High-Power 70 kW Industrial Induction Heater for Metal Heating, Brazing, and Heat Treatment

The Across International IH70AB Dual-Station Induction Heater is a high-power 70 kW mid-frequency induction heating system engineered for rapid and energy-efficient heating of metals in industrial workshops, laboratories, and manufacturing facilities.

Operating within a 30–80 kHz frequency range, the IH70AB delivers precise and consistent heating for demanding applications such as diamond tool brazing, copper soldering, automotive heat-treating, metal cutting, and annealing of stainless steel components.

This model features a dual-station configuration, allowing the heating coil assembly and controller to be separated by up to 7 feet, improving safety and flexibility during operation. Its high power capacity, digital control system, and efficient cooling design make the IH70AB suitable for heavy-duty industrial heating applications.

⚠ Note: This model operates on 460–480 V three-phase power (380 V version available upon request).

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Key Features

70 kW High-Power Induction Heating

Provides up to 70 kW oscillating power for rapid heating of conductive metals.

Mid-Frequency Heating Technology

Operates within 30–80 kHz, making it ideal for heating small parts and precision metal components.

Dual-Station System

Connection cables allow the heater and controller to be separated by up to 7 feet, enabling safer operation in high-temperature or industrial environments.

Digital Monitoring and Control

Integrated digital displays allow operators to monitor:

• Output power

• Frequency

• Heating current

• Heating cycle timing

Remote Foot Switch Operation

A 7-foot remote foot switch enables hands-free activation of heating cycles for improved safety.

Automatic and Manual Modes

Supports both automatic heating cycles and manual operation, providing flexibility for various heating applications.

Portable Industrial Design

Compact units with durable construction allow easier installation and movement within workshops and laboratories.

Custom Induction Coil Options

Induction coils can be custom-designed depending on application requirements including:

• Coil diameter

• Number of turns

• Copper tubing size

• Coil length

Across International provides custom coil manufacturing and sample testing at their New Jersey facility.

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Typical Applications

The IH70AB induction heater is commonly used for:

• Diamond tool brazing

• Copper pipe soldering

• Automotive component heat treatment

• Annealing stainless steel containers

• Industrial metal heating

• Metal forming and cutting

• Precious metal melting preparation

• Laboratory materials testing

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Safety Features

Overvoltage Protection

The system automatically shuts down if input voltage exceeds 245 V, activating an alarm and warning indicator.

Overheat Protection

If the IGBT heat sink temperature exceeds 55 °C, the machine shuts down until safe operating temperature is restored.

Overcurrent and Malfunction Protection

Automatic shutdown occurs if:

• Internal components overheat

• Signal interference is detected

• Workpiece causes coil short circuit

• Induction coils touch each other

• Input voltage is too low

• System malfunction occurs

Low Water Pressure Protection

The heater shuts down automatically if cooling water pressure drops below 29 PSI (0.2 MPa).

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Important Operating Guidelines

⚠ Always wear protective gear and safety goggles when operating the machine.

Additional guidelines include:

• Crucibles must remain covered during operation

• Avoid prolonged no-load operation

• Cooling water must be clean and below 45 °C

• Machine must be properly grounded

• Do not use single-turn coils smaller than 4 inches diameter

• Thread tape must not be used during induction coil installation

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Technical Specifications

Model

IH70AB

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Electrical Requirements

Power supply
460 VAC, 50/60 Hz, three-phase

Maximum input current
88 A

Recommended circuit breaker
110 A (3-phase)

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Heating Performance

Output frequency
30–80 kHz

Maximum oscillating/input power
70 kW

Duty cycle
100 %

Heating timer
1–99 seconds

Dwell timer
1–99 seconds

Cooling timer
1–99 seconds

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Cooling System

Cooling method
Water cooling with rear fan air cooling

Minimum water pressure
≥ 0.2 MPa (29 PSI)

Recommended pump capacity
> 1/4 HP and > 240 GPH

Water flow rate
2.6 gallons per minute (10 L/min)

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Dimensions & Weight

Controller weight

• Unit: 155 lbs

• Shipping: 190 lbs

Heater weight

• Unit: 150 lbs

• Shipping: 185 lbs

Controller dimensions
30 × 15 × 35 inches

Heater dimensions
32 × 14 × 18 inches

Connection cable length
7 feet

Foot switch cable length
7 feet

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Included Components

• IH70AB Induction Heater – 2 pcs

• Connection Cable (7 ft) – 1 set

• Remote Foot Switch (7 ft) – 1 pc

• Stainless Steel Hose Clamp – 1 set

• Fuse – 1 set

• Operation Manual – 1 pc

Optional custom copper tubing induction coils available upon request.

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Warranty

Manufacturer Warranty Included