Construction Products
RAILS
http://www.nssmc.com/
2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 Japan
Tel: +81-3-6867-4111
RAILS
K003en_02_201510f
© 2014 NIPPON STEEL & SUMITOMO METAL CORPORATION
Notice: While every effort has been made to
ensure the accuracy of the information contained within this publication, the use of the
information is at the reader´s risk and no warranty is implied or expressed by Nippon Steel
& Sumitomo Metal Corporation with respect
to the use of the information contained herein.
The information in this publication is subject to
change or modification without notice. Please
contact the Nippon Steel & Sumitomo Metal
Corporation office for the latest information.
Please refrain from unauthorized reproduction
or copying of the contents of this publication.
The names of our products and services shown
in this publication are trademarks or registered
trademarks of Nippon Steel & Sumitomo Metal
Corporation, affiliated companies, or third parties granting rights to Nippon Steel & Sumitomo
Metal Corporation or af filiated companies.
Other product or service names shown may be
trademarks or registered trademarks of their
respective owners.
Rails Manufactured by
Nippon Steel & Sumitomo
Metal Corporation
CONTENTS
Features
02
Manufacturing Process
04
Standard Rails
06
Head Hardened Rail (DHH rail)
12
Rail for Heavy Haul (HE rail™)
19
Special Rails
22
Tongue Rails
23
Crane Rails
25
Marking
26
Research on Rails
28
Since 1901, Nippon Steel & Sumitomo Metal Corporation
(NSSMC) has been manufacturing rails of every description
for more than 110 years, using cutting edge equipment and
accumulated technology.
NSSMC 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.
NSSMC 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, NSSMC 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, NSSMC are greatly contributing to Economical and
Green railway transportations all over the world.
01
Features
by the Universal Rolling Process,
1 Production
with newest technology
● Rail
head with superior forging effect.
● Highly symmetrical cross sections.
● Smooth surface without defect
top class technology and facility for producing uniform rails;
2 World
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
and Development organized advancing
4 Research
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
Up the system to manufacture and
5 Setting
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
02
Features
to help stabilize the rail
Features
03
Manufacturing Process
V1 Mill
B.D Mill
Oxygen-blowing
Blast furnace
Charging
molten iron
Pig iron
Bloom
V2 Mill
Basic-oxygen
furnace
Secondary refining
Continuous casting
Reheating
Furnace
E1 Mill
V3 Mill
E2 Mill
F Mill
V4 Mill
Hot saw
Hot Stamper
Cooling
Slack Quench
Equipment
Roller Straightener
First Inspection
(U.S.T , E.C.T , Laser Dimension Measurement)
Sawing & Drilling line
50M 150M
rail shipment
Chamfering
Final Inspection
Assortment
Rolling Mill
04
Manufacturing Process
Manufacturing Process
05
Standard Rails
NSSMC has varieties of standard rails.
06
Standard Rails
Standard Rails
07
Specifications
NSSMC rails are produced to the specifications listed in the table below.
Chemical Composition and Mechanical Properties
AREMA2011
Chapter 4"Rail"
EN13674−2011
Mn
P
S
range
range
range
max.
max.
min.
%
%
%
%
%
N/mm2
0.74−0.86
0.10−0.60
0.75−1.25
0.020
0.020
510
N/mm2(kgf/mm2)
983min.
%
mm
10
0.72−0.82
0.10−1.00
0.70−1.25
0.020
0.020
552
1014min
8
0.74−0.86
0.62−0.80
0.72−0.80
0.10−0.60
0.15−0.58
0.15−0.58
0.75−1.25
0.70−1.20
0.70−1.20
0.020
0.025
0.020
0.020
0.025
0.025
827
−
−
1179min
880min
1175min
10
10
9
Weight
of falling
range or min. weight
HBW
kg
diam.=10mm
GL=50mm
325
370
260−300
350−390
−
−
−
7.4
0.850
0.80−1.30
0.030
0.030
460
1080min.
10
diam.=10mm
GL=50mm
340−390
1270
UIC860−R
GR900A
0.60−0.80
0.10−0.50
0.80−1.30
0.040
0.040
−
880-1030
10
diam.=10mm
GL=50mm
−
1,000
0.55−0.70
0.15−0.35
0.60−0.90
0.045
0.050
690min.(70)
9
0.63−0.75
0.15−0.30
0.70−1.10
0.030
0.025
800min.(82)
10
1080(110)
1130(115)
8
JIS
E1120−2007
HH340
HH370
0.72−0.82
0.10−0.55
0.70−1.10
−
0.030
0.020
0.80−1.20
0.10−0.65
*1 Height of falling for falling weight testing are as per JIS E1101-2001
C
R
−
JIS No.4
diam.=10mm
GL=50mm
235
D
R
−
0.10−0.50
−
m
−
0.60−0.80
37A
40N
50N
60
m
−
GR1080
Standard
Rail
Distance
between
bearer
310
diam.=12.7mm
GL=50.8mm
IRS T12−2009
JIS
E1101−2001
Height of
drop
G
Standard
Strength
Intermediate
strength
High strength
R260
R350HT
Si
Falling Weight Testing
Brinell
hardness
907
321−375
331−388
Mass
of rail
(kg/m)
150×
1000
HU5.0
HD5.1
HD7.0
HD10.6
*1
*1
B
Y
1.000
Neutral Axis
X
X
0.914
Yb
Classification
C
Mechanical Properties
Tensile
Elongation
Strength
Test Piece
range or min.
min.
