ITR of Screw Clamp for Fish plate RT- 5856

ITR of Screw Clamp for Fish plate RT- 5856

1.  Specification/Drawing        : RDSO Drg. No T- 5856
Alt. Nil;

 
IRS M-37/1964 (Incorporating
Corrigendum No. 1 to 3) & IRS T-6

 

2.  Date of Inspection              :

 

3.  Size of Lot                          :       

 

S. No.

Parameter

Value Specified

Observations

Remarks

(a)

Visual

Material
should be free from visual surface defects, sharp edges and other harmful
defects.

 

Leaf
spring to be welded with screw clamp body (6mm fillet weld)

 

Checked
& Found Satisfactory

Satisfactory

(b)

Dimensional

As
per Drg No. RT-5856 Alt.-Nil

Sheet
Enclosed

Dimensional
Sheet attached

 

 

 

(c)

Physical
verification of components in Screw Clamp Assembly

As
per Drg No. RT-5856 Alt.-Nil

 

 i) Screw Clamp body- IRS M-37

 

ii)
Leaf spring- IS:3195 Gr. 55Si7

    (welded with arm’s end of clamp)

 

iii)
Hex. Bolt & Nut  M33- IS:1363

 

iv)
M.S. Ring & M.S. Washer

 

Sheet
Enclosed

Satisfactory

S. No.

Parameter

Value Specified

Observations

Remarks

(d)

Screw Clamp

 

 

d.1

Chemical
composition

As
per Cl. 3.1 of IRS
M-37/1964
(Corrigendum No. 1 to 3)

 

%S-
0.06 (max)

%P-
0.06 (max)

 

Sheet
Enclosed

Test
method-

As
per relevant parts of IS:228

 

 


e.1

Chemical
test

As
per IS:3195/92 Grade 55Si7

(Reaffirmed
2001)

 

Sheet
Enclosed

Test
method-

As
per relevant parts of IS:228 or any other established instrumental/ chemical
method.

 

 

Ladle Analysis

 

 

%C   0.50-0.60

%Si  1.50-2.00

%Mn 0.80-1.00

%S   0.040 max.

%P   0.040 max.

Check Analysis Permissible Variation

%C       ±0.03

%Si      ±0.05

%Mn    ±0.04

%S      +0.005

%P      +0.005

 

 

e.2

Hardness

As
per Drg. RT-5856

 

30-35
HRC

 

OR

 

As
per IS:3195/92 Grade 55Si7

(Reaffirmed
2001)

 

Sheet
Enclosed

Test
method-

As
per IS:1500

 

S. No.

Parameter

Value Specified

Observations

Remarks

(f)

Hexagonal Bolt & Nut
M33

 

 

f.1

Property
Class & thread

For
Hexagonal Bolt as per IS:1363 (*Part-2)/2002

 

For
Hexagonal Nut as per IS:1363 (*Part-3)/2002

Sheet
Enclosed

Property Class for Bolt 4.8 & Nut 5

(g)

M.S.
Washer & M.S. Ring

Material
**specification not specified in RDSO
Drg. No T- 5856
Alt.-Nil

 

Sheet
Enclosed

IS 2062-2011, E-250A

(h)

Marking

Part
No. RT-5856 to be stamped 6mm high at location specified in drawing.

 

RT-5856

 

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