IS 648 (2006): Cold rolled non-oriented electrical steel sheet and … · 2018-11-15 · AMENDMENT...
Transcript of IS 648 (2006): Cold rolled non-oriented electrical steel sheet and … · 2018-11-15 · AMENDMENT...
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है”ह”ह
IS 648 (2006): Cold rolled non-oriented electrical steelsheet and strip - Fully processed type [MTD 4: WroughtSteel Products]
AMENDMENT NO. 5 NOVEMBER 2012TO
IS 648 : 2006 COLD ROLLED NON-ORIENTEDELECTRICAL STEEL SHEET AND STRIP — FULLY
PROCESSED TYPE — SPECIFICATION
(Fifth Revision)
[Foreword, Para 3, Sl No. (e)] — Substitute the following for the existing:
‘e) Number of grades with this amendment will be thirty eight.’
[Page 3, Table 1 (see also Amendment No. 2 and 3)] — Insert thefollowing new grades in the existing table at the end:
Table 1 Designation of Electrical Steel Grades(Clauses 4, 6.1.3,7.1.1.2,7.1.2.1, 7.1.2.4.1 and 9.2)
MaximumCore Loss at
50 Hz(W/kg)
a.c. Magnetization(50 Hz)
Minimum values of BMax Tesla
SlNo.
Designation NominalThickness
mm
1.0 T 1.5 T 2 500A/m
5 000A/m
10 000A/m
Anisotropyof Total
Specific Losat 1.5 T(% Max)
No. ofBends(Min)
Assumeddensitykg/dm3
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)xxxii 35C230 0.95 2.30 1.49 1.60 1.70 ±17 2 7.60xxxiii 35C235
0.350.95 2.35 1.49 1.60 1.70 ±17 2 7.60
xxxiv 50C940 0.50 4.20 9.40 1.62 1.72 1.81 ±8 10 7.85xxxv 65C310 0.65 1.25 3.10 1.49 1.60 1.70 ±15 2 7.60xxxvi 100C600 2.60 6.00 1.53 1.63 1.72 ±10 2 7.60
xxxvii 100C700 3.00 7.00 1.54 1.64 1.73 ±8 3 7.65xxxviii 100C800
1.00
3.60 8.00 1.56 1.66 1.75 ±6 5 7.70
NOTE — a.c. magnetization can be checked and reported in any value between 5 000 to10 000 A/m as per mutual agreement apart from above (2 500, 5 000 and 10 000 A/m).
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Amend No. 5 to IS 648 : 2006
(Page 4, clause 7.2.4) — Substitute the following for the existing clause:
‘7.2.4 Material when supplied with insulation, the nature of the insulation andits properties shall be subject to mutual agreement between the purchaser andthe manufacturer.’
(Page 4, clause 7.2.5) — Delete.
(MTD 4)Reprography Unit, BIS, New Delhi, India
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AMENDMENT NO. 4 OCTOBER 2011TO
IS 648 : 2006 COLD ROLLED NON-ORIENTEDELECTRICAL STEEL SHEET AND STRIP — FULLY
PROCESSED TYPE — SPECIFICATION( Fifth Revision )
(Page 4, clause 7.1.2.1) — Substitute the following for the existing:
‘The specified values of maximum total specific loss at 50 Hz to be guaranteed at1.5 T shall be as given in Table 1. They apply.
– for the thicknesses 0.35 mm, 0.50 mm and 0.65 mm to aged test pieces– for the thickness 1.00 mm to non-aged test pieces
The values of the specific total loss at 1.0 T given in Table 1 are for informationonly.
NOTE — The ageing shall be carried out as specified in IS 649.’
(Page 4, clause 7.1.2.3) — Delete.
(Page 4, clause 7.2.5) — Substitute the following for the existing:
‘The minimum values for insulation resistance of coatings types C-3, C-4, C-5,C-6 and C-7 of Annex C shall be as given in Table 2.’
(Page 4, Title of Table 2) — Substitute the following for the existing:
‘Minimum Values for Insulation Resistance’
(MTD 4)
Reprography Unit, BIS, New Delhi, India
AMENDMENT NO. 2 MARCH 2009
TO
IS 648 : 2006 COLD ROLLED NON-ORIENTED ELECTRICAL STEEL SHEET
AND STRIP ― FULLY PROCESSED TYPE ― SPECIFICATION
( Fifth Revision )
[Page 3, Table 1, Sl No. (xvii)] ― Insert the following after Sl No. (xvii) and renumber the
subsequent serial numbers and add the note at the end of the existing table:
Maximum Core
Loss at 50 Hz
(W/kg)
a.c. Magnetization (50 Hz)
Minimum Values of B Max
Tesla
Sl No. Designation Nominal
Thickness
mm
1.0 T 1.5 T 2 500
A/m
5 000
A/m
10 000
A/m
Anisotropy of
Total Specific
Loss at 1.5 T
(% Max)
No. of
Bends
(Min)
Assumed
Density
kg/dm2
xviii) 50C900 3.8 9.00 1.61 1.70 1.78 ± 10 10 7.80
xix) 50C1000 0.50
4.4 10.00 1.62 1.72 1.81 ± 10 10 7.85
NOTE ― a.c. magnetization can be checked and reported in any value between 5 000 to 10 000 A/m as per mutual agreement,
apart from above (at 2 500, 5 000 & 10 000 A/m).
(Page 4, clause 6.3.1) ― Substitute the following for the existing:
‘The surface shall be smooth and clean, free from grease and rust (the same should not be confused with
some coloration of insulation coating inherent in manufacturing process). Dispersed defects such as
scratches, blisters, aesthetic type physical damages, etc, are permitted if they are within limits of thickness
tolerance and not detrimental to method of working or correct use of supplied material. The limit,
classification and disposition shall be subject to agreement between the purchaser and the manufacturer.’
(MTD 4)
Reprography Unit, BIS, New Delhi, India