E
Number
Yield
Strength
A
Chemical Composition
F
Specifications
Y
Dimensions and Weights
The dimensions and weights of rails being manufactured at NSSMC are tabulated below. Manufacture of
sections other than those tabulated below will be considered depending on your quantities ordered.
The standard length for tails is 25m under JIS, but longer or shorter length can be delivered if required.
150m rail is also available.
Item
Note
s
Sym Unit
b
ol
Specifications
54kg
EN54E1
EN
EN60E1
60kg
EN60E2
54kg
UIC54
UIC
60kg
UIC60
115RE
115lbs
115L-10
132lbs
132RE
AREMA
136RE
136lbs
136L-10
141lbs
141RE
GOST
65kg
P65
60kg
AS60
AS
68kg
AS68
TR
45kg
TR45
37kg
37A
40kgN
40N
JIS
50kgN
50N
60kg
60
Sectional
Area
Dimensions
A
B
mm
in.
mm
in.
159.00 (6-13/50) 140.00 (5-22/43)
172.00 (6-71/92) 150.00 (5-48/53)
172.00 (6-71/92) 150.00 (5-48/53)
159.00 (6-13/50) 140.00 (5-22/43)
172.00 (6-71/92) 150.00 (5-48/53)
(168.27) 6-5/8 (139.70) 5-1/2
(168.27) 6-5/8 (139.70) 5-1/2
(180.97) 7-1/8 (152.40) 6
(185.73) 7-5/16 (152.40) 6
(185.73) 7-5/16 (152.40) 6
(188.91) 7-7/16 (152.40) 6
180.00 (7-2/23) 150.00 (5-48/53)
170.00 (6-9/13) 146.00 (5-3/4)
185.00 (7-19/67) 152.40 (6)
(142.87) 5-5/8 (130.17) 5-1/8
122.24 (4-13/16) 122.24 (4-13/16)
140.00 (5-22/43) 122.00 (4-49/61)
153.00 (6-2/85) 127.00 (5)
174.00 (6-17/20) 145.00 (5-17/24)
C
D
E
F
G
R
S
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
cm2
70.00 (2-65/86) 16.00 (17/27) 49.40 (1-17/18) 30.20 (1-7/37) 76.20 (3) 508.00 (20) 69.77
72.00 (2-5/6) 16.50 (13/20) 51.00 (2) 31.50 (1-6/25) 60.25/92.25 (2-16/43 / 3-12/19) 120.00 (4-71/98) 76.70
72.00 (2-5/6) 16.50 (13/20) 51.00 (2) 31.50 (1-6/25) 60.25/92.25 (2-16/43 / 3-12/19) 120.00 (4-71/98) 76.48
70.00 (2-65/86) 16.00 (17/27) 49.40 (1-17/18) 30.20 (1-7/37) 76.20 (3) 508.00 (20) 69.34
72.00 (2-5/6) 16.50 (13/20) 51.00 (2) 31.50 (1-6/25) 60.25/92.25 (2-16/43 / 3-12/19) 120.00 (4-71/98) 76.86
(69.05) 2-23/32 (15.87) 5/8 (42.86) 1-11/16 (28.57) 1-1/8 (82.55) 3-1/4 (355.60) 14 (72.59)
(69.05) 2-23/32 (15.87) 5/8 (42.86) 1-11/16 (28.57) 1-1/8 (82.55) 3-1/4 (355.60) 14 (72.80)
(76.20) 3 (16.66) 21/32 (44.45) 1-3/4 (30.16) 1-3/16 (98.43) 3-7/8 (406.40) 16 (83.30)
(74.61) 2-15/16 (17.46) 11/16 (49.21) 1-15/16 (30.16) 1-3/16 (98.43) 3-7/8 (508.00) 20 (85.98)
(74.61) 2-15/16 (17.46) 11/16 (49.21) 1-15/16 (30.16) 1-3/16 (98.43) 3-7/8 (508.00) 20 (85.98)
(77.79) 3-1/16 (17.46) 11/16 (54.77) 2-5/32 (30.16) 1-3/16 (98.43) 3-7/8 (508.00) 20 (89.01)
