Silicon steel
1.0 scope
1.1 this specification covers the grain oriented electrical steels are iron-silicon alloys that provide
Low core loss and high permeability needed for more efficient and economical electrical
Transformers. Cold rolled grain oriented (crgo) grades of electrical steel are typically used
For transformer cores and large generators.
2.0application
2.1 the cgro is used regularly for cores in transformers.
3.0standard
3.1 this specification is prepared by taking guidance from bs 601:1973
4.0material
4.1 cold rolled grain oriented (crgo) grade m5, moh, zdkh as per bs 601:1973 and
Equivalent to jis c 2553
5.0properties
5.1 specifications and typical electrical and magnetic properties (see appendix 1)
6.0dimension and tolerance
6.1 dimension : as per the purchase order with the tolerance as given table below
Tolerance on width
Nominal width (mm)
Overup to and includingtolerance (mm)
0150+ 0 0.3
150500+ 0 0.5
001000+ 0 1.5
Tolerance on length
Nominal width (mm)
Overup to and includingtolerance (mm)
02000- 0 + 1.5
2000>2000- 0 + 2.0
Tolerance on length
The tolerance on the mean thickness, measured by contact micrometer, for any coil shall be
0.03 mm from the nominal thickness.
Tolerance on edge burr
The tolerance on edge burr not to exceed 0.05mm.
Tolerance on edge camber
Edge camber is the lateral departure of the edge of the strip from a straight line forming a chord, refer figure a:
Tolerance on edge camber of strip in coil shall not exceed 2 m in 2000 mm and shall be measured against a straight edge using a 2000 mm length cut from a coil.
7.0references
(1) bs 601: 1973, steel sheet and strip magnetic circuits of electrical apparatus.
Packing: 25kg/40kg/50kg , plastic bag inside and carbaord drum outside
Chemical properties: the color is yellow-orange. The relative density is 3.357g/cm3 . It is not soluble in anhydrous ethyl alcohol but can dissolve in acids or alkali. The steam is poisonous and the relative molecular weight is 181.88 .
Quality guarantee :
Advanced technique, completed resource controling system and hard and fast measurement of products , which all make sure of the products stability . Today our products have been sold all over the world like america , german , middle east and so on . We have about twenty years experiences of production and have enjoyed good reputation in this line .Welcome to contact us !
We manufacture ferro alloysall grades of alloy steel, special steel and stainless steel in rounds, flats, squares and profiles in black and bright as per the customer's requirements.
We have started trading of below materials in domestic market.
1: moly oxide / ferro moly
2: nickel
3: low carbon ferro chrome
4: ferro silicon
5: hms
6: shredded scrap
7: ss 304 scrap
8: ss 316 scrap
9: cupro nickel ( 70/30)
10: monel, inwar, inconel, reformer tube ( high nickel/ moly scrap)
