RAIL SPECIFICATIONS AND RAIL CORROSION
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Grade |
C |
Mn |
Si |
S (Max.) |
P (Max.) |
Al (Max.) |
Others (Max) |
Hydrogen Content Liq (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 |
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Carbon |
0.60-0.80 |
Silicon |
0.10-0.50 |
|
Manganese |
0.80-1.30 |
Aluminum |
0.015 |
|
Phosphorus |
0.030 |
Niobium |
0.04 |
|
Sulphur |
0.030(max) |
Hydrogen(max) |
1.6 |
|
Mechanicalย Properties |
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UTS (Mpa) |
880 |
Yield Strength (Mpa) |
540 |
|
Elongationย (% ) |
10.0 |
Hardness (BHN) |
260 |
Chemical Compositionย ย ( %)ย |
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Carbon |
0.60-0.80 |
Silicon |
0.10-0.50 |
|
Manganese |
0.80-1.30 |
Aluminum |
0.015 |
|
Phosphorus |
0.030 |
Vanadium |
0.20 |
|
Sulphur |
0.025(max) |
Hydrogen(max) |
1.6 |
|
Mechenicalย Properties |
||||
UTS (Mpa) |
880 |
Yield Strength (Mpa) |
630 |
|
Elongationย (% ) |
9.0 |
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 |
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 |
920.27 |
569 |
0.618 |
13.97 |
266 |
V |
981 |
652.5 |
0.665 |
10.67 |
285 |
110 |
1110 |
738 |
0.665 |
10.80 |
345 |
C-Mn |
880 |
460 |
0.522 |
10.00 |
260 |
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 |
42.0* |
0.00135 |
25-65 |
5-12 |
0.30-0.38 |