Comparison

1. ‘INDIA’S
LARGEST
STAINLES
S STEEL
PRODUCE
R’
1

2. Inference from the Comparison Data of 210 mm Slab Vs 200 mm Slab
o In 210 mm thick slab segment till 14th July, 18,000 MT material rolled at Steckel Mill
o On Productivity front:-
oProductivity is similar with both Slabs i.e. 110 MT/hr
o In 210 mm slabs productivity loss by 2.5% due to Short length Slabs (<10800
mm)
o In Fuel consumption, approx 2 KG/MT extra fuel consumption with 210 mm slabs rolling
(39 Kg/MT to 41 Kg/MT)
o Roughing Mill roll forces & Main motor Current
o Average Roll force increased by 1.5-2.0 MN in all passes in 210 mm slabs
o Main Motor current Increase up to 1000 ampere in initial passes in 210 mm
slabs & current comes in limit of 10,000 ampere in all passes
o Steckel Mill Roll forces & main Motor current
o Major impact in St-2, Average roll forces increase approx 1.5 MN to 2 MN in 210
mm slabs in all passes
o Stand-2 Average Current & maximum current duration both are in increasing
trend for all passes

3. 210MM SLAB HOT ROLLING DATA-18JUN-21 TO 14TH JULY -21
Series & Grades
<1100 mm 1145 mm >1200 mm Total
No. Of Coils Coil Wt No. Of Coils Coil Wt No. Of Coils Coil Wt No. Of Coils Coil Wt
200 SERIES 27 489 12 238 135 2880 174 3608
JT 12 238 38 807 50 1045
204CU 21 390 24 508 45 898
JSL U DD 39 844 39 844
J4 6 99 22 467 28 566
JSLAUS 7 147 7 147
JSL U SD 5 108 5 108
300 SERIES 93 1626 559 12137 652 13763
304 84 1480 406 8853 490 10333
304L 111 2395 111 2395
316L 22 489 22 489
301 20 399 20 399
321 9 146 9 146
400 SERIES 24 394 12 259 36 652
410S 12 259 12 259
409M/IRSM 12 199 12 199
410 12 195 12 195
Grand Total 144 2509 12 238 706 15276 862 18023

4. Impact of Short Length (210 mm slabs)
Series & Grades No. Of Coils
Coils Weight
(in MT)
Wt. Loss due to
Short Length
(<10800 mm)
(in MT)
% Age
Current
Productivity
(MT/Hr)
Productivity
with full
length Slabs
(MT/Hr)
Productivity
Incresed by
200 SERIES 174 3608 92 2.56% 102 104.6 2.55%
JT 50 1045 21 2.02%
204CU 45 898 23 2.52%
JSL U DD 39 844 13 1.56%
J4 28 566 29 5.10%
JSLAUS 7 147 6 4.02%
JSL U SD 5 108 1 0.62%
300 SERIES 652 13763 320 2.32% 112 114.6 2.32%
304 490 10333 186 1.80%
304L 111 2395 81 3.36%
316L 22 489 4 0.79%
301 20 399 41 10.21%
321 9 146 8 5.73%
400 SERIES 36 652 23 3.50% 100 103.5 3.50%
410S 12 259 7 2.55%
409M/IRSM 12 199 1 0.75%
410 12 195 15 7.59%
Grand Total 862 18023 435 2.41%

