RAW MATERIALS
2.1 AN INTRODUCTION:
The raw material is the first requirement to start the production as per planning. For an economical production the raw material should be of good quality and should be of the required specifications.
The raw material used in STELCO is hot rolled coils, which are imported from Jamshedpur. The hot rolled coils are inspected in the chemical analysis lab for the content of carbon and manganese. The hot rolled coils are bigger in size, which are then slitted as per required width by H.R. slitting machine.
GRADE
C%
Mn%
Si%
P%
C-40
0.35-0.45
0.50-0.70
0.15-0.35
0.04-0.04
C-55
0.50-0.60
0.50-0.80
0.15-0.35
0.04-0.04
C-60
0.55-0.65
0.50-0.80
0.15-0.35
0.04-0.04
C-80
0.75-0.85
0.60-0.90
0.15-0.35
0.04-0.04
C-120
1.1-1.3
0.60-0.90
0.15-0.35
0.04-0.04
Width-As per the requirement of the customer.
2.2 DUCTILITY OF PLAIN CARBON STEELS
Carbon Content
Elongation in tensile test
Nil
0.2
0.4
0.6
0.8
1.2
42%
37%
31%
22%
17%
03%