Non-Oriented Electrical Steel Fully Processed
(FP) ASTM A677

Non-Oriented Electrical Steel Fully Processed (FP) ASTM A677
Former AISI Type ASTM Type Core Loss by Thickness Watts/lb 15 Kilogausses 60HZ Typical Electrical Resistivity Microhm-CM Some Characteristics Typical Applications
Thick Max w/lb
M-15 36F145
-
.0140
.0185
1.45
1.60
45-55
45-55
Lowest core loss of conventional
grades. Excellent permeability
at low inductions.
Small power transformers
& rotating machines
of high efficiency.
M-19 36F155
47F165
64F200
.0140
.0185
.0250
1.55
1.65
2.00
45-55
45-55
45-55
Low core loss, good
permeability at low and
intermediate inductions.
High-reactance cores,
generators, stators of highefficiency
rotating equipment.
M-22 36F165
47F180
64F210
.0140
.0185
.0250
1.65
1.80
2.10

45-55
45-55
45-55
Low core loss, good
permeability at low and
intermediate inductions.
High-reactance cores,
generators, stators of highefficiency
rotating equipment.
M-27 36F175
47F190
64F225
.0140
.0185
.0250
1.75
1.90
2.25

45-55
45-55
45-55
Low core loss, good
permeability at low and
intermediate inductions.
High-reactance cores,
generators, stators of highefficiency
rotating equipment
and relays.
M-36 36F185
47F200
64F235
.0140
.0185
.0250
1.85
2.00
2.35
40-50
40-50
40-50
Good core loss, good
permeability at all inductions
and low exciting current, good stamping properties.
Small generators, highefficiency,
continuous
duty rotating A-C and D-C
machines and transformers.
M-43 36F195
47F210
64F250
.0140
.0185
.0250
1.95
2.10
2.50
35-45
35-45
35-45
Good core loss, good
permeability at all inductions
and low exciting current, good
stamping properties.
Small generators, highefficiency,
continuous
duty rotating A-C and D-C machines and transformers.
M-45 36F205
47F240
64F275
.0140
.0185
.0250
2.05
2.40
2.75

35-45
35-45
20-30
Good stamping properties.
Good permeability at
high flux densities.
Small motors, generators,
ballasts, and relays.
M-47 47F280
64F320
.0185
.0250
2.80
3.20
20-30
20-25
Good stamping properties.
Good permeability at
high flux densities.
Small motors, generators,
ballasts, and relays.

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