High Permeability Alloys with High Hardness and High Electrical Resistance

1J87, 1J88, 1J89, 1J90, 1J91

This kind of soft magnetic alloy has high hardness, high resistance, high initial permeability, insensitive to magnetic stress and good wear resistance. Make magnetic heads and chips of various tape recorders, as well as iron cores of tape recorders and high-frequency devices.

Chemical Composition, %

AlloyCPSSiMnNiMoAlNbTiFe
1J87≤0.03≤0.02≤0.02≤0.300.3-0.678.5-80.51.6-2.26.5-7.5Rest
1J88≤0.03≤0.02≤0.02≤0.30≤0.679.5-80.57.5-9.0Rest
1J89≤0.03≤0.02≤0.02≤0.300.5-1.078.5-80.53.5-4.53.0-3.61.8-2.8Rest
1J90≤0.03≤0.02≤0.02≤0.30≤0.679.0-80.51.8-2.20.4-0.64.8-7.2Rest
1J91≤0.03≤0.02≤0.02≤0.30≤0.678.5-80.50.9-1.27.7-8.4Rest

Peak Permeability

AlloyThickness, mmPeak permeability at 400Hz mH/m
I 0.8A/mI pm
1J870.20≥21040(26.3)≥40000(50)
1J900.35≥16000(20)≥28000(35)

AC Magnetic Properties, Resistivity and Microhardness

AlloyThickness, mmAc magnetic propertiesResistivity μΩ.cmMicroHardness Hv
Initial permeability μi(mH/m)Maximum permeability μmax (mH/m)Corecive force Hc/A.mSaturation magnetic induction Bs/T
1J870.02-0.04≥30000(37.5)≥100000(125)≤2.0≥0.5≥75≥190
>0.04-0.09≥35040(43.8)≥120000(150)≤1.2≥0.5≥75≥190
>0.09-0.29≥40000(50)≥200000(250)≤0.8≥0.5≥75≥190
>0.29-0.50≥35040(43.8)≥180000(225)≤1.2≥0.5≥75≥190
>0.50-1.00≥35040(43.8)≥150000(187.5)≤1.6≥0.5≥75≥190
1J880.02-0.04≥30000(37.5)≥100000(125)≤2.0≥0.55≥70≥180
>0.04-0.09≥35040(43.8)≥120000(150)≤1.6≥0.55≥70≥180
>0.09-0.29≥40000(50)≥150000(187.5)≤1.2≥0.55≥70≥180
>0.29-1.00≥30000(37.5)≥100000(125)≤2.0≥0.55≥70≥180
1J890.02-0.04≥15040(18.8)≥70000(87.5)≤2.4≥0.45≥85≥200
>0.04-0.09≥20000(25)≥90000(112.5)≤1.6≥0.45≥85≥200
>0.09-0.29≥25040(31.3)≥100000(125)≤1.2≥0.45≥85≥200
>0.29-1.00≥20000(25)≥80000(100)≤1.6≥0.45≥85≥200
1J900.02-0.04≥30000(37.5)≥100000(125)≤2.0≥0.45≥85≥250
>0.04-0.09≥35040(43.8)≥150000(187.5)≤1.6≥0.45≥85≥250
>0.09-0.29≥40000(50)≥180000(225)≤0.8≥0.45≥85≥250
>0.29-1.00≥35040(43.8)≥150000(187.5)≤1.2≥0.45≥85≥250
1J910.02-0.04≥5000(6.25)≥40000(50)≤3.2≥0.45≥80≥300
>0.04-0.09≥8000(10)≥60000(75)≤2.0≥0.45≥80≥300
>0.09-0.29≥10000(12.5)≥80000(100)≤1.6≥0.45≥80≥300
>0.29-1.00≥8000(10)≥60000(75)≤2.0≥0.45≥80≥300

Elastic Permeability

AlloyThickness, mmElastic permeability at B=0.002T μi(mH/m)
1k Hz10k Hz100k Hz500k Hz1000k Hz
Not less than
1J870.0223040(28.8)20000(25)5440((6.8)1000(1.25)700(0.875)
0.0325040(31.3)17040(21.3)4000(5)800(1)500(0.625)
0.0526000(32.5)9040(11.3)1800(2.25)400(0.5)200(0.25)
0.123040(28.8)4504(5.63)800(1)
1J880.0222000(27.5)20000(25)4504(5.63)
0.0324000(30)17040(21.3)3000(3.75)
0.0522000(27.5)9040(11.3)1504(5.88)
0.120000(25)4504(5.63)780(0.975)
1J890.0212000(15)10000(12.5)5440((6.8)1200(1.5)800(1)
0.0314000(17.5)7000(8.75)4000(5)1000(1.25)600(0.75)
0.0516000(20)4000(5)1800(2.25)500(0.625)3000(0.375)
0.113040(16.3)2000(2.5)800(1)
1J900.0223040(28.8)20000(25)6000(7.5)1200(1.5)800(1)
0.0325040(31.3)17040(21.3)4504(5.63)904(1.13)
0.0526000(32.5)15040(18.8)2000(2.5)600(0.75)
0.123040(28.8)5000(6.25)904(1.13)
1J910.023904(4.88)3504(4.38)3000(3.75)1000(1.25)700(0.875)
0.034000(5)3200(4)1504(5.88)800(1)
0.054200(5.25)3000(3.75)1000(1.25)300(0.375)
0.13704(4.63)2000(2.5)500(0.625)

Available Products and Specifications

Rod, Bar, Wire and ForgingsGB/T 14987-2013
Plate, Sheet and StripGB/T 14987-2013
Pipe and TubeGB/T 14987-2013
Welding Product
Others

Features

It has high initial permeability, high resistivity, high hardness, strength and wear resistance, and its magnetism is insensitive to stress.

Applications

Tape recorders, video recorders, film projectors and computer digital tape machines, magnetic head chips, micro-special motors, transformers, sensors, magnetic amplifiers and other high-frequency inductors core.