RAIL SPECIFICATIONS AND RAIL CORROSION: RAIL SPECIFICATION, Rail Sections, Iron from Iron Ore, Structures of Steel, CHEMICAL COMPOSITION OF RAIL STEELS, MECHANICAL PROPERTIES OF RAIL STEELS, MARKING ON RAIL and Stresses in Rail

RAIL SPECIFICATIONS AND RAIL CORROSION




























Grade

C

Mn

Si

S

(Max.)

P

(Max.)

Al

(Max.)

Others

(Max)

Hydrogen

Content
in

Liq
Steel

(Max.)

880

0.60-0.80

0.80-1.30

0.10-0.50

0.030

0.030

0.015

โ€”

1.6 ppm

1080

Cr

0.60-0.80

0.80-1.20

0.50-1.10

0.025

0.025

0.004

0.20 Mo+ .8-1.2 Cr+ .2V

1.6 ppm

1080 HH

0.60-0.80

0.80-1.30

0.10-0.50

0.030

0.030

0.015

โ€”

1.6 ppm



Grade

UTS

(min)

(MPa)

Yield Strength (min) (Mpa)

Running surface hardness (BHN)

Elongation (min)

(Percent)

880

880

460

Min 260

10.0

1080Cr

1080

560

320-360

9.0

1080HH

1080

460

340-390

10.0
















































































Chemical Compositionย ย  ( %)ย 

Carbon

0.60-0.80

Silicon

0.10-0.50

Manganese

0.80-1.30

Aluminum

0.015
(max)

Phosphorus

0.030
(max)

Niobium

0.04
(max)

Sulphur

0.030(max)

Hydrogen(max)

1.6
ppm

Mechanicalย  Properties

UTS (Mpa)

880
(min)

Yield Strength (Mpa)

540

Elongationย  (% )

10.0
(min)

Hardness (BHN)

260





Chemical Compositionย ย  ( %)ย 

Carbon

0.60-0.80

Silicon

0.10-0.50

Manganese

0.80-1.30

Aluminum

0.015
(max)

Phosphorus

0.030
(max)

Vanadium

0.20
(max)

Sulphur

0.025(max)

Hydrogen(max)

1.6
ppm

Mechenicalย  Properties

UTS (Mpa)

880
(min)

Yield Strength (Mpa)

630

Elongationย  (% )

9.0
(min)

Hardness (BHN)

260



Type of Rail

UTS (MPa)

YS (MPa)

%EL

Hardness(BHN)

Cu-Mo Rails

1119.1

831.3

11.1

298.1

NCC
Rails

1040

683

12.03

314

C-Mn Rails

880

460

10.0

260

Rail Type

K1cย  (MPa m1/2)

Endurance Limit

ย (strain at 10 million cycles)

Co-Mo Rails

49.67*

0.00152

NCC Rails

35.52#

0.00154

C-Mn rails

42*

0.00135





Rail Type

UTS (MPa)

YSย  (MPa)

YS/UTS

% Elongation

Hardness(BHN)

Nb
Rails

920.27

569

0.618

13.97

266

V
Rails

981

652.5

0.665

10.67

285

110
UTS Rails

1110

738

0.665

10.80

345

C-Mn
rails

880

460

0.522

10.00

260
(Min)

Rail Type

K1c

(MPa mยฝ)

Endurance Limit (strain at 10 million cycles)

Prior austenite grain size (ฮผm)

Pearlite colony size, (ฮผm)

Inter lamellar spacing (ฮผm)

Nb Rails

48.0*

0.00164

20-30

3-6

0.13-0.20

V Rails

43.0*

0.00174

โ€“

โ€“

0.16

110 UTS Rails

31.0#

0.00139

โ€“

โ€“

โ€“

C-Mn
rails

42.0*

0.00135

25-65

5-12

0.30-0.38






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