Grade

Remanence (Residual Flux Density)

Coercive Force - Intrinsic Coercive Force

Br

Hcb

Hcj

KGs

T

KOe

KA/m

KOe

KA/m

Nom

Min

Nom

Min

Nom

Min

Nom

Min

Min

Min

N40

12.7

12.5

1.26

1.25

11.6

11.3

947

923

12

955

Grade

Maximum Energy Product

Temp.Coef.

Relative Recoil Permeability

Max Work Temperature

(BH)max

αBr

αHcj

μ rec

MGOe

KJ/m3

(20°C)

(20°C)

°C

Nom

Min

Nom

Min

(%/°C)

(%/°C)

L/D≥0.7

N40

40

38

318

302

-0.11

-0.6

1.05

80

Chararcteristic

Symbol

Unit

Data

Density

D

G/cm3

7.5

Vickers Hardness

Hv

D.P.N

570

Compression Strength

C.S

N/mm2

780

Thermal Expansion Coefficient

// 10^-6/K

3.4

 |  10^-6/K

-4.8

Electric Resistance

R

μΩ.cm

150

Coating
Performance

Coating Thickness
(μm)

Corrosion-Resistant
in Salt Fog (Hr)

Coating Porosity

Ni-Cu-Ni

15-20

>48

<0.1

(Continued from Table Above)

Magnetic Flux Loss

Color

PCT

<0.1

silver

120°C 2atm 100%RH 12Hr