Chinese carbon structural steels are steels used to manufacture building materials of various shapes. Many forms of structural steel take the form of elongated beams with a specific cross-sectional profile.
According to different purposes, it is divided into the following types:
Carbon Structural Steels
Carbon structural steel refers to an iron-carbon alloy with a carbon mass fraction of 0.04% to 2.0%.
It is mainly used in railways, bridges and various construction projects to manufacture various metal components subject to static loads, as well as mechanical parts and general welded parts that do not require heat treatment.
According to its carbon content, it can also be divided into the following three types.
- Low carbon steel – steel with a carbon mass content of less than 0.25%.
- Medium carbon steel – steel with a carbon mass content between 0.25% and 0.60%.
- High carbon steel – steel with a carbon content of 0.60% to 2.0%.
General Carbon Structural Steels
Including Q195, Q215, Q235 and Q275
Quality carbon structural steels
Compared to carbon steel in general, they have lower levels of sulfur, phosphorus and other non-metallic inclusions. These steels include: 08F, 10F, 15F, 08#, 10#, 15#, 20#, 25#, 30#, 35#, 40#, 45#, 50#, 55#, 60#, 65#, 70 #, 75#, 80#, 85#, 15Mn, 20Mn, 25Mn, 30Mn, 35Mn, 40Mn, 45Mn, 50Mn, 60Mn, 65Mn, 70Mn.
Low-alloy, high-strength structural steels
High-strength low-alloy structural steel is a steel that adds a small amount of one or more alloying elements to improve the strength, corrosion resistance, wear resistance, or low-temperature impact toughness of general carbon steels.
These steels include Q345, Q390, Q420, Q460, Q500, Q550, Q620 and Q690.
Weather-resistant structural steels
Weather resistant structural steel is a steel that increases resistance to atmospheric corrosion by adding a small amount of alloying elements such as Cu, P, Cr, Ni, etc.
These steels include Q235NH, Q265GNH, Q295NH, Q295GNH, Q310GNH, Q355NH, Q355GNH, Q415NH, Q460NH, Q500NH, Q550NH.
Structural Steels for Bridges
Bridge construction steels including Q345q, Q370q, Q420q, Q460q, Q500q, Q550q, Q620, Q690q.