5. Productivity Comparison (200 mm Vs 210 mm)
Rolling
Date
Shift Grade Fuel
Total
Coils
210 mm
coils
200 mm
coils
Input
Wt.
Output
Wt.
Productivity
Slab
Thickness
mm mm MT MT MT/hr
210 mm
19-Jun C
304(10)/
EN1.4307(25)
Propane 35 35 0 731 728 114.9
20-Jun A 304
MIX(Propane+
LSHS)
37 36 1 826 823 116.2
21-Jun B 300 MIX Propane 36 28 8 761 759 106.0
25-Jun B 300 MIX Propane 36 30 6 757 755 105.0
25-Jun A 304 Propane 38 26 12 819 817 112.6
29-Jun B JT+JSLAUS
MIX(Propane+
LSHS)
33 31 2 698 694 102.0
06-Jul C 304 Propane+LSHS 37 32 5 820 815 116.0
Total 252 218 34 5412 5390 110.6
200MM
30-Mar C 300 MIX
MIX(Propane+
LSHS)
36 0 36 753 750 114.0
26-Feb C 304
MIX(Propane+
LSHS)
38 0 38 784 782 109.0
18-Feb C 300 MIX
MIX(Propane+
LSHS)
36 0 36 784 782 113.7
24-Feb B JSLUSD Propane 33 0 33 726 726 100.0
Total 143 0 143 3046.5 3040 109.3
In 210 mm Slabs, productivity increases approx 2 MT/Hr (100 MT/hr to 102 MT/hr) in case of
200 series & in 300 series material productivity is similar (112MT/hr)

6. Fuel Consumption Comparison (200 mm Vs 210 mm)
PHF
Avg.
WBF
Avg.
HC
(Avg)
Total Fuel Avg
Rolling
Date
Shift Grade Fuel
Total
Coils
Input
Wt.
Output
Wt.
Slab
Thickness
MT MT Kg/MT Kg/MT Kg/MT Kg/MT Mcal/MT)
210 mm
19-Jun C
304(10)/
EN1.4307(25)
Propane 35 731 728 13.77 29.51 2.80 46.09 491.5
20-Jun A 304
MIX (Propane+
LSHS)
37 826 823 11.98 27.54 2.52 42.04 420.0
21-Jun B 300 MIX Propane 36 761 759 14.01 23.37 2.72 40.10 425.7
25-Jun B 300 MIX Propane 36 757 755 12.72 23.98 2.91 39.60 421.2
25-Jun A 304 Propane 38 819 817 12.97 23.23 2.77 38.98 414.5
29-Jun B JT+JSLAUS
MIX (Propane+
LSHS)
33 698 694 14.79 27.75 3.01 45.55 458.4
06-Jul C 304 Propane+ LSHS 37 820 815 11.95 25.65 2.68 40.29 410.4
252 5412 5390 13.12 25.81 2.77 41.69 433.30
200MM
30-Mar C 300 MIX
MIX (Propane+
LSHS)
36 753 750 9.78 27.09 3.09 39.97 404.0
26-Feb C 304
MIX(Propane+L
SHS)
38 784 782 8.23 27.19 3.33 38.75 381.0
18-Feb C 300 MIX
MIX(Propane+L
SHS)
36 784 782 8.63 25.08 2.97 36.68 393.9
24-Feb B JSLUSD Propane 33 726 726 12.91 25.27 3.60 41.77 444.7
143 3046.5 3040 9.83 26.16 3.24 39.24 405.19
In 210 mm slabs, approx 3 Kg/MT extra fuel consumption in Pre Heating furnace

7. Level-2 & TBT comparison
Level -2 & TBT temperature in 200 mm & 210 mm Materials (>1200 mm)
200 mm Slabs 210 mm Slabs
grade des series Average of LEVEL2
Average of TBT
*C
Average of LEVEL2
Average of TBT
*C
200 SERIES
JT 1049 1044 1053 1049
JSL U DD 1041 1040 1040 1038
204CU 1039 1039 1034 1034
JSL U SD 1046 1043 1038 1036
200 SERIES Total 1046 1043 1040 1038
300 SERIES
304 1055 1047 1043 1041
304L 1040 1038 1036 1033
300 SERIES Total 1053 1046 1041 1039
Grand Total 1050 1045 1041 1039

8. Roughing Mill Roll force & Main motor Current (JTX1275)
27.9
29.4
31.2
32.7
32.7 32.9
28.6
26.5
28.2
30.4
31.3
31.8 31.6
26.4
20.0
25.0
30.0
35.0
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
RM Roll Force 210 mm Slab
200 mm Slab
7925
9125 8905
9650
9473 9600
7900
6775
8675 8900
9600
9313 9498
7025
6000
6500
7000
7500
8000
8500
9000
9500
10000
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
RM Current
210 mm Slab 200 mm Slab

