GB Standard Railway Metal 55Q

55Q is a medium carbon steel mainly used for manufacturing mining steel rails. The following is a detailed explanation about the 55Q material:

Chemical composition

The carbon (C) mass fraction of 55Q ranges from 0.50% to 0.60%, belonging to the category of medium carbon steel. Its chemical composition also includes elements such as manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), etc., and the specific content is controlled according to standard requirements.

Performance characteristics

High hardness and strong wear resistance: 55Q steel rails have excellent hardness and wear resistance due to their high carbon content, making them suitable for mining environments.
Low plasticity and toughness: Due to its high carbon content, 55Q has relatively low plasticity and toughness, especially prone to fracture under low temperature conditions.

GB Standard Railway 

Comparison with other steels

Compared with Q235B steel rails, 55Q has a higher carbon content, better hardness and wear resistance, but poorer plasticity and toughness, and a relatively higher price.

Metal 55Q

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