1J30, 1J31, 1J32, 1J33, 1J38

Thermo-magnetic Compensation Alloys

Alloy

Specification

GB/T15005-94

Product Forms

Sheet, Strip, Plate, Round Bar, Flat Bar, Forgings, Hexagon, Wire

Chemical Composition,%

Alloy	C	P	S	Si	Mn	Ni	Cr	Al	Fe
1J30	≤0.04	≤0.02	≤0.02	≤0.30	≤0.40	29.5-30.5	–	–	Rest
1J31	≤0.04	≤0.02	≤0.02	≤0.30	≤0.40	30.5-31.5	–	–	Rest
1J32	≤0.04	≤0.02	≤0.02	≤0.30	≤0.40	31.5-32.5	–	–	Rest
1J33	≤0.05	≤0.02	≤0.02	0.30-0.60	0.30-0.60	32.8-33.8	–	1.00-2.00	Rest
1J38	≤0.05	≤0.02	≤0.02	0.15-0.30	0.30-0.60	37.5-38.5	12.5-13.5	–	Rest

Magnetic Properties

Alloy	Magnetic induction under different temperature at magnetic field intensities 8000A/m B/T					Difference in magnetic induction
	-20℃	20℃	40℃	60℃	80℃	B-20℃~	B20℃~	B20℃~
	-20℃	20℃	40℃	60℃	80℃	B20℃	B40℃	B80℃
1J30	0.40-0.60	0.20-0.45	–	0.02-0.13	–	–	–	–
1J31	0.60-0.85	0.40-0.65	–	0.15-0.45	–	–	–	–
1J32	0.80-1.10	0.60-0.95	–	0.40-0.75	–	–	–	–
1J33	–	0.40-0.70	–	–	0.10-0.40	–	–	0.22-0.42
1J38	0.25-0.42	0.05-0.24	0.015-0.12	–	–	0.16-0.24	0.035-0.15	–

Feature

Thermo-magnetic compensation alloys are provided with low curie temperature between 25~200℃. Their outstanding characteristics are those magnetic induction decreases dramatically with the increase of temperature under curie temperature, and the magnetic induction is almost linear with temperature.

Application

Thermo-magnetic compensation components or thermal sensor used in traveling wave tube, magnetron, voltage regulator, gasoline gauge, watt-hour meter and speed milometer, etcs.