29 April, 2011 1

Amorphous Alloys for Transformer Cores

Metglas® Amorphous Transformer cores are manufactured from low loss Metglas® 2605SA1 and Metglas® 2605HB1M transformer core alloys. These low loss, high permeability alloys have excellent performance for single and three phase commercial, industrial and distribution transformer applications. 1. Alloys and the specification * These numbers in the above table are measured according to ASTM A 932/A 932 M - 01.

2. General Properties and Characteristics

Electromagnetic

The numbers in the above table are not guaranteed

Physical

The numbers in the above table are not guaranteed

3. Ribbon Dimensions and Lamination Factor

4. Typical Magnetic Properties In the following pages some examples of the properties on 2605SA1 and 2605HB1M transformer core alloys are shown. AC magnetic properties were measured by 25 cm Epstein test frame method. DC hysteresis curves were measured by a Single Strip Test method. The samples were 25.4 mm wide and 200 mm long. The heat treatment of the samples were performed at 370°C for 2 hours for 2605SA1 alloy and at 340 °C for 2 hours for 2605HB1M alloy in a magnetic field of 2400 A/m directed along the long axis of the ribbon to release stress and induce the magnetic anisotropy along the long axis of the ribbon. These properties are not guaranteed.

Alloy 2605SA1 2605HB1MInduction at 60 Hz and 80 A/m* (T) ≥1.35 ≥1.50 Core Loss* (W/kg) at 60 Hz and 1.3 T ≤0.17 ≤0.17

at 60 Hz and 1.4 T ≤0.20 ≤0.20 Exciting Apparent Power* at 60 Hz and 1.4 T (VA/kg) ≤1.10 ≤0.50

Alloy Saturation Induction (T)

Electrical Resistivity (μΩm)

Magnetostriction (x10-6)

Curie Temperature (°C)

2605SA1 1.56 1.3 27 395 2605HB1M 1.63 1.2 27 364

Alloy Density (g/cm3)

Crystallization Temperature

(°C)

Tensile Strength (N/mm2)

Young's Modulus

(GPa)

Vickers Hardness

Hv-50 g load

Thermal Expansion Coefficient (x10-6 /°C)

30 - 300°C 2605SA1 7.18 510 2,000 110 900 7.6

2605HB1M 7.33 489 2,100 120 900 4.3

Alloy Thickness

(µm) Standard Available Widths (mm)

Lamination Factor

(%) 2605SA1 25 ± 4 142.2 ± 1.0 170.2 ± 1.1 213.4 ± 1.4 ≥84 2605HB1M

29 April, 2011 2

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

Cor

e Lo

ss (W

/kg)

Induction (T)

60 H

z50

Hz

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

Cor

e Lo

ss (W

/kg)

Induction (T)

60 H

z50

Hz

Thes

e cu

rves

are

typi

cal

29 April, 2011 3

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

10Ex

citin

g Ap

pare

nt P

ower

(VA/

kg)

Induction (T)

50 H

z60

Hz

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

10Ex

citin

g Ap

pare

nt P

ower

(VA/

kg)

Induction (T)

50 H

z60

Hz

Thes

e cu

rves

are

typi

cal

29 April, 2011 4

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

110

100

Exci

ting

Effe

ctiv

e C

urre

nt (A

/m)

Induction (T)

50 H

z

2605

SA1

Mea

sure

men

t: 25

cm

Eps

tein

Fra

me

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

110

100

Exci

ting

Effe

ctiv

e C

urre

nt (A

/m)

Induction (T)

50 H

z

This

cur

ve is

typi

cal

29 April, 2011 5

2605

SA1

DC

Hyst

eres

isCu

rves

Sam

ple;

Stra

ight

Str

ip (2

5.4

mm

Wid

e, 2

00 m

m L

ong)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-10

010

2030

4050

6070

80M

agne

tic F

ield

(A/m

)

Induction (T)