75.00 (2-20/21) 18.00 (17/24) 45.00 (1-71/92) 30.00 (1-2/11) 82.50 (3-1/4) 400.00 (15-3/4) 82.65
70.00 (2-65/86) 16.50 (13/20) 49.00 (1-13/14) 28.00 (1-4/39) 80.00 (3-3/20) 300.00 (11-73/90) 77.28
74.60 (2-15/16) 17.50 (31/45) 49.20 (1-15/16) 30.20 (1-7/37) 98.40 (3-7/8) 508.00 (20) 86.02
(65.08) 2-9/16 (14.28) 9/16 (37.30) 1-15/32 (25.40) 1 (73.18) 2-37/42 (355.60) 14 (56.90)
62.71 (2-15/32) 13.49 (17/32) (36.12) (1-19/45) 21.43 (27/32) 53.78 (2-1/8) 304.80 (12) 47.33
64.00 (2-13/25) 14.00 (43/78) (41.00) (1-35/57) 25.50 (1) 70.00 (2-3/4) 500.00 (19-11/16) 52.01
65.00 (2-52/93) 15.00 (13/22) (49.00) (1-13/14) 30.00 (1-3/16) 76.00 (2-63/64) 500.00 (19-11/16) 64.02
65.00 (2-52/93) 16.50 (13/20) (49.00) (1-13/14) 30.10 (1-3/16) 77.50 (3-3/64) 500.00 (19-11/16) 77.50
Weight
W
in.2 kg/m lb/yd
−
(10.73) 54.77
(11.80) 60.21
−
(11.85) 60.03
−
−
(10.67) 54.43
(11.82) 60.34
−
11.22 56.74 141.38
11.25 56.90 141.68
12.91 65.53 130.80
13.33 67.41 135.88
13.33 67.48 136.02
13.80 69.79 140.70
−
(12.72) 64.72
(11.89) 60.70
−
(13.23) 67.50
−
8.82 (44.64) 90.00
(7.34) 37.20
−
−
(8.06) 40.90
(9.95) 50.40
−
(12.00) 60.80
−
Distance
from Base
of Rail to
Neutral Axis
Yb
mm
(75.1)
(80.9)
(80.7)
(75.0)
(81.0)
−
−
−
−
−
−
81.3
79.1
85.0
−
(57.7)
(66.9)
(71.6)
(77.8)
Moment of Inertia
lx
in.
−
−
−
−
−
2.99
2.98
3.20
3.34
3.34
3.25
−
−
−
2.54
−
−
−
−
ly
cm4
in.4
cm4
in.4
(2,338) (56.17) (419.2) (10.05)
(3,038) (72.99) (512.3) (12.29)
(3,022) (72.60) (510.5) (12.26)
(2,346) (56.37) (417.5) (10.01)
(3,055) (73.40) (512.9) (12.30)
(2,726) (65.5) (447.0) (10.70)
(2,742) (65.9) (447.0) (10.70)
(3,658) (87.9) (601.6) (14.40)
(3,920) (94.2) (603.2) (14.44)
(3,920) (94.2) (603.2) (14.44)
(4,180) (100.4) (622.9) (14.91)
(3,540) (85.1) (564.0) (13.53)
(2,940) (70.6) (491.0) (11.77)
(3,940) (94.7) (602.0) (14.44)
(1,611) (38.7) (308.0) (7.40)
(954) (22.92) (226.0) (5.42)
(1,369) (32.89) (231.0) (5.54)
(1,968) (47.28) (334.0) (8.01)
(3,083) (74.07) (512.0) (12.31)
Section Modulus
Secondaly radius
of cross section
ix
mm
(57.9)
(62.9)
(62.9)
(58.2)
(63.0)
(61.3)
(61.4)
(66.3)
(67.5)
(67.5)
(68.5)
(65.4)
(61.7)
(67.7)
(53.2)
(44.9)
(51.3)
(55.4)
(63.1)
iy
in.
(2.28)
(2.48)
(2.47)
(2.29)
(2.48)
(2.41)
(2.41)
(2.61)
(2.66)
(2.66)
(2.70)
(2.58)
(2.43)
(2.66)
(2.09)
(1.17)
(2.02)
(2.18)
(2.48)
mm
(24.51)
(25.84)
(25.84)
(24.54)
(25.83)
(24.8)
(24.8)
(26.9)
(26.5)
(26.5)
(26.5)
(26.1)
(25.2)
(26.5)
(23.3)
(21.85)
(21.07)
(22.84)
(25.70)
Zx
Head
in.
