Final Stage
M & C Test Report for Curved Improved Switch Expansion Joint (65mm Max.
Gap) for B.G. 60kg UIC on PSC Sleepers for Curves >2º to 4º as per Drawing
No. RDSO/T–8926
(CHEMICAL)
|
SL. No. |
Description of Material as per |
C % |
Mn % |
S % |
P % |
Si % |
B % |
|
1. |
Specified Value IS 1875 Cl-3/ IRS T-23 |
0.25-0.35 |
0.60-0.90 |
0.040 Max. |
0.040 Max. |
0.15-0.35 |
N.A |
| Track Bolt
RDSO/T-2659,RDSO/T-2660 |
0.322 0.291 |
0.740 0.767 |
0.013 0.026 |
0.021 0.026 |
0.250 0.221 |
— |
|
| Specified Value IS 1875 Cl-2A /IRS T-23 |
0.20-0.30 |
0.60-0.90 |
0.040 Max. |
0.040 Max. |
0.15-0.35 |
N.A |
|
| Track Nut
RDSO/T-2659,RDSO/T-2660 |
0.271 0.221 |
0.744 0.765 |
0.024 0.024 |
0.025 0.027 |
0.263 0.233 |
— |
|
|
2. |
Specified Value IRS T- 10, IS 2062, Gr. E250 Quality : BR |
0.22 Max. | 1.50 Max. |
0.045 Max. |
0.045 Max. |
0.40Max. |
N.A |
| MS Plates for M.S. Bracket
RDSO/T-6924, Plate Size 20mm Plate Size 25mm |
0.186 0.205 |
0.971 0.905 |
0.017 0.026 |
0.022 0.021 |
0.241 0.253 |
— |
|
|
3. |
Specified Value IS 1367 Part-3 |
0.20– 0.55 |
N.A |
0.035 |
0.035 |
N.A |
0.003 |
| H.T.S Bolt 24dia x 90 ( P. Cl. 10.9 )
RDSO/T-8518 (From |
0.409 |
— |
0.0079 |
0.013 |
— |
0.0015 |
|
| H.T.S Bolt 24dia x 90 ( P. Cl. 10.9 )
RDSO/T-8518 (From assembled Imp. SEJ) |
0.339 |
— |
0.021 |
0.023 |
— |
0.002 |
|
| Specified Value IS 1367 Part-6 |
0.58 Max. |
0.3 min. |
0.058 Max. |
0.048 |
N.A |
N.A |
|
| H.T.S Nut (P. Cl. 10)
RDSO/T-8518 (From |
0.339 |
0.758 |
0.0054 |
0.017 |
— |
— |
|
| H.T.S Nut (P. Cl. 10)
RDSO/T-8518 (From assembled Imp. SEJ) |
0.341 |
0.475 |
0.033 |
0.031 |
— |
— |
|
|
4.
|
Specified Value IS 6649 Gr.45 C 8 |
0.40-0.50 |
0.60-0.90 |
0.060 Max |
0.060 Max |
NA |
N.A |
| Hardened Taper Washer RDSO/T-8514 |
0.477 0.451 |
0.790 0.691 |
0.013 0.033 |
0.036 0.031 |
|
— |
|
|
5. |
Specified Value IRS T- 10, IS 2062,Gr. E250 Quality : BR |
0.23 Max | 1.50 Max |
0.045 Max |
0.045 Max |
0.40Max |
N.A |
| Angle Tie
RDSO/T-6927 |
0.187 |
0.847 |
0.016 |
0.019 |
0.238 |
— |
(PHYSICAL)
|
S. No. |
Description of Material as per |
Tensile Strength (U.T.S) (Mpa) |
Elongation (%) |
Yield Strength (Mpa) |
Impact |
Bend Test |
Remarks |
|
1. |
Specified Value IRS T 10, IS 2062,Gr. Quality : BR |
410 Mpa (min.) |
23% (min.) |
250 Mpa min (< 20mm) 240 Mpa min (20- 40mm) |
27J ( min.) |
2T (No crack) |
|
| MS Plates for M.S. Bracket
RDSO/T-6924, RDSO/T-6925, RDSO/T-6926 Plate Size 20mm Plate Size 25mm |
570 563 |
28.4 24.8 |
393 370 |
28 30 |
OK |
Satisfactory |
|
|
2. |
Specified Value IRS T 23/IS-1875 , Cl 3 (Bolt), Cl 2A (Nut) |
