Steel Rail

There are many ways to classify rails, such as weight, applications, and international standards.

1. Classified by weight:
The type of rail is usually divided by weight. For example, the 50kg rail we often say refers to a rail with a weight of 50kg/m, and so on. Rails include 38kg rails, 43kg rails, 50kg rails, 60kg rails, 75kg rails, etc., as well as 24kg rails and 18kg rails. Rails of 43kg and above are generally called heavy rails, otherwise 43kg rails are called light rails. There is a special kind of steel rail called a crane rail. Crane rails are used for crane rails.

2. Classified according to international standards:
In order to meet the various sizes of different countries in the world, steel rails can be processed according to international standards, such as GB, AREMA, BS, UIC, JIS, DIN, AECE, etc.

3. Classified by manufacturing process
According to the manufacturing process, rails are mainly divided into hot-rolled rails and heat-treated rails. In fact, all steel rails are produced through hot rolling processes. The heat-treated steel rail is reheated after the hot rolling process, which is divided into online heat treatment and offline heat treatment. Online heat treatment has become the mainstream, which is more energy-efficient and efficient.

4. Classified by intensity
The rail is a composite alloy, in addition to the main component iron (Fe), there are five main elements, carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), of course, There will be some trace elements vanadium (V), chromium (Cr) and some rare earth elements that play a decisive role. These elements merge with each other, resulting in different physical properties of steel rails due to different manufacturing processes.

5. Classified by railway applictions
1) High-speed rail: The rails of the station (that is, the parking lot) use 60 rails (50 rails are used in some parking lines), and the main line (including the station line and auxiliary lines) is also 60 rails, but the high-speed rail rails have higher requirements for flatness and cross-section. The size requirements are higher.

2) Ordinary railway: It is a passenger and freight railway before the completion of the high-speed railway (still in operation). The depot and parking lot use 50 steel rails, and the main line uses 60 steel rails.

3) Heavy-duty railway: similar to the Daqin, Yuhuang Railway and Shenhua Coal Transportation Line, it is characterized by large axles and large total weight. A train can carry more than 10,000 tons (compared to an average of about 100 tons for subways). This type of railway generally uses special 75 steel rails, which can greatly increase the service life.

4) High-cold railway: Specifically, the Qinghai-Tibet line crosses the permafrost zone, and the steel rails have high requirements for cold resistance and corrosion resistance, and special 60 steel rails are used.

5) Subway: At present, domestic subways are basically 50-track parking lots and 60-track main lines. Of course, the long-term subway main line uses 50 tracks.

6) Tram: Due to the small wheel size, small turning radius, and small number of turnouts, the tram is easy to derail, so the grooved rail with guardrail is used.

Raw Matrials –Heating – High pressure water dephosphorization - Blooming – High pressure air Phosphorus removal-Planish-Sawing-Pre Bending-Air Cooling-Physical and Chemical Property testing-Straightening- UT flaw detection - Drilling and milling-Heat Treatment-Test Rating-Identification-Package-Fished Steel Rails.

Kingrail Parts is a professional manufacturer and supplier of steel rails in China. We can also produce rail rails according to customers' drawings and requirements.