(0.97)
(1.02)
(1.02)
(0.97)
(1.02)
(0.98)
(0.98)
(1.06)
(1.04)
(1.04)
(1.04)
(1.03)
(0.99)
(1.04)
(0.92)
(0.86)
(0.83)
(0.90)
(1.01)
Zy
Base
Head
cm3
in.3
cm3
in.3
cm3
(278.7) (10.97) (311.2) (18.98) (116.09)
(333.6) (13.13) (375.5) (22.90) (137.62)
(330.8) (20.19) (374.5) (22.85) (137.78)
(279.2) (10.99) (312.9) (19.08) (116.30)
(335.5) (13.21) (377.4) (23.01) (138.40)
(297) (18.00) (361) (21.90) (129.5)
(298.7) (18.10) (362.6) (22.00) (129.8)
(367) (22.40) (449) (27.40) (156.8)
(388) (23.70) (462) (28.20) (161.1)
(388) (23.70) (462) (28.20) (161.1)
(414) (25.24) (475) (28.97) (161.8)
(245.00) (14.94) (285.00) (17.38) (150.4)
(323.20) (19.71) (371.40) (22.65) (140.3)
(391.70) (23.88) (463.80) (28.28) (161.4)
(206.00) (12.60) (249.00) (15.20) (94.70)
(149.0) (9.09) (163.0) (9.94) (71.90)
(187.0) (11.40) (205.0) (12.50) (72.10)
(242.0) (14.80) (275.0) (16.80) (102.60)
(321.0) (19.60) (396.0) (24.20) (157.70)
in.3
(7.08)
(8.39)
(8.41)
(7.09)
(8.44)
(7.88)
(7.90)
(9.57)
(9.83)
(9.83)
(9.87)
(9.17)
(8.55)
(9.84)
(5.78)
(4.39)
(4.40)
(6.26)
(9.62)
Base
cm3
(59.67)
(68.16)
(68.07)
(60.00)
(68.50)
(63.9)
(64.1)
(78.5)
(79.0)
(79.0)
(81.4)
(75.2)
(67.3)
(79.0)
(47.30)
(36.90)
(37.80)
(52.50)
(70.70)
in.3
(3.64)
(4.16)
(4.15)
(3.66)
(4.18)
(3.89)
(3.90)
(4.79)
(4.82)
(4.82)
(4.97)
(4.59)
(4.10)
(4.82)
(2.89)
(2.25)
(2.31)
(3.21)
(4.31)
( ) denotes values not stipulated in specifications but calculated by NSSMC
08
Standard Rails
Standard Rails
09
Section
AREMA (American Railway Engineering and Maintenance-of-way Association)
JIS（Japanese Industrial standards）
115 RE Rail
37kg Rail (37A)
(41)
6
73.5
140
70
25.5
R1
5
5
1:2.7
1:9
15.5
R2
122
Approx. C1.5
Approx. 50
Approx. C1.5
φ24
57
φ25.40
127.00
152.40
R300
R80
1:40
(36.12)
.80
R304
64.69
Approx. C1.5
R500
R15
53.78
152.40
14
122.24
3.18
1.59
R13
Approx. C1.5
21.43
19.0
5R
2
19
.0
5R
2
25.00%
3.18
1.59
R500
53.78
122.24
R1.59
Approx. 45
3.18R
Approx.
C1.5
13°
1
.00R
508
98.43
128.58
54.77
188.91
103.98
30.16
30.16
203.20R1
19
.05
R2
25.00
%
1.59R
139.70
203.20R1
9.53
R3
16.66
44.45R
2
203.2R1
2.50%
7.14
185.73
106.36
84.89
107.96
82.55
98.43
76.20R2
19
.05
R3
49.21
203.20R1
42.86
96.84
355.60R1
19
.0
5R
2
2
5R
.0
19
Approx. C1.5
13.49
17.46
508.00R1
R3
1:2.7
5
R6
R20
R
5
.3
1.59
1.59
0R1
203.2
7.94R3
13°
5
6.3
R304.80
33.33%
203.2R
1
R1
8.0
50
R1
7.94R1
7.94R3
17.46
.59
44.45
R2
R6
R2
.05
19
25.00
%
7.94R1
R
14.29R3
2
19.05R
1
.60R
355
14.29R3
3
4R
7.9
19
.05
R2
15.88
28.58
%
25.00
355.60
R1
1.59
1.59
44.45R2
1
14.29R
7.94R
R3
.05
19
17.46
25.00%
11
4
7.9
77.79
28.00
8.75%
2.50%
9.53R3
1.59R1
1.59R1
355.60R1
76.20R2
168.28
54.00R
2
64
62.71
28.04
28.66
54.00R2
40kg N Rail (40N)
74.61
69.06
9.53R3
141 RE Rail
57
136 RE Rail
60.50
77
130
EN (European Norm)
(7.14%)
70
φ24
77
150.00
75.00
130
94.9
73.8
12
145
Approx. C1.5
Approx.
73.8
(36.3
5%)
30.1
R19
77.8
77.5
63
76
1:4
R3
R2
Approx. C1.5
63
7.0R3
4.0R
2.0R
φ25
174
74
16.5
Approx. C1.5
500R
127
120.0R1
(49)
1:40
R50
R600
(49)
11
18.5
R2
1:10
30
153
14.30
19.50
28.75
(7.14%)
75.00
140.00
31.50
(36.3
5%)
R20
16.50
N.A.
Approx. C1.5
R500
Approx.
