IEC 60404-8-6:1999/AMD1:2007

INTERNATIONAL IEC
STANDARD
CEI
60404-8-6
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
2007-04
Amendment 1
Magnetic materials –
Part 8-6:
Specifications for individual materials –
Soft magnetic metallic materials

Amendement 1
Matériaux magnétiques –
Partie 8-6:
Spécifications pour matériaux particuliers –
Matériaux métalliques magnétiquement doux
Reference number
Numéro de référence
IEC/CEI 60404-8-6 Amend. 1:2007

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INTERNATIONAL IEC
STANDARD
CEI
60404-8-6
NORME
INTERNATIONALE
AMENDEMENT 1
AMENDMENT 1
2007-04
Amendment 1
Magnetic materials –
Part 8-6:
Specifications for individual materials –
Soft magnetic metallic materials

Amendement 1
Matériaux magnétiques –
Partie 8-6:
Spécifications pour matériaux particuliers –
Matériaux métalliques magnétiquement doux
PRICE CODE
H
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 60404-8-6 Amend. 1 © IEC:2007
FOREWORD
This amendment has been prepared by IEC technical committee 68: Magnetic alloys and steels.
The text of this amendment is based on the following documents:
CDV Report on voting
68/325A/CDV 68/328/RVC
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Page 13
4.3 Alloy class E (nickel-iron)
Replace the whole text with the following sentence:
“These alloys are classified according to the shape of the hysteresis loop and the minimum
amplitude permeability in an a.c. measurement (50 Hz or 60 Hz), under sine flux conditions, with
a S.W. specimen made of material with a thickness of 0,10 mm.”

Page 17
7.1 Magnetic properties
Replace paragraph 2 with the following text:
“The properties shall meet the magnetic requirements specified in Tables 2 to 4 for the alloy, the
magnetic grade and the thickness specified in the order. For intermediate thicknesses not given
in the table, the values for the next thicker group shall apply. When a.c. magnetic testing is used
to demonstrate conformance of the alloy to this standard, either amplitude permeability
measurements (Table 2a) or serial inductance permeability measurements (Table 2b) can be
used. It is not a requirement of this standard that both methods must be used. The method used
shall be subject to agreement between the manufacturer and the purchaser.“

Delete paragraphs 3 and 4.
60404-8-6 Amend. 1 © IEC:2007 – 3 –
7.2.1.4 Edge camber
Replace items a) to c) with the following sentence:
“The edge camber shall be as agreed between the manufacturer and the purchaser.“

Page 21
8.3.2 Magnetic testing, a.c. methods
Replace the text the with following sentences:
“Measurement of a.c. flux density and permeability shall be in accordance with IEC 60404-2 and
IEC 60404-6. Unless otherwise specified, a test frequency of 50 Hz or 60 Hz shall be used.
When amplitude permeability measurements are made, the test conditions shall conform to sine
flux (sine B). When inductance permeability measurements are made, the serial inductance
permeability shall be measured.”
Page 23
Table 1
Replace the existing table with the following new table:
Table 1 – Chemical composition of the alloy classes in accordance with IEC 60404-1
a
Constituents Typical compositions
in Mass fraction in %
Alloy
accordance
class
with
Co Cr Cu Mo Ni Si V
IEC 60404-1
A 100 Fe – – – – – – –
C1 0 – 5 Si – – – – – 2 – 4,5 –
C21 0,4 – 5 Si – – – – – 1 – 4,5 –
C22 3 Si – – – – – 2,5 – 3,5 –
– 2 – 3 1 – 6 – 75 – 80 – –
E1 70 – 85 Ni – – 1 – 6 3 – 5 75 – 80 – –
– – – 3,5 – 6 79 – 82 – –
E2 54 – 68 Ni – – – – 53 – 65 – –
E3 41 – 51 Ni – – – – 42 – 49 – –
E4 35 – 40 Ni – – – – 36 – 40 – –
F1 47 – 50 Co 47,5 – 50 – – – – – 1,7 – 2,5
F2 35 Co 34,5 – 36 – – – – – –
F3 23 –27 Co 23 – 28 – – – – – –
Typical compositions of each alloy class are shown as the examples and other compositions are acceptable if the
magnetic property requirements in this standard are satisfied.