9. Steckel Mill Roll force (JTX1275) – Stand-1
26.4 26.2 26.7
22.6
24.8
27.0
25.0
26.9
26.3
24.4
20.0
25.0
30.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
22.4 21.4
23.3
12.7
17.6
23.8
20.9 22.4 17.8
17.3
10.0
15.0
20.0
25.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

10. Steckel Mill Roll force (JTX1275) – Stand-2
26.2
27.2
26.6
26.4
26.2
26.7
25.4
26.6
26.3
25.7
20.0
25.0
30.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
23.1
24.7
22.8
21.3
18.0
21.6 23.6
21.8
21.2
16.6
10.0
15.0
20.0
25.0
30.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

11. Steckel Main motor Current (JT X1275) – Stand-2
18906
15263
13503
6991
7935
17468
16280
13242
6212
5086
5000
7500
10000
12500
15000
17500
20000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-2 Max Current 210 mm Slab
200 mm Slab
0.39
1.25
0.95
0.57
0.45
0.11
0.12 0.17 0.10 0.13
0.00
0.50
1.00
1.50
Pass1 Pass2 Pass3 Pass4 Pass5
Seconds
Steckel St-2 Max Current Duration 210 mm Slab
200 mm Slab
15565
12210
9356
5011
2569
14641
11627
8888
4345 2035
2000
4500
7000
9500
12000
14500
17000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-2 Average Current 210 mm Slab
200 mm Slab

12. Steckel Main motor Current (JT X1275) – Stand-1
18185.5 16612.0
12296.5
10921.0
5787.5
18781
16954
11141
8705
5460
5000
7500
10000
12500
15000
17500
20000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-1 Max Current 210 mm Slab
200 mm Slab
0.95 1.00
0.50
0.16
0.55
1.63
1.30
0.10 0.20
0.38
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
Pass1 Pass2 Pass3 Pass4 Pass5
Seconds
Steckel St-1 Max Current Duration 210 mm Slab
200 mm Slab
13833
11630 10854 10877
2232
15609
11639
7786
3658
2000
4500
7000
9500
12000
14500
17000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-1 Average Current 210 mm Slab
200 mm Slab

13. Roughing Mill Roll force & Main motor Current (JSLU DD X 1275)
31.5
33.0
35.3
36.3
35.9 36.4
29.7
30.8 31.9
34.6
35.1
35.8 35.6
30.3
20.0
25.0
30.0
35.0
40.0
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
RM Roll Force 210 mm Slab
200 mm Slab
9333
9917 9933
9963
9867 9962 9792
6775
8675 8900
9600
9313 9498
7025
6000
6500
7000
7500
8000
8500
9000
9500
10000
10500
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
RM Current
210 mm Slab 200 mm Slab

14. Steckel Mill Roll force (JSLU DD X1275) – Stand-1
25.7 25.0
26.8
24.2
22.4
22.9
24.3
26.1
25.8
25.8
20.0
22.5
25.0
27.5
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
21.7
22.1
23.4
15.9 16.3
20.1
21.9
21.1
17.2
20.1
15.0
20.0
25.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

15. Steckel Mill Roll force (JSLU DD X 1275) – Stand-2
25.5
26.1 26.6
26.3
24.3
24.1 24.7 25.2
23.6
26.2
20.0
25.0
30.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
22.0
24.8
22.9
21.4 14.9
21.6
23.7
21.6
20.3
19.5
12.5
15.0
17.5
20.0
22.5
25.0
27.5
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

16. Steckel Main motor Current (JSLU DD X1275) – Stand-2
19248
16069
13640
7110
8473
18366
15488
12672
6369 6061
5000
7500
10000
12500
15000
17500
20000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-2 Max Current 210 mm Slab
200 mm Slab
0.5
0.2
0.9
0.8
0.5
0.2
0.2
0.5
0.9
0.2
0.0
0.2
0.4
0.6
0.8
1.0
Pass1 Pass2 Pass3 Pass4 Pass5
Seconds
Steckel St-2 Max Current Duration 210 mm Slab
200 mm Slab
15520
12737
9383
5049
2307
14542
11968
9471
4730
2827
2000
4500
7000
9500
12000
14500
17000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-2 Average Current 210 mm Slab
200 mm Slab