Tensile Strength (U.T.S) 55 – 68 Kgf/mm2 |
Head Soundness At 300 No Crack |
Unscrewing 2kg. Min. – 12kg Max. |
Drifting 1.5 times of original dia. (No crack) |
Remarks
|
|
| Track Bolts & Nuts assembly
RDSO/T-2659,RDSO/T-2660 |
59 |
NA |
8 |
NA |
Satisfactory |
||
| Track Bolts
RDSO/T-2659,RDSO/T-2660 |
NA |
OK |
NA |
NA |
Satisfactory |
||
| Track Nuts
RDSO/T-2659,RDSO/T-2660 |
NA |
NA |
NA |
OK |
Satisfactory |
||
|
3. |
Specified Value IS 1367 Part-3 |
Tensile Strength (U.T.S) 1040 Mpa (min.) |
Proof Load 293 Mpa Min. |
Wedge Test 40 |
Hardness 32-39 RC |
Remarks |
|
| H.T.S Bolt ( P. Cl. 10.9 ) RDSO/T-8518 (From Lot) |
1092 |
OK |
OK |
36 |
Satisfactory | ||
| H.T.S Bolt ( P. Cl. 10.9 ) RDSO/T-8518 (From |
1093 |
OK |
OK |
35 |
Satisfactory | ||
| Specified Value IS 1367 Part-6 |
Hardness |
Remarks |
|||||
| H.T.S Nut ( P. Cl. 10) RDSO/T-8518 (From Lot) |
31 |
Satisfactory |
|||||
| H.T.S Nut ( P. Cl. 10) RDSO/T-8518 (From |
32 |
Satisfactory |
|||||
|
4. |
Specified Value IS 6649 Gr.45 C 8 |
Hardness35- 45 HRC |
Remarks |
||||
| Hardened Taper Washer
RDSO/T-8514, |
38 |
Satisfactory |
|||||
|
5.
|
Specified Value IS:210 Gr.FG200 |
Hardness 160 – 220 BHN |
Tensile Strength (U.T.S) 200 MPa min. |
Remarks |
|||
| C.I .Chair
RDSO/T-6923, |
178 |
219 |
Satisfactory | ||||
|
6. |
Specified Value IRS T 10, IS 2062 Gr. Quality : BR |
Tensile Strength (UTS) 410 Mpa (min.) |
Elongation 23% (min.) |
Yield Strength 250 Mpa min (< 20mm)
|
Bend Test 2T (No crack) |
Remarks | |
| Angle Tie
RDSO/T-6927 |
484 |
27.6 |
346 |
OK |
Satisfactory | ||
Note:
Test values confirms to specified values of relevant specifications.
NDT
MAGNETIC PARTICAL TESTING (as per IS 3703/ Latest):
i) Material: Thick web switch expansion joint
ii) Method used: Wet
iii) Magnetization technique: Yokes (30 cm.
pole spacing)
iv) Type of Magnetization: Longitudinal
v) Type of Current: HWDC
vi) Application of magnetizing current:
Continuous method
vii) Magnetic Particle used: Non-fluorescent
wet magnetic particles
viii) Inspection Medium: under white light
ix) Checking the adequacy & direction of
magnetization: By Magnetic Field Indicator
|
Sl No. |
Rolling Mark |
Heat No. |
Observation |
Remarks |
||
| Head Top | Head Side | Web | ||||
|
1 |
R260 60 EI 0 SAIL VI/2022 |
C 847870 |
OK |
OK |
OK |
ACCEPTED |
|
2 |
R260 60 EI 0 SAIL VI/2022 |
C 848288 |
OK |
OK |
OK |
ACCEPTED |
|
3 |
R260 60 EI 0 SAIL VI/2022 |
C 847870 |
OK |
OK |
OK |
ACCEPTED |
|
4 |
R260 60 EI 0 SAIL VI/2022 |
C 848288 |
OK |
OK |
OK |
ACCEPTED |
Note: MPT has been carried out as
per acceptance limit specified in QAP
