Project Description

Soft Magnetic Alloys for Magnetic Head

Alloy

1J75, 1J77C, 1J79C, 1J85C, 1J87C, 1J92, 1J93, 1J94, 1J95

Specification

YB/T-086-1996

Product Forms

Tape, Sheet

Chemical Composition, %

AlloyCPSSiMnNiMoNbCuWCrFe
1J75≤0.03≤0.02≤0.02≤0.300.5-1.074-761.5-2.05.0-7.01.0-1.5Rest
1J77C≤0.03≤0.02≤0.02≤0.30≤0.776.5-78.03.5-4.53.8-5.3Rest
1J79C≤0.03≤0.02≤0.02≤0.300.7-1.278.0-81.53.7-4.5Rest
1J85C≤0.03≤0.02≤0.020.3-0.60.3-0.780.0-81.55.0-6.0Rest
1J87C≤0.03≤0.02≤0.020.15-0.300.3-0.680.0-81.51.0-2.04.0-5.5Rest
1J92≤0.03≤0.02≤0.02≤0.30≤0.680.1-81.51.0-1.53.0-4.01.0-1.5Rest
1J93≤0.03≤0.02≤0.02≤0.300.3-0.680.5-81.53.0-4.03.0-4.5Rest
1J94≤0.03≤0.02≤0.02≤0.300.3-0.679.5-81.04.5-5.00.6-1.01.5-2.50.3-0.7Rest
1J95≤0.03≤0.02≤0.022.8-3.383-841.2-1.60.4-0.6Rest

DC Magnetic Properties

AlloyPermeability at a magnetic field intensity of 0.4 A/m, μ0.4/mH˙m-1Maximum permeability μm/mH˙m-1Saturation magnetic induction Bs/TCoercive force (under saturation magnetic induction) Hc/A˙m-1
1J75≥30000(37.5)≥150000(187.5)≥0.70≤1.6
1J77C≥30000(37.5)≥100000(125)≥0.67≤2.0
1J79C≥30000(37.5)≥100000(125)≥0.75≤1.6
1J85C≥30000(37.5)≥100000(125)≥0.68≤1.6
1J87C≥35000(43.75)≥150000(187.5)≥0.64≤1.5
1J92≥35000(43.75)≥150000(187.5)≥0.70≤1.5
1J93≥35000(43.75)≥100000(125)≥0.60≤2.0
1J94≥40000(50)≥100000(125)≥0.60≤1.6
1J95≥40000(50)≥100000(125)≥0.55≤1.6

Ac Magnetic Properties

AlloyThickness, mmPermeability at different frequencies measured at the peak value of magnetic field intensity of 0.8 A/m, μm/mH˙m-1
0.3 kHz1 kHz10 kHz100 kHz
1J750.094≥30000(37.5)≥20000(25)≥6000(7.5)≥1200(1.5)
0.116≥25000(31.25)≥18000(22.5)≥5000(6.25)≥1000(1.25)
0.146≥20000(25)≥14000(17.5)≥4000(5)≥700(0.875)
0.196≥15000(18.75)≥10000(12.5)≥3000(3.75)≥500(0.625)
1J79C0.094≥30000(37.5)≥15000(18.75)≥5000(6.25)≥1200(1.5)
0.116≥20000(25)≥12000(15)≥4000(5)≥1000(1.25)
0.146≥12000(15)≥10000(12.5)≥3000(3.75)≥700(0.875)
0.196≥10000(12.5)≥8000(10)≥2500(3.125)≥500(0.625)
1J85C0.094≥30000(37.5)≥20000(25)≥7000(8.75)≥1500(1.875)
0.116≥25000(31.25)≥18000(22.5)≥6000(7.5)≥1200(1.5)
0.146≥20000(25)≥14000(17.5)≥5000(6.25)≥700(0.875)
0.196≥15000(18.75)≥10000(12.5)≥3000(3.75)≥500(0.625)
0.32≥10000(12.5)≥8000(10)≥1500(1.875)≥300(0.375)
1J87C0.094≥35000(43.75)≥25000(31.25)≥7000(8.75)≥1500(1.875)
0.116≥30000(37.5)≥20000(25)≥6000(7.5)≥1200(1.5)
0.146≥25000(31.25)≥15000(18.75)≥5000(6.25)≥800(1)
0.196≥15000(18.75)≥10000(12.5)≥3000(3.75)≥600(0.75)
1J920.094≥30000(37.5)≥25000(31.25)≥6000(7.5)≥1400(1.75)
0.116≥25000(31.25)≥20000(25)≥5500(6.875)≥1200(1.5)
0.146≥20000(25)≥15000(18.75)≥4500(5.625)≥800(1)
0.196≥15000(18.75)≥10000(12.5)≥3000(3.75)≥600(0.75)
1J930.094≥40000(50)≥25000(31.25)≥8000(10)≥1500(1.875)
0.116≥35000(43.75)≥20000(25)≥7000(8.75)≥1200(1.5)
0.146≥30000(37.5)≥15000(18.75)≥5000(6.25)≥1000(1.25)
0.196≥20000(25)≥12000(15)≥4000(5)≥600(0.75)
1J940.118≥25000(31.25)≥1400(1.75)
0.146≥15000(18.75)≥1000(1.25)
0.196≥10000(12.5)≥700(0.875)
1J950.116≥20000(25)≥1300(1.625)
0.146≥14000(17.5)≥700(0.875)
0.196≥10000(12.5)≥500(0.625)

Feature

At the frequency of 0.3-100kHz, it has high impedance permeability, good stability of magnetism to stress, temperature and time, high hardness, good wear resistance and corrosion resistance. Its machinability can meet the processing requirements of deep drawing, bending, grinding and welding. The strip has high dimensional accuracy, heavy roll and good appearance quality.

Application

Head housing, chips and isolators for magnetic recording devices in computers, magnetic card machines, video recorders, tape recorders, digital coders, radio, television and film equipment.