a
Remainder: iron.
– 4 – 60404-8-6 Amend. 1 © IEC:2007
Page 25
Table 2
Replace the existing table with the following new tables:
Table 2 – Minimum permeability requirements
Table 2a – Minimum amplitude permeability requirements for sheet and strip -
AC measurement (50 Hz or 60 Hz), sine flux conditions, thickness 0,05 mm to 0,38 mm
Alloy Magnetic Measuring Specimen Minimum amplitude permeability
a
class grade point for a thickness, in millimetres, of
ˆ
H(A / m)
0,35 0,20
A As agreed between manufacturer and purchaser
C1 As agreed between manufacturer and purchaser
C21 –9 900 750
1,6 L.R.
C22 –13 1 300 -–
Alloy Magnetic Measuring Specimen Minimum amplitude permeability
a
class grade point for a thickness, in millimetres, of
ˆ
H(A / m)
0,30 – 0,38 0,15 – 0,20 0,10 0,05
–30 20 000 20 000 18 000 16 000
–60 40 000 40 000 35 000 30 000
E11 0,4
–100 50 000 60 000 60 000 50 000
–200 100 000 120 000 120 000 100 000
–4 L.R. 4 000 4 000 4 000 4 000
E31 0,4
–6 6 000 6 000 6 000 6 000
–10 10 000 10 000 8 000 8 000
–2 2 200 2 200 2 200 2 200
E41 0,8
–3 2 900 2 900 2 900 2 500
–30 b 30 000 30 000 30 000
b
–60 60 000 60 000 60 000
E11 0,4
–100 b 80 000 100 000 100 000
–200 b 160 000 200 000 200 000
–4 S.W. b 4 000 4 000 4 000
E31 –6 0,4 b 6 000 6 000 6 000
–10 b 10 000 10 000 10 000
–2 b 2 200 2 200 2 200
E41 0,8
–3 b 2 900 2 900 2 500
E21
As agreed between the manufacturer and the purchaser
E32
F1
F2 As agreed between the manufacturer and the purchaser
F3
a
The second digit of the alloy class stands for the shape of the hysteresis loop:
1 = round (non-oriented);
2 = rectangular (oriented).
b
Type S.W. should not be used in this thickness range.

60404-8-6 Amend. 1 © IEC:2007 – 5 –
Table 2b – Minimum serial inductance permeability requirements for sheet and strip –
AC measurement (0,3 kHz, 1 kHz, 3 kHz, 10 kHz and 30 kHz), thickness 0,025 mm to 0,35
mm
Measuring Minimum a.c. inductance permeability
point for a thickness, in millimetres, of
Measuring
Alloy Magnetic
a Specimen frequency
class grade
ˆ
( A/m) kHz
H
0,35 0,20 0,15 0,10 0,05 0,025

0,3 12 000 24 000 27 000 30 000 – –
L.R. 1 4 800 10 000 12 000 20 000 25 000 30 000
–100 0,4 or
3 – – – 9 000 – –
S.W.
10 – – – – 9 000 18 000
30 – – – – – 9 000
E11
0,3 – – – 40 000 – –
L.R. 1 – – – 25 000 40 000 40 000
–200 0,4 or 3 – – – 10 000 – –
S.W.
10 – – – – 9 000 20 000
30 – – – – – 12 000
L.R. 0,3 3 000 3 600 – – – –
–6 0,4 or
1 2 200 2 400 – 3 000 – –
E31
S.W.
3 – – – 2 500 – –
–10 0,4 L.R. or S.W. 0,3 3 600 4 000 – 5 000 – –
0,3 1 900 2 000 – – – –
L.R.
–2 0,4 or 1 1 800 1 900 – 1 900 – –
S.W. 3 – – – 1 800 – –
E41
L.R. 0,3 3 500 3 800 – – – –
–3 0,4 or 1 3 000 3 300 – 3 600 – –
S.W.
3 – – – 3 000 – –
a
The second digit of the alloy class stands for the shape of the hysteresis loop:
1 = round (non-oriented);
2 = rectangular (oriented).
NOTE There is no corresponding measurement procedure in the IEC 60404-6 up to now. However, 60404-6 is
under revision, and will be amended correspondingly.

