What is the precision alloy grade (GB/T15018-1994)?

(1)How to indicate the brand number
(1) Precision alloy grades are represented by a combination of Arabic numerals and Chinese pinyin letters.
(2) The type of precision alloy is represented by the letter “J” (the first letter of the Chinese pinyin of “jing”) and the number in front of it. Right now:
1J——Soft magnetic alloy 4J——Expansion alloy
2J——Deformed permanent magnet alloy 5J——Thermal bimetal
3J——Elastic alloy 6J——Precision resistance alloy
(3) The first and second digits after the letter “J” represent the serial numbers of different alloy grades (except thermal bimetal). The serial number starts from 01 and can be programmed to 99.
The serial number of the alloy grade should, in principle, be expressed by the median percentage content of the main elements (except iron). If the cnc-machining/aluminum 2011 alloy serial numbers are repeated, one of the alloy serial numbers can be expressed as the median value of the sum of the main element percentage content and the other alloy element percentage content, or as the upper (or lower) limit of the main element percentage content to show the difference. .
(4) For alloys with the same alloy composition and different properties due to different production processes, or alloys with the same alloy composition (including those that are basically the same), used for different purposes and with different performance requirements, when it is necessary to distinguish them, the serial number should be used They are then marked with Chinese Pinyin letters (the first letter of the Chinese Pinyin indicating the main properties or uses of the alloy) to distinguish them.
(5) Thermal bimetal: The letter “J'”, the first and second digits after it represent the integer of the nominal value of specific bending (unit is 10-6/°C); the third digit and subsequent digits represent the nominal value of resistivity ; The letters A and B after the numbers represent two thermal bimetallic grades with the same passive layer and different active layers respectively.

Has high saturation magnetic induction intensity and magnetic permeability

The cores of various transformers, relays, and electromagnetic clutches working in medium magnetic fields have high initial magnetic permeability.

Various transformers, mutual inductors, magnetic amplifiers, choke cores and magnetic shields working in weak magnetic fields

1J34, 1J511J52, 1J65, 1J67, 1J831J40

With rectangular hysteresis loop and high saturation magnetic induction intensity

Magnetic amplifiers, choke coils, rectifier coils, and computer device components that work in medium magnetic fields

1J06

It has high saturation magnetic induction intensity, low residual magnetic induction intensity and certain resistance to atmospheric corrosion.

Iron core and inductive components in solenoid valves and electromagnetic clutches

1J12

Higher saturation magnetic induction intensity and magnetic permeability

Micromotors, transformers, magnetic amplifiers and relay cores operating in medium magnetic fields. Can be used instead of 1J146 alloy

1J13

Higher saturation magnetostriction coefficient and saturation magnetic induction intensity

Magnetostrictive Transducer Element

1J16

High magnetic permeability and high resistivity

High frequency components of transformers, relay cores, magnetic shields and frequency dividers

1J30, 1J311J32, 1J33,
1J38

Within the ambient temperature range, the magnetic induction intensity changes sharply with temperature changes

Magnetic shunt compensation components in electromagnetic circuits and permanent magnet circuits

1J36, 1J17, 1J18

High saturation magnetic induction intensity, low residual magnetic induction intensity, corrosion resistance in water vapor, salt spray or hydrazine media

Solenoid valves in various control systems working under conditions affected by medium, temperature, and pressure

1J66

Magnetic permeability changes very little over a wide range of magnetic fields, temperatures and frequencies

constant inductance element

1J22

High saturation magnetic induction intensity, high Curie point and high magnetostriction coefficient

Electromagnet pole head, end-welded tube in magnetron, telephone earphone diaphragm, torque motor rotor, magnetostrictive transducer core

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

High initial magnetic permeability, high hardness, high resistivity, and the magnetism is not sensitive to stress and has good wear resistance.

Various tape drive heads and chips. As well as the cores of recorders and high-frequency devices

2J04

Excellent hysteresis characteristics under low operating magnetic field

Hysteresis motor rotor operating in low magnetic field

2J07, 2J09, 2JlO, 2J11, 2J12

Excellent hysteresis characteristics under medium and high operating magnetic fields

Hysteresis motor rotor operating in medium and high magnetic fields

2J51, 2J52

Good hysteresis characteristics at lower operating magnetic fields

Hysteresis motor rotor operating in lower magnetic fields

2J53

Good hysteresis characteristics in medium operating magnetic fields

Hysteresis motor rotor operating in medium magnetic field

2J31, 2J32, 2J33

It has high saturation magnetic induction intensity and stable magnetic properties.

Small cross-section permanent magnet components with complex shapes

2J21, 2J23, 2J25, 2J27

It has good hysteresis characteristics under medium and high operating magnetic fields.

Integral hysteresis motor rotor

2J63, 2J64, 2J65, 2J67

Magnetic energy product is low but easy to process

In situations where magnetic performance requirements are not high, it can be used to make magnetic needles and other permanent magnet components.

2J83, 2J84, 2J85

The magnetic energy product is equivalent to cast AlNiCo 5 and has good processing performance.

Permanent magnet components with complex shape and small size

3J01

After aging, high elasticity and strength can be obtained, and it is also corrosion-resistant and weakly magnetic.

