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RAILS

Since 1901, NIPPON STEEL has been manufacturing rails of every description for more than 110 years, using cutting edge equipment and accumulated technology.
NIPPON STEEL rails are highly rated at home and abroad.
Not only that they meet most of the domestic demand, but also exported in large quantities to many countries around the globe.
NIPPON STEEL rails are available in various sizes and materials, so that they can be used for diverse applications, such as ordinary passenger railways, high speed railways, and heavy haul railways.
In addition to standard rails, NIPPON STEEL manufactures various rails such as Head hardened rail, rail for Heavy haul, Tongue rail, and crane rails.
As one of the world's leading rail maker with superior quality, NIPPON STEEL are greatly contributing to Economical and Green railway transportations all over the world.

Features

1. Production by the Universal Rolling Process, with newest technology

  • Rail head with superior forging effect.
  • Highly symmetrical cross sections.
  • Smooth surface without defect

2. World top class technology and facility for producing uniform rails; Steel making, Rolling, Straitening

  • Highly uniform steel by continuous casting method.
  • Superior quality with high purity.
  • Uniform dimensions and shape for all length of the rail

3. Inspection by in-line automatic testing machines

  • Non-destructive testing by Ultra-Sonic Testers
  • Surface defect testing by Eddy Current testers
  • Automatic dimension measurement by Laser

4. Research and Development organized advancing toward easy to use, superior quality rails.

  • Integrated Research and Development organization, with basic theory to product characteristics, welding technology and evaluation of rail performance

5. Setting Up the system to manufacture and ship the world longest as rolled rails for railroads — 150-meter(480ft) long rails —

  • Worlds longest Ex-mill, not welded, long rails for railways
  • Reducing rail maintenance of railway companies by reducing the number of weld
  • Serve to help stabilize the rail

Standard Rails

NIPPON STEEL has varieties of standard rails.

NIPPON STEEL rails are produced to the specifications listed in the table below.

Chemical Composition and Mechanical Properties
Specifications Chemical Composition Mechanical Properties
Number Classification C Si Mn P S Yield Strength Tensile Strength Elongation
range range range max. max. min. range or min. min.
％ ％ ％ ％ ％ N/mm2 N/mm2 (kgf/mm2) ％
AREMA2011
Chapter 4"Rail"		 Standard
Strength		 0.74−0.86 0.10−0.60 0.75−1.25 0.02 0.02 510 983min. 10
Intermediate
strength		 0.72−0.82 0.10−1.00 0.70−1.25 0.02 0.02 552 1014min 8
High strength 0.74−0.86 0.10−0.60 0.75−1.25 0.02 0.02 827 1179min 10
EN13674−2011 R260 0.62−0.80 0.15−0.58 0.70−1.20 0.025 0.025 − 880min 10
R350HT 0.72−0.80 0.15−0.58 0.70−1.20 0.02 0.025 − 1175min 9
IRS T12−2009 GR1080 0.60−0.80 0.10−0.50 0.80−1.30 0.03 0.03 460 1080min. 10
UIC860−R GR900A 0.60−0.80 0.10−0.50 0.80−1.30 0.04 0.04 − 880-1030 10
JIS
E1101−2001		 Standard
Rail		 37A 0.55−0.70 0.15−0.35 0.60−0.90 0.045 0.05 − 690min.(70) 9
40N 0.63−0.75 0.15−0.30 0.70−1.10 0.03 0.025 800min.(82) 10
50N
60
JIS
E1120−2007		 HH340
HH370		 0.72−0.82 0.10−0.55 0.70−1.10 0.03 0.02 − 1080(110) 8
0.10−0.65 0.80−1.20 1130(115)

Head Hardened Rail(DHH Rails)

DHH rail

Recently, railroad companies desires to improve their rail life.
Therefore, rails of various hardness and much deeper hardened layer are required depending on the conditions under which the tracks will be used.
NIPPON STEEL has developed DHH (Deep Head Hardened) rails in order to satisfy these demands.

Features of DHH rails
1. Good wear resistance
DHH rails enjoy long rail life coming from higher hardness produced by In-Line heat treatment process. This leads to high economical performance by reducing maintenance cost and purchasing cost.
2. Deep and Uniformly hardened layer in rail head
DHH rails show a fine pearlitic structure over the whole rail head.
Consequently, DHH rails retain high hardness and strength deep into the rail head.
3. High weldability
DHH rails permit flash-butt welding under the same condition as plain carbon rails.
Also, the softened area of HAZ(Heat affected zone) is very narrow.
Kinds of DHH rails

We produce following grades of DHH rails

  • JIS E 1120 : HH340 HH370
  • EN 13674 : R350HT
  • IRST12 : GR1080

Rail for Heavy Haul (HE Rail™)

Recently, operating environment of track material, especially rail, are getting harsher and harsher, due to the increasing axle load.
Under this circumstance, production for the higher wear resistance and higher economical performance rail are demanded.
Therefore, in order to respond to such demand, We NIPPON STEEL have developed HE rail™ which has higher wear resistance and higher antisurface defect performance than conventional HH rails.

Comparison of DHH rail and HE rail™

Relation between hardness, wear and carbon content (Reference)

Catalogs

RAILS (5.06MB)PDFファイル

  • Features
  • Manufacturing Process
  • Standard Rails
  • Head Hardened Rail (DHH rail)
  • Rail for Heavy Haul (HE railTM)
  • Special Rails
    • Tongue Rails
    • Crane Rails
  • Marking
  • Research on Rails

Contact Information

For further product information

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Contact Information