C1.5
R500
76.25
●
4.0
2.0
15
5
1:2.7
35.0R2
11.50
80.92
35.00
R1
Approx. C1.5
16.50
32.00
172.00
32.00
28.75
120.00
3
7.0R
R5
1:4
9
R30
R500
%)
(36.36
R1
120.0
19.50
28.75
19.50
16.50
16.50
11.50
31.50
35.0R2
120.00
19.50
89.50
172.00
51.00
51.00
49.40
159.00
30.20
11.00
3.0R
3.0
40.0R
10.00%
%)
(36.36
7.00
40.00
(36.3
6%)
20.0R
2
.0R
16
14.30
14.10
300.0R1
25.40
46.00
76.20
16.00
2.0R
35.00
70.0R3
16.0
R2
8.0R1
5.00%
8.0R3
22.0
R2
508.0R1
5.00%
3.0
)
6%
(36.3
2
80.0R
1
.0R
13
3.0R
300.0R1
5.00%
13.0R1
R2
1:2.7
5
R6
R1
200.0
80.0R2
(23.778)
R300
R80
(20.456)
(20.0246)
R13
R13
1:40
(52.053)
A pprox. 60
(49.7268)
65
15
11
72.00
70.774
(48.913)
72.00
60kg Rail (60)
65
(74.105)
(74.105)
70.00
50kg N Rail (50N)
EN60 E2 Rail
R15
EN60 E1 Rail
80.67
EN54 E1 Rail
φ25
77
130
130
150.00
UIC (International Union of Railways)
IRS (Indian Railway Standard)
GOST
P65 Rail
AS68 Rail
7.0
R1
75.00
1 in 40
1 in 40
49.2
Bolt holes
4.0R
2.0R
30.2
25.00
%
(29.64)
150.00
R19.1
44.50
%
25.00
(22.59)
30.00
4.0R
2.0R
(10.81)
11.25
80.95
1:14
16.90
19.50
11.54
R
Standard Rails
NEUTRAL AXIS
1 in
R3.2
152.4
98.4
0R
150.00
203 and 508 Radii
17.5
85.0
7.0
75.00
40.10
(41.85)
(50.76)
1
.00R
400
78.6
35.00R
4.00R
2.00R
R7.9
R19.1
R203.0
7.1
370.00
R1
R254
1 in 4
4
R508.0
120R
1:2
15.0R2
18.00
16.50
.75
R7.9
1 in
(11.96)
185.7
NEUTRAL AXIS
R1
3.0
106.4*
R2
15.0
180.00
105.00
16.50
89.50
32.00
(36.62)
(16.45)
R31.8
R14.3
25
.0
R2
19.50
120R
0
40.0
31.50
15.0R3
(19.60)
R2
.0
25
28.75
172.00
500.0R1 80.02R
3.0
R1
25.0
0%
97.50
28.75
35.0
5.00%
1:20
7.0
35.6
7.0R1
5
.7
1:2
0R
10
45.00
300R
R
80.00
3.00R
51.00
0R
3
.0R
15
13.0
0R
80.0R2
74.6
20.00
(0.10)
21.00
75.00
(15.70)
74.30
(35.62)
UIC60/IRS60 Rail
AS (Australian Standard)
4
R1.6
Standard Rails
11
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.
NSSMC 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
12
Head Hardened Rail (DHH rail)
Head Hardened Rail (DHH rail)
13
Specifications
3 Brinell Hardness in rail section (for reference)
Compared with conventional heat treated rails. The DHH rail
has more uniform hardness over the entire rail head section.
JIS E 1120 (for reference)
HH370
1 Chemical Composition(%)
Hardness level
Type
C
Si
Mn
P
S
Cr
V
DHH340
0.72—0.82
0.10 —0.55
0.70—1.10
0.030 and under
0.020 and under
0.20 and under
0.03 and under*
Vickers
(Hv)
Brinell
(HB)
DHH370
0.72—0.82
0.10 —0.65
0.80 —1.20
0.030 and under
0.020 and under
0.25 and under
0.03 and under*
415 up
（395 up）
400 up
（380 up）
385 up
（365 up）
370 up
（350 up）
355 up
（335 up）
* : Vanadium are added if needed
2 Mechanical Properties
Type
Tensile Strength
N/mm2(kgf/mm2)
Elongation
(%)
DHH340
1,080 (110) and over
8 and over
340 up
（320 up）
DHH370
1,130 (115) and over
8 and over
325 up
（305 up）
(JIS No4 testpiece)
310 up
（290 up）
295 up
（275 up）
280 up
（260 up）
265 up
（245 up）
250 up
（230 up）
Type
Vickers hardness (HV)
A point; gauge corner
B point; center of the head
Surface hardness at head
Brinell hardness (HBW)
DHH340
321—375
311 and over
311 and over
DHH370
331—388
331 and over
331 and over
11
B
16
3 Hardness
A
HH340
NHH
Quality
Si
Mn
P
S
Cr
electrical resistivity
(μΩ•cm)
DHH340
0.78
0.24
0.87
0.012
0.011
0.13
22.80
DHH370
0.77
0.23
0.88
0.013
0.008
0.20
23.44
NHH
0.78
0.23
0.86
0.023
0.009
0.04
22.73
Standard
rail
0.71
0.23
0.91
0.015
0.006
0.04
22.01
2 Tensile properties (for reference)
15
Type
Tensile Strength
N/mm2 (kgf/mm2)
Elongation
(%)
DHH340
1,164 (118.7)
14
DHH370
1,291 (131.7)
13
(JIS No4 testpiece)
400
400
HH370