17. Steckel Main motor Current (JSLU DD X1275) – Stand-1
18039 17103
10693
8260
18500
16505
9633
7828
5838
5000
7500
10000
12500
15000
17500
20000
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-1 Max Current 210 mm Slab
200 mm Slab
0.4 0.4
1.0
0.3
0.7
0.1 0.2 0.2 0.1 0.1
0.0
0.5
1.0
1.5
Pass1 Pass2 Pass3 Pass4 Pass5
Seconds
Steckel St-1 Max Current Duration 210 mm Slab
200 mm Slab
13864
11810
7783
3821
2134
11400
11668
7183
3589 2608
2000
4500
7000
9500
12000
14500
Pass1 Pass2 Pass3 Pass4 Pass5
Ampere
Steckel St-1 Average Current
210 mm Slab
200 mm Slab

18. Roughing Mill Roll force & Main motor Current (304X1275)
25.0
27.5
31.0
31.8
32.5
33.3
28.6
23.9
26.4
29.1
31.0
32.4 32.8
27.2
20.0
25.0
30.0
35.0
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
RM Roll Force 210 mm Slab
200 mm Slab
7427
9153
9835
9953
9945 9964
9275
6650
8870
9800
10000
9900 9963
9098
6000
7000
8000
9000
10000
11000
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
RM Current
210 mm Slab 200 mm Slab

19. Steckel Mill Roll force (304X1275) – Stand-1
25.0
22.7
22.7
22.2
26.5
20.4
22.1 22.8
23.6
23.7
20.0
22.5
25.0
27.5
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
20.0
18.2
16.8
15.5
14.2
17.9
17.7
16.7
15.1
14.3
10.0
12.5
15.0
17.5
20.0
22.5
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

20. Steckel Mill Roll force (304X 1275) – Stand-2
23.7
20.8
23.6
21.9
25.8
22.4
23.3
24.0
17.6
23.5
15.0
20.0
25.0
30.0
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Maximum Roll Force 210 mm Slab
200 mm Slab
20.0
18.0
18.8
18.0
13.3
20.5
21.1
17.9 14.8
13.1
12.5
15.0
17.5
20.0
22.5
Pass1 Pass2 Pass3 Pass4 Pass5
MN
Average Roll Force 210 mm Slab
200 mm Slab

22. Roughing Mill Roll force & Main motor Current (304 X 3.5 X1275)
22.90
24.50
26.98
30.20
29.15
30.40
24.95
20.67
23.17
25.89
27.33
28.97 29.27
24.57
20.00
25.00
30.00
35.00
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
304 X 3.5mm X 1275 – RM Roll Force 210 mm Slab
200 mm Slab
6870
7734
8216
8887
8551
9027
6240
5752
6910
7835
8531 8549
8812
5992
5000
6000
7000
8000
9000
10000
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
304 X 3.5mm X 1275 – RM Current
210 mm Slab
200 mm Slab

23. Roughing Mill Roll force & Main motor Current (304 X 2.5 X1275)
19.93
20.77
24.23 23.59
26.23 26.80
21.97
18.54
21.81
23.48
25.02 25.38
26.28
21.50
15.00
20.00
25.00
30.00
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
RM Roll Force 210 mm Slab
200 mm Slab
6013
6220
7529
7871
8058
8596
5127
6460
7483
8408 7974
8410
5151
5000
6000
7000
8000
9000
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
RM Current
210 mm Slab
200 mm Slab

24. Roughing Mill Roll force & Main motor Current (304 X 2.0 X1275)
19.04
20.06
23.40
23.15
25.61 26.27
21.46
17.71
20.40
22.72
24.22
24.78 24.53
20.10
15.00
20.00
25.00
30.00
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
MN
RM Roll Force 210 mm Slab
200 mm Slab
5859 6044
7354
7867
7933
8459
6004
6868
8233
7643
7948
5000
6000
7000
8000
9000
Pass1 Pass2 Pass3 Pass4 Pass5 Pass6 Pass7
Ampere
RM Current
210 mm Slab
200 mm Slab