S.

No.

Description of Material as per
Specification

Tensile Strength

(U.T.S) (Mpa)

Elongation

(%)

Yield Stress

(Mpa)

Charpy

Impact (J)

Bend

Test

Remarks

1.

Specified Value IRS  T 10,

 IS 2062: 2011 Gr. E250

Quality : BR

410 Mpa (min.)

23% (min.)

250 Mpa min

(< 20mm)

240 Mpa min (20- 40mm)

27J

 (min.)

2t

MS
Plates for M.S.Bracket

 RDSO/T-6905, RDSO/T-6906, RDSO/T-6907 &
RDSO/T-6908

Plate Size 14mm

Plate Size 16mm

Plate Size 20mm

Plate Size 25mm

452

460

468

465

27

28

26

28

268

266

273

275

30

29

28

31

OK

Satisfactory

2.

Specified Value IRS  T 10,

 IS 2062: 2011 Gr. E250

Quality : A

410 Mpa (min.)

23% (min.)

24 Kgf/mm² (Min)

—–

45°  

Plate
Screw

RDSO/T-3915,
RDSO/T-3916

448

438

26

28

25

26

NA

OK

Satisfactory

3.

Specified
ValueIRS  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. – 12kg.

Drifting

 1.5 times of original dia.

(No crack)

Remarks

 Track Bolts & Nuts assembly

RDSO/T-6910,RDSO/T-6911,
RDSO/T-8604

60

59

62

NA

9

8

8

NA

Satisfactory

Track
Bolts

RDSO/T-6910,RDSO/T-6911,
RDSO/T-8604

NA

OK

NA

NA

Satisfactory

Track
Nuts

RDSO/T-6910,RDSO/T-6911,
RDSO/T-8604

NA

NA

NA

OK

Satisfactory

4.

Specified
ValueIS 1367 Part-3

Tensile Strength (U.T.S)

1040 Mpa (min.)

Elongation (%)

9% (min)

Proof Load

381 Mpa

Wedge

Test

6⁰

Hardness

32-39 RC

Remarks

H.T.S  Bolt ( P. Cl. 10.9 )

RDSO/T-6909      (From Lot)

1088

13

OK

OK

34

Satisfactory

H.T.S  Bolt ( P. Cl. 10.9 )

RDSO/T-6909

(From
Assembled Imp. SEJ)

1085

12

OK

OK

36

Satisfactory

5.

Specified
ValueIS 1367 Part-6

Hardness  27-36 HRC

Remarks

H.T.S
Nut  ( P. Cl. 12)

RDSO/T-6909   (From Lot)

32, 30

Satisfactory

H.T.S
Nut  ( 12 )

RDSO/T-6909

(From
Assembled Imp. SEJ)

33, 34

Satisfactory

6.

Specified
Value IS  6649

Gr.45 C
8

Hardness

35- 45 HRC

Remarks

Hardened
Taper Washer

RDSO/T-6912, RDSO/T-6913

42, 39

Satisfactory

7.

Specified
Value IRS-42/

 IS 
4072 Gr. 55Si7

Hardness

43- 49 RC

Flattening Test

Decrease height <0.5mm

Twist Test

No sign of fracture through an
angle of 90⁰

Depth
of De-curb

0.10 max

Decompression Test

Remarks

Single
Coil Spring Washer

T-10773

46

OK

OK

OK

OK

Satisfactory

8.

Specified
Value IS:210 Gr.FG200

Hardness

180 – 220 BHN

Tensile Strength (U.T.S) 200
Mpa min.

Remarks

C.I.
Chair

RDSO/T-6904

195

234

Satisfactory