350
350
HH340
300
300
Hardness (HB)
C
Hardness (HV)
Type
15
Reference
1 Chemical Composition(%) and Electric Resistance (for reference)
250
250
200
1 3 5
8 10 12 15
20
25
30
35
40
45
Distance from the top of the head (mm)
14
Head Hardened Rail (DHH rail)
Head Hardened Rail (DHH rail)
15
4 Macro and Micro structure of DHH rail (for reference)
6 Macro structure of DHH rail (for reference)
（ⅰ）Flash-butt welding
Macro structure
DHH370 rail
DHH rail
Macro structure of vertical cross section
5
Hardness distribution of top rail head and vertical cross section
50N HH340
Fulsh-butt welding(K-355)
25
A
Top rail head
400
hardness HV10
B
Micro structure
(×5,000)
conventional HH rail
DHH rail
Point B
Point A
300
DHH cooling (as rolled)
conventional HH cooling (as rolled)
200
5mm under top rail head
400
300
200
DHH cooling (as rolled)
conventional HH cooling (as rolled)
60
40
20
0
20
40
60
distance from the center of the weld (mm)
DHH340 rail
conventional HH rail
Point A
Point B
Macro structure of vertical cross section
Hardness distribution of top rail head and vertical cross section
50N HH340
Fulsh-butt welding(K-355)
Top rail head
hardness HV10
400
5 Residual Stress
The HH rail shows stable residual stress distribution over the entire cross-section.
2
6
7
1
8
Residual stress (N/mm2)
5
cooling (as rolled)
20
0
20
40
60
HH
-20
NHH
9
4
3 5
2 6
Head
Head Hardened Rail (DHH rail)
40
0
-60
16
60
distance from the center of the weld (mm)
-40
10
5mm under top rail head
400
200
20
4
cooling (as rolled)
200
300
40
3
300
1 7
8
Web
9
10
Base
Head Hardened Rail (DHH rail)
17
（ ⅱ ）Thermite Welding
Thermite welding is also available for DHH340 & DHH370.
Rail for Heavy Haul
DHH370 rail
Macro structure of welded joint (JIS 50N rail)
(HE Rail™)
Hardness distribution of welded joint (DHH370/TW)
(with post-heat treatment)
450
2.5mm under the surface
400
hardness HV10
350
300
250
5mm under the surface
400
350
300
250
120
80
40
0
40
80
120
distance from the center of the weld (mm)
DHH340 rail
Macro structure of welded joint (JIS 50N rail)
Hardness distribution of welded joint (DHH340/TW)
(with post-heat treatment)
450
2.5mm under the surface
400
hardness HV10
350
300
250
5mm under the surface
400
350
300
250
120
80
40
0
40
80
120
distance from the center of the weld (mm)
18
Head Hardened Rail (DHH rail)
Rail for Heavy Haul (HE rail)
19
rail are demanded.
Therefore, in order to respond to such demand, We
NSSMC have developed HE rail™ which has higher
wear resistance and higher anti-surface defect performance than conventional HH rails.
3 Hardness of rail cross section (Reference)
400
Comparison of DHH rail and HE rail™
₄ Micro structure (Reference)
DHH(0.8%C)
HE370(0.9%C)
HE400(0.9%C)
380
Hardness (HBW)
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
360
340
0.9%C (HE rail) (395HV)
320
Rail for Heavy haul
DHH rail
0.8% carbon
HE rail
0.9% and higher carbon
300
0
10
20
30
40
50
Distance from the top of the head (mm)
0.8%C (HH rail) (385HV)
Relation between hardness, wear and carbon content (Reference)
1.2
5 Welding test result (Reference)
1.1
（ⅰ）Fulsh-butt welding
HE370 rail
DHH (0.8%C)
HE (0.9%C)
HE (1.0%C)
0.8
0.6
250 275 300 325 350 375 400 425
400
contact
pressure: 640MPa
slip factor : 20%
BODY
0.7
450
Hardness (Hv)
0.9
HEAD
Wear (g)
1.0
Quality
300
250
200
-60 -50 -40 -30 -20 -10
FOOT
Hardness (HV)
350
0
-60 -50 -40 -30 -20 -10
Distance from the center of the weld (mm)
HE370 (0.9 C)
Characteristic of DHH rail and HE rail are shown below
Rails
