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Expanded Alloy

Expanded Alloy

  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate
  • Expanded alloy 4J44 Plate

Expanded alloy 4J44 Plate

The execution standard of Expanded alloy 4J44 Plate is GB/T 15018-1994.
Expanded alloy 4J44 Plate has a certain linear expansion coefficient in the temperature range of -60 ℃ ~ +400 ℃, and can be matched and firmly sealed with hard glass; Expanded alloy 4J44 Plate is suitable for launch tubes, oscillation tubes, ignition tubes, transistors and Tube sealing plugs, relay shells and other electrical vacuum components.
Expanded alloy 4J44 Plate specifications: wire, ribbon, rod, plate, tube

Specifications

In stock, can be customized according to customer requirements

Form

Plate,Strip,Bar,Wire

Classification

Expanded alloy

Product Parameters

1)Chemical Composition

Grade

Ni

Co

Fe

4J29

28.5~29.5

16.8~17.8

Balance

4J44

34.2~35.2

8.50~9.50

Balance

2)Mechanical behavior

Alloy grade

Sample processing

Average linear expansion coefficient  ( a/10-6·K-1)

Condition (code)

Tensile strength(σ  b/ MPa)

20~300℃

20~400℃

20~450℃

4J29

Heat to 900±20℃ in a hydrogen atmosphere, hold for 1 hour, then heat to 1100±20℃, hold for 15 minutes, cool to below 200℃ at a speed of no more than 5℃/min and come out of the oven。

-

4.6~5.2

5.1~5.5

Soft state (R)

570

1/4 Hard state (1/4)

520~630

4J44

4.3~5.1

4.6~5.2

-

1/2 Hard state (1/2)

590~700

3/4 Hard state (3/4)

600~700

Hard state

700

Application Scenario

Expanded alloy 4J44 Platehas a certain linear expansion coefficient in the temperature range of -60 ℃ ~ +400 ℃, and can be matched and firmly sealed with hard glass.


Theexpanded alloy 4J44 Plateis suitable for electric vacuum components such as transmitter tubes, oscillation tubes, ignition tubes, transistors, tube sealing plugs, relay shells, etc.


Expanded alloy 4J44 Plateis used to make iron-nickel-cobalt alloy strips, rods, plates, and pipes that are matched and sealed with hard glass.
Suitable for electric vacuum devices such as transmitter tubes, oscillation tubes, ignition tubes, transistors, tube sealing plugs, and relay shells.
It has a certain linear expansion coefficient in the temperature range of 20℃-450℃ and can be matched and firmly sealed with hard glass.

未标题-1

Production Process

The manufacturing process of stainless steel and alloys involves multiple steps to transform raw materials into flat,rectangular sheets or plates made of stainless steel and alloys. Here are a few key steps for stainless steel and alloys:

  • Casting

    Casting

    Molten stainless steel and alloys are cast into large ingots or billets through a casting process.

  • Hot rolling

    Hot rolling

    During the hot rolling process,the thickness of the steel ingot is gradually reduced and elongated to form long strips or coils.

  • Annealing

    Annealing

    Annealing involves heating stainless steel and alloys to a specific temperature and then slowly cooling it.

  • Cold rolling

    Cold rolling

    Cold rolling is carried out through rolling mills to reduce thickness to meet customer specifications.

Our Service

Wuxi Walmay Metal Co,Ltd is a comprehensive processing group of Alloy Steel、Forged Parts Fitting、Titanium Alloy、Stainless Steel、Special Welding Wireseries, and more than 800 specifications.

Our group has been engaged in the domestic and global market for more than ten years with rich steel experience and can offer professional advice for customers inapplications with different materials.

  • Plate processing

    Machine cutting

    Sheet cutting

    plasma cutting

    Dynamic waterjet cutting

    sawing

    Plank leveling

    polishing

    laser cutting

  • Long product processing

    laser cutting

    production cutting

    Long product cutting

    Bar and structural cutting

    polishing

  • Value-added services

    Heat treatment and annealing: Wuxi Walmay Metal can heat treat certain 400 series stainless steels.

    Material Reliability Identification (PMI): Wuxi Walmay Metal can complete this testing in-house.

    Ut Testing: Ultrasonic testing (UT) uses high-frequency sound energy to inspect and measure stainless steel products.

Inquiry

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Our professional sales team answers your questions within 24 hours.

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