Hm

= 8

A/m

H m=

80 A

/m

2605

SA1

DC

Hyst

eres

isCu

rves

Sam

ple;

Stra

ight

Str

ip (2

5.4

mm

Wid

e, 2

00 m

m L

ong)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-10

010

2030

4050

6070

80M

agne

tic F

ield

(A/m

)

Induction (T)

Hm

= 8

A/m

H m=

80 A

/m

Thes

e cu

rves

are

typi

cal

29 April, 2011 6

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

050

100

150

200

250

300

350

400

450

500

Tem

pera

ture

(

)

Induction (T)

2605

SA1

Mea

sure

d by

Vib

ratin

g Sa

mpl

e M

agne

tom

eter

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

050

100

150

200

250

300

350

400

450

500

Tem

pera

ture

(

)

Induction (T)

2605

SA1

Mea

sure

d by

Vib

ratin

g Sa

mpl

e M

agne

tom

eter

This

cur

ve is

typi

cal

29 April, 2011 7

2605

HB1M

Mea

sure

men

t; 25

cm E

pste

in F

ram

e

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

Cor

e lo

ss (W

/kg)

Induction (T)

60Hz

50Hz

Thes

e cu

rves

are

typi

cal

29 April, 2011 8

2605

HB1M

Mea

sure

men

t; 25

cm E

pste

in F

ram

e

0.5

0.6

0.7

0.8

0.91

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8 0.

010.

11

10Ex

citin

g A

ppar

ent P

ower

(VA

/kg)

Induction (T)

60Hz

50Hz

Thes

e cu

rves

are

typi

cal

29 April, 2011 9

2605

HB1M

Mea

sure

men

t; 25

cm E

pste

in F

ram

e

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

110

100

Exci

ting

Effe

ctiv

e C

urre

nt (A

/m)

Induction (T)

50Hz

This

cur

ve is

typi

cal

29 April, 2011 10

2605

HB1M

DC

Hys

tere

sys

Cur

ves

Sam

ple;

Str

aigh

t Str

ip (2

5.4m

m w

ide,

200

mm

long

)

0

0.2

0.4

0.6

0.81

1.2

1.4

1.6 -1

00

1020

3040

5060

7080

Mag

netic

Fie

ld (A

/m)

Induction (T)

H m =

8 A

/m

H m =

80

A/m

Thes

e cu

rves

are

typi

cal

29 April, 2011 11

2605

HB1M

Mea

sure

d by

Vib

ratin

g Sa

mpl

e M

agne

tom

eter

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

050

100

150

200

250

300

350

400

450

500

Tem

pera

ture

(°C

)

Induction (T)

This

cur

ve is

typi

cal

29 April, 2011 12

5. Typical Magnetic Properties of Transformer core Some examples of the properties on 2605SA1 and 2605HB1M transformer cores are shown. They were annealed at 350°C for 1 hour for 2605SA1 core and at 320 °C for 1 hour for 2605HB1M core. These properties are not guaranteed.

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Core Loss (W/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 73

kg

60 H

z

50 H

z

Thes

e cu

rves

are

typi

cal.

Cor

e Lo

ss o

f 260

5SA1

Tra

nsfo

rmer

Cor

e

29 April, 2011 13

0.0

1.0

2.0

3.0

4.0

5.0

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 73

kg

60 H

z 50 H

z Th

ese

curv

es a

re ty

pica

l.

Exci

ting

Pow

er o

f 260

5SA1

Tra

nsfo

rmer

Cor

e

29 April, 2011 14

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

5In

duct

ion

(T)

Core loss (W/kg)

Thes

e cu

rves

are

typi

cal.

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C w

ithou

t Soa

k)

Ove

r Lap

Joi

nt

Rib

bon

Wid

th: 1

70 m

m (6

.7")

C

ore

Wei

ght:

73 k

g

2605

SA1

Tran

sfor

mer

Cor

e f =

50

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 15

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

5In

duct

ion

(T)

Core loss (W/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C w

ithou

t Soa

k)

Ove

r Lap

Joi

nt

Rib

bon

Wid

th: 1

70 m

m (6

.7")

C

ore

Wei

ght:

73 k

gTh

ese

curv

es a

re ty

pica

l.