DHH370
DHH370S
Type
eutectoid
HE370
HE400
Hyper
eutectoid
HE-X
2 Tencile test result (Reference)
C
Si
Mn
Cr
0.8
0.3
1.0
0.2
0.8
0.8
0.8
0.9
0.3
0.9
1.0
Rails
Type
Yield
Strength
(MPa)
0.5
DHH
eutectoid
830
1290
14
0.6
0.2
HE370
865
1353
12
0.3
0.9
0.2
HE400
910
1385
12
0.5
0.7
0.2
HE-X
951
1438
11
Hyper
eutectoid
Tensile
Strength
(MPa)
Elongation
(%)
6 Rail life comparison test in the actual track
(Reference)
20
18
₇ comparison of
surface condition
(R=290m)
Rail Life improvement:38%
16
14
Side wear (mm)
1 Chemical composition (Reference)
206
12
284
331
12.7mm
(1/2 inch)
10
8
HE rail
6
4
DHH370 (0.8%C)
HE370 (0.9%C)
2
0
0
100
200
300
400
500
Acumulated passing tonnage (Million Gross Ton)
DHH rail
20
Rail for Heavy Haul (HE rail)
Rail for Heavy Haul (HE rail)
21
Special Rails
Tongue Rails
(Tongue Rails/Crane Rails)
Specification
Chemical composition (%)
Type
80S
70S
50S
Standard
C
Si
Mn
JIS
0.63
0.15
0.70
(JIS E 1101) — 0.75 — 0.30 — 1.10
Mechanical Properties
P
S
0.030
and
under
0.025
and
under
—
EN60E1A1
Zu1-60
Standard
C
Si
Mn
EN
0.15
0.70
(EN13674-1 0.62
—
0.80
—
0.58
— 1.10
R260)
IRS
(IRS T-12
1080HH)
0.60
0.10
0.80
— 0.80 — 0.50 — 1.30
Falling weight test required
drop height 10m
10
and
over
800 and over
Chemical composition (%)
Type
Remarks
Tensile Strength Elogation
(%)
(cm2)
Cu
Falling weight test required
drop height 6.1m
Mechanical Properties
P
S
Cr
Tensile Strength Elogation
(%)
(cm2)
0.025
and
under
0.025
and
under
—
880 and over
10
and
under
0.030
and
under
0.030
and
under
—
1080 and over
10
and
under
Remarks
Falling weight test required
drop height 7.4m
Characteristic and Usage
Characteristic
Typical standard
USAGE
Most suitable for machining into various tougue rails
JIS
Points and crossings
Dimensions and Weights
(70S,50S)
(EN60E1A1
Zu1-60)
C
C
A
t
F
A
F
F
t
c
t
A
e
D
D
C
D
(80S)
B
B
Dimensions (mm)
Type
Sectional Weight
Area
(kg/m)
(cm2)
Center of Gravity
(cm)
B
Radius of Section
Gyration Modulus
Z (cm3)
i (cm)
c
e
Moment of
Inertia
l (cm4)
79.9
(6.99)
(8.91)
(2,704)
(5.15)
(303.0)
(88.5)
69.5
(6.22)
(8.58)
(2,120)
(4.89)
(254.0)
25.0
(65.8)
51.7
(5.87)
(7.63)
(1,430)
(4.66)
(247.0)
44.0
(92.95)
(72.97)
(5.88)
(7.52)
(1,727)
(4.31)
(229.7)
A
B
C
D
F
t
80S
159.0
145.0
65.8
(66.0)
58.875
40.0
(101.8)
70S
148.0
140.0
65.3
(52.0)
68.0
35.0
50S
135.0
127.0
64.0
(41.0)
69.0
EN60E1A1
ZU1-60
134.0
140.0
1)
72.0*
(53.0)
—
For Center of Gravity, c is distance from bottom, e is distance from the top of the head
( ) denotes values not stipulated in specifications but calculated by NSSMC
*1) under 14.3mm from the top of rail head surface
22
Special Rails (Tongue Rails/Crane Rails)
Special Rails (Tongue Rails/Crane Rails)
23
Section
Crane Rails
Point Rails
80S
70S
50S
65.8
32
32.65
15 15
145
(140)
R80
R300
R300
R80
1:40
(41)
135
R8
82
CR100K
CR73K
C
Si
Mn
P
Mechanical Properties
S
0.60
0.10
0.70
0.035
0.040
— 0.75 — 0.30 — 1.10 and under and under
NSSMC Standard
Cu
Tensile Strength Elogation
(cm2)
(%)
—
780 and over
Remarks
8
and over
—
All tensile test uses JIS No4 test piece
2
R1
R3
16
18
18
58
Standard
Type
7 18
25
2
R2
Chemical composition (%)
R13
75 R3
1:2.
R1
R
R2
R3
69
68
7
34.125
6
17
28
R1
1:4
16
(52)
7
12
R1
R3
1:40
R1
23
58.875
40
1:4
.5
25
R
R4
R13
R8
R7
13
R13
148
1:4
.5
R4
1:4
Specification
32
1111
R600
R50
1:40
1:40
R3
R50
R600
R13
(66)
R50
R600
R13
159
64
65.3
32.65
16
63.6
15
42
85
R6
Characteristic and Usage
(127)
Characteristic
Typical standard
USAGE
Can bear a huge load weight with its stable shape.
