon acts as a reducing and deoxidizing agent, Manganese acts as deoxidizing and desulfurizing agent, both improve toughness and strength property of steel. Phosphorus and Sulphurn are toxic agents in the steel, both reduce elongation and toughness property of steel, theirs content is less than 0.045%. The hardness of guide rail will ensure the safety grip gains sufficient friction during the break mechanism.