Various diaphragms, diaphragms, bellows, springs and other elastic components in the instrument industry

3J53

High elasticity and strength, with low elastic modulus temperature coefficient in the range of -60~+100%

3J53P, 3J58

Has low frequency temperature coefficient in the range of -40~80℃

Oscillators in mechanical filters, tuning forks in frequency resonators, and components in resonant relays

3J63

Has a positive frequency temperature coefficient in the range of -40 to 80°C

Components such as transducer oscillators and composite oscillators in agnesium die casting mechanical equipment parts

3J53Y

Compared with 3J53, it has higher antimagnetic performance and more stable frequency temperature coefficient.

Watches, clock hairsprings

3J40

Non-magnetic, anti-vibration, wear-resistant

Instruments and instrument shaft tips

3J22

Non-magnetic, corrosion-resistant

Instrument shaft tip

3J21

Non-magnetic, corrosion-resistant, high elasticity, high strength and good fatigue resistance

Various instrument springs and other elastic components working below 400°C

3J60

It has a large magnetostrictive coefficient and a low mechanical quality factor, and the longitudinal vibration propagation speed changes little.

Transducing wires and coupling wires in mechanical filters

3J09

Non-magnetic, high elasticity, high strength, high hardness

Elastic components for clocks, timers and instruments

4J32, 4J36

Low linear thermal expansion coefficient in the range of 20-100°C

Various instruments, instrument parts, thermal bimetal passive layers, and resonant cavities that require dimensional stability

4J38

It has low linear thermal expansion coefficient in the range of 20 to 100°C and is easy to machine.

Various instruments, instrument parts, and resonant cavities that require dimensional stability

4J40

It has a low linear thermal expansion coefficient in the range of -20~300°C. High temperature low expansion alloy

In the vacuum industry, we make various klystrons, resonant cavities of microwave tubes, etc.

4J06, 4J47, 4J49

Has a linear thermal expansion coefficient similar to that of soft glass within a certain temperature range

Matching and sealing with corresponding soft glass in the electric vacuum industry

4J42, 4J45, 4J50

Has a certain linear thermal expansion coefficient within a certain temperature range

Matching sealing with soft glass or corresponding ceramics in the electric vacuum industry

4J29

Has a linear thermal expansion coefficient similar to that of hard glass within a certain temperature range

Matching sealing with hard glass in the vacuum industry

4J44

Has a certain linear thermal expansion coefficient in the range of 20 to 500°C

Matching and sealing with corresponding hard glass in the electric vacuum industry

4J28

Within a certain temperature range, it has a linear thermal expansion coefficient similar to that of soft glass. preservative

Matching and sealing with corresponding soft glass in the electric vacuum industry

4J43

Has a certain linear thermal expansion coefficient in the range of 20 to 400°C

Dume silk core

4J33, 4J34

It has a linear thermal expansion coefficient similar to that of 95% Aa203 ceramics in the range of -60~600°C.

Matching sealing with 95% A1203 and other ceramics

4J58

It has a certain linear thermal expansion coefficient in the range of 20-50°C. Have high dimensional stability

Precision linear rulers that require dimensional stability, etc.

4J78, 4J80, 4J82

Has a medium linear thermal expansion coefficient from room temperature to 600°C. Non-magnetic, corrosion-resistant, with high strength and toughness

Used as non-magnetic non-matching porcelain sealing material in gyroscopes and other electric vacuum devices

5J20110

Has high thermal sensitivity and high resistivity

5J14140

Has high resistivity and moderate heat sensitivity

5J15120

Has high resistivity and moderate heat sensitivity

Used as non-magnetic non-matching porcelain sealing material in gyroscopes and other electric vacuum devices

5J1378

Has moderate heat sensitivity and high resistivity

Thermal sensitive components in medium temperature measurement and automatic control equipment

5J1480

Has moderate heat sensitivity and high resistivity

5J1478

Higher thermal sensitivity and higher resistivity below O°C

Thermal sensitive components in low-temperature measurement and automatic control equipment

5J1578

Has higher thermal sensitivity and higher resistivity

Thermal sensitive components in medium temperature measurement and automatic control equipment

5J1017

Has low thermal sensitivity and low resistivity

5J1416

Has medium heat sensitivity, low resistivity, and high thermal conductivity

5J1070

Has low thermal sensitivity and wide linear temperature range

Thermal sensitive components in higher temperature measurement and automatic control equipment

5J0756

Has low thermal sensitivity and wide linear temperature range

Thermal sensitive components in high temperature measurement and automatic control equipment

5J1306A, 5J1306B, 5J1411A, 5J141lB, 5J1417A, 5J1417B, 5J1220A, 5J1220B, 5J1325A, 5J1325B, 5J1430A, 5J1430B, 5J1435A, 5J1435B, 5J1440A, 5 J1440B, 5J1455A, 5J1455B

All have moderate heat sensitivity and vary in resistivity

Thermal relays, circuit breakers, motor overload saturators and other thermal components

5J1075

Has low thermal sensitivity and corrosion resistance

Thermal relays, circuit breakers, motor overload saturators and other thermal components

6J10

Has low resistivity and low temperature coefficient of resistance

Various measuring instruments, meters and other resistive components

6J15, 6J20

Has higher resistivity and lower temperature coefficient of resistance

6J22, 6J23, 6J24

It is a modified nickel-chromium alloy. Has a low temperature coefficient of resistance and small thermal electromotive force on copper

Precision resistive components such as various measuring instruments and meters