NSSMC Standard
Cranes
C
e
D
EN60E1A1/Zu1-60
Dimensions and Weights
72.00
49.00
52.053
(20.456)
1:2.7
(39.45)
53.00
0R
5
19
R
.0
134.00
X
28.00 16.00
44.00
1:17
(33.75)
(25.00)
4.0R
3.0R
4.0R
3.0R
Y
55.00
2.74
56.00
19
.0
R
1:4
20.00
19
20.00
3.
Type
.0R
X
58.83
13.0R1
1:2.7
5
.0
19
F
B
Dimensions (mm)
80.0R2
300.0R1
1
0R
3.
R2
Y
1:20
1:20
14.30
80.0R2
13.0R1
c
(74.30)
A
t
A
B
C
D
F
t
CR100K
150.0
155.0
120.0
53.0
65.5
39.0
(127.69)
CR73K
135.0
140.0
100.0
43.0
65.5
32.0
(93.39)
Center of Gravity (cm)
Radius of Section
Gyration Modulus
i (cm)
Z (cm3)
c
e
Moment of
Inertia
l (cm4)
100.2
(7.57)
(7.43)
(3,270)
(5.15)
(303.0)
73.3
(6.69)
(6.81)
(2,000)
(4.89)
(254.0)
Sectional Weight
Area
(kg/m)
(cm2)
For Center of Gravity, c is distance from bottom, e is distance from the top of the head
( ) denotes values not stipulated in specifications but calculated by NSSMC
Section
85.00
140.00
CR 100K
CR 73K
120.0
0
0
1:4
(R6)
(R2)
26.5
(13.0)
(R6)
(R2)
.5
φ
31
.5
φ
28
43.0
27.5
R2
31.5
(17.0)
32.0
135.0
R7
0
155.0
Special Rails (Tongue Rails/Crane Rails)
h
0
1:4
24
R1000
(34.5)
53.0
27.5
39.0
)
10
( R1:4
5.0
65.5
0
R2
)
About C1.5
77.0
130.0
33.0
R7
(R
8
R2
0
R10
150.0
0
R2
0
R10
5.0
65.5
)
10
(R
1:4
33.0
(42.9)
)
R1000
100.0
(R
8
Rail
h
CR 100K
CR 73K
67.0
62.0
140.0
Special Rails (Tongue Rails/Crane Rails)
25
Marking
(JIS E 11001) *JIS Standard are shown for referance, please consult us anytime for original marking.
Standard Rail
Production record will be shown on the rails
Arrow mark to indicate direction of top of ingot or billet
Mark to indicate rail type
Mark to indicate steel furnace type
Trade Mark
Year of manufacture
Month of manufacture
or its abbreviation
Branding
60
50N, 40N
37A
60
LD
2003
5
12 B
T12345
A
70
50N
LD
2003
5
12 B
T12345
A
70
80S
90
Stamping
Branding
50N
HH340, HH370
26
Markings
Serial number of rail
Number of strand/Mark to indicate order of
pouring melt into mould
Heat number
Work gang identification
Carbon content
Manganese content
Grade
60
LD
2003
5
12 B
T12345
A
75 105 HH37
50N
LD
2003
5
12 B
T12345
A
78
Serial number of rail
Number of strand/Mark to indicate order of
pouring melt into mould
Heat number
Work gang identification
Carbon content
Manganese content
Stamping
Branding
Stamping
Arrow mark to indicate direction of top of ingot or billet
Mark to indicate rail type
Mark to indicate steel furnace type
Trade Mark
Year of manufacture
Month of manufacture or
its abbreviation
HH340, HH370
Arrow mark to indicate direction of top of ingot or billet
Mark to indicate rail type
Mark to indicate steel furnace type
Trade Mark
Year of manufacture
Month of manufacture or
its abbreviation
Serial number of rail
Number of strand/Mark to indicate order
of pouring melt into mould
Heat number
Work gang identification
Carbon content
Manganese content
HH Rail
60
Tongue Rails
80S
LD
2003
5
12 B
T12345
A
68
90
70S
70S
LD
2003
5
12 B
T12345
A
68
90
50S
50S
LD
2003
5
12 B
T12345
A
68
T12345
Crane Rails
Heat number
CR 100K
CR 73K
Branding
Stamping
T12345
HH34
Markings
27
Research on Rails
At NSSMC, world-class research and development personnel provided with sophisticated laboratory facilities
constantly make strenuous R & D efforts to offer better
rails and new application technology, including new
welding techniques. To meet the demand of faster high
speed trains and heavier heavy haul railway.
Machines for rail performance testing.
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High speed rail tester（＊）
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rail wear and damage producing tester（＊）
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Heat treatment tester
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Type Nishihara wear tester
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rail damage simulater（＊）
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Rail bend and fatigue tester
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Flash-butt welder
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Rail bend tester
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Falling weight tester
（＊）NSSMC original machines
Rail damage simulator
High speed rail tester
Rail wear and damage producing tester
Rail bend and fatigue tester
28
Research on Rails
Flash-butt welder
29