– 6 – 60404-8-6 Amend. 1 © IEC:2007
Page 27
Table 3
Replace the existing table with the following new table:
Table 3 – DC magnetic property requirements for bar, billet, rod, sheet, strip and wire,
a
thickness or diameter greater than 0,05 mm – S.R., L.R. or E.S. specimen
Minimum magnetic polarization in teslas
Alloy Magnetic Maximum coercivity
ˆ
for in amperes per metre
H
b
class grade A/m
100 200 300 500 1 000 4 000
A –240 240 – – 1,15 1,30 – 1,60
–120 120 – – 1,15 1,30 1,45 1,60
–80 80 – 1,10 1,20 1,30 1,45 1,60
–60 60 – 1,15 1,25 1,35 1,45 1,60
–20 20 1,15 1,25 1,30 1,40 1,45 1,60
–12 12 1,15 1,25 1,30 1,40 1,45 1,60
C1 –48 48 0,60 – 1,10 1,20 – 1,50
–24 24 1,20 – 1,30 1,35 – 1,50
–12 12 1,20 – 1,30 1,35 – 1,50

Measuring Maximum coercivity in
Minimum permeability
Minimum magnetic polarization in teslas
Alloy Magnetic amperes per metre for a
ˆ
point
H
b for a thickness, in
class grade ˆ
thickness, in
for in amperes per metre
H
millimetres, of
millimetres, of
A/m
0,05-1,5 >1,5 0,05-1,5 >1,5 20 50 100 500 800
–30 30 000 15 000 4 4
0,40 0,55 0,60 0,63 0,65
E11 –60 0,4 60 000 30 000 2 4
–100 100 000 50 000 1 2 0,50 0,65 0,70 0,73 0,73
–4 4 000 3 000 12 12
0,50 0,90 1,00 1,30 1,40
E31 –6 0,4 6 000 5 000 10 10
–10 10 000 7 000 6 6 0,50 0,90 1,10 1,35 1,40
E41 –3 0,8 2 500 2 500 24 24 0,20 0,45 0,70 1,00 1,10
E21
As agreed between the manufacturer and the purchaser
E32
60404-8-6 Amend. 1 © IEC:2007 – 7 –

Minimum magnetic polarization in teslas
Maximum
Alloy Magnetic Supplied Dimensions
ˆ
for in amperes per metre
H
b coercivity
class grade form mm
A/m
300 800 1 600 2 800 4 000 8 000
Bulk material, 240 1,40 1,70 1,90 2,00 2,06 2,15
–240 > 6
hot–rolled
F11 Rod, wire d ≤ 6 120 1,70 2,00 2,10 2,15 2,20 2,25
–120
Sheet, strip 0,05 ≤ t ≤2,0 120 – – – – – –
–60 Sheet, strip 0,05 ≤ t ≤2,0 60 1,80 2,10 2,20 2,23 2,25 2,25
F12 –30 S.W. 0,05 ≤ t ≤1,5 30 As agreed between the manufacturer and the purchaser
Bulk material > 6 300 – 1,20 1,30 1,35 – –
F21 –300
Sheet, strip 300 – 1,50 1,60 1,80 2,00 2,20
0,05 ≤ t ≤2,0
Bulk material 300 – – – – 1,10 1,75
> 6
F31 –300
Sheet, strip 300 – – – – 1,85 2,00
0,05 ≤ t ≤2,0
a
The properties for 0,05 mm to 2 mm thicknesses refer to sheet and strip only. For bar, billet, rod and wire with small cross-sections, magnetic
polarization shall be determined on S.R. specimens taken at an earlier stage of manufacture.
b
The second digit of the alloy class stands for the shape of the hysteresis loop:
1 = round (non-oriented);
2 = rectangular (oriented by texture or thermomagnetic treatment).

Page 29
Table 4
Replace the existing table with the following new table:
Table 4 – Maximum permeability rise factor for sheet and strip – L.R. test specimen,
a.c. measurement (50 Hz or 60 Hz)
a b
δ δ
0,4 8
Alloy class Magnetic grade
–2 –2
10 m/A 10 m/A
E41 –2 4,7 3,1
C21 –9 – 15,7
C22 –13 – 15,7
a
δ = (μ − μ ) /(μ ⋅ ΔH ) = 0,833(μ − μ ) /
...