100 Ton Crane Hook Block for Eot Crane and Gantry Crane

Product: Crane Hook Block for Eot Crane and Gantry Crane

Lifting capacity: 100 ton

Material: DG20Mn, DG34CrMo, DG34Cr2Ni2Mo, etc

Certification: ISO, CE, GB/T 10051 series

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Overview

Features

Process and Materials

Application

Overview

A 100-ton crane hook pulley block refers to the hook used in cranes with a rated lifting capacity of 100 tons (100,000 kg). It is a core lifting device common to EOT cranes and gantry cranes. The 100-ton crane hook has a wide range of applications and is crucial in industrial settings requiring the lifting of objects weighing hundreds of tons. Examples include: casting/metallurgical cranes, bridge cranes in heavy workshops, gantry cranes in open storage yards, ports, shipyards, and large construction sites.

Based on the design type and structure of crane hooks, they can be divided into:
Single hook: The most common type. Simple structure, easy to use, suitable for various general-purpose EOT crane(bridge crane) and gantry cranes of 100 tons and below.
Double hook: More symmetrical force distribution, more efficient use of hook material. Commonly used in metallurgical cranes, large casting cranes, and other applications with heavier workloads and frequent attachment and detachment of heavy auxiliary equipment. Double hooks are also quite common in the 100-ton class.

Main Components of a 100-ton Crane Hook for EOT cranes and gantry cranes:
Crane Hook Body (Bent Section): Directly bears the load. Its inner side (throat) is the most stress-concentrated and dangerous section.
Crane Hook Neck (Hand): Connects the hook body and the crossbeam; typically cylindrical.
Threaded Section: Located at the end of the hook neck, used for fastening with the hook nut.
Anti-detachment Device Mounting Point for Bridge Cranes and Gantry Cranes: Used to install a forced safety latch to prevent accidental sling detachment.

Features

Selected High-Quality Alloy Forged Steel:

Using specially developed or sourced alloy forged steel for crane hooks (such as DG34CrMo, DG34Cr2Ni2Mo, etc.), whose chemical composition, purity (low sulfur and phosphorus), and mechanical properties surpass national standards, ensuring the hook's strength and toughness from the outset.

Core Crane Hook Forging Technology:

Large-tonnage die forging/hydraulic forging: Utilizing a 10,000-ton press for precision die forging, ensuring the metal fiber flow lines are continuously distributed according to the hook's shape, eliminating flow line cut-off defects that may occur with traditional free forging, significantly improving fatigue life and impact toughness.

Intelligent Heat Treatment:

Employing a computer-controlled continuous heat treatment production line (such as a controlled atmosphere quenching and tempering furnace) to achieve precise control of temperature, time, and cooling rate, ensuring uniform overall hook hardness, excellent metallographic structure, and minimized internal stress.

Inspection system far exceeding industry standards:

100% non-destructive testing: Not only is the hook body subjected to magnetic particle testing (MT), but high-risk sections are also subjected to ultrasonic testing (UT) to ensure that there are no internal cracks, white spots, inclusions, or other defects.

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Process and Materials

1. Crane Hook