2605

SA1

Tran

sfor

mer

Cor

e f =

60

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 16

0.0

0.5

1.0

1.5

2.0

2.5

3.0

11.

11.

21.

31.

41.

5In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Thes

e cu

rves

are

typi

cal.

2605

SA1

Tran

sfor

mer

Cor

e f =

50

Hz

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C w

ithou

t Soa

k)

Ove

r Lap

Joi

nt

Rib

bon

Wid

th: 1

70 m

m (6

.7")

C

ore

Wei

ght:

73 k

g

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 17

0.0

0.5

1.0

1.5

2.0

2.5

3.0

11.

11.

21.

31.

41.

5In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Thes

e cu

rves

are

typi

cal.

2605

SA1

Tran

sfor

mer

Cor

e f =

60

Hz

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

350

˚C w

ithou

t Soa

k)

Ove

r Lap

Joi

nt

Rib

bon

Wid

th: 1

70 m

m (6

.7")

C

ore

Wei

ght:

73 k

g

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 18

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6 -1

00

1020

3040

5060

7080

Mag

netic

Fie

ld (A

/m)

Induction (T)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

Lon

gitu

dina

l Fie

ld A

nnea

l (35

0 ˚C

1 h

our)

O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 73

kg Th

is c

urve

is ty

pica

l.

DC

Hys

tere

sis

Cur

ve o

f 260

5SA1

Tra

nsfo

rmer

Cor

eH m

= 8

0 A/

m

29 April, 2011 19

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Core Loss (W/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

60 H

z

50 H

z

Thes

e cu

rves

are

typi

cal.

Cor

e Lo

ss o

f 260

5HB

1M T

rans

form

er C

ore

29 April, 2011 20

0.0

1.0

2.0

3.0

4.0

5.0

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

60 H

z

50 H

z Th

ese

curv

es a

re ty

pica

l.

Exci

ting

Pow

er o

f 260

5HB

1M T

rans

form

er C

ore

29 April, 2011 21

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Core loss (W/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

Thes

e cu

rves

are

typi

cal.

2605

HB1M

Tra

nsfo

rmer

Cor

e f =

50

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 22

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Core loss (W/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

Thes

e cu

rves

are

typi

cal.

2605

HB1M

Tra

nsfo

rmer

Cor

e f =

60

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 23

0.0

0.5

1.0

1.5

2.0

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

Thes

e cu

rves

are

typi

cal.

2605

HB1M

Tra

nsfo

rmer

Cor

e f =

50

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 24

0.0

0.5

1.0

1.5

2.0

11.

11.

21.

31.

41.

51.

6In

duct

ion

(T)

Exciting Apparent Power (VA/kg)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

L

ongi

tudi

nal F

ield

Ann

eal (

320

˚C 1

hou

r) O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg

Thes

e cu

rves

are

typi

cal.

2605

HB1M

Tra

nsfo

rmer

Cor

e f =

60

Hz

Ope

ratin

g Te

mpe

ratu

re

25 ˚C

75 ˚C

95 ˚C

135

˚C

29 April, 2011 25

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6 -1

00

1020

3040

5060

7080

Mag

netic

Fie

ld (A

/m)

Induction (T)

Cor

e fo

r Sin

gle-

Phas

e Tr

ansf

orm

er

Anne

alin

g C

ondi

tion:

Lon

gitu

dina

l Fie

ld A

nnea

l (32

0 ˚C

1 h

our)

O

ver L

ap J

oint

R

ibbo

n W

idth

: 170

mm

(6.7

")

Cor

e W

eigh

t: 75

kg Th

is c

urve

is ty

pica

l.

DC

Hys

tere

sis

Cur

ve o

f 260

5HB

1M T

rans

form

er C

ore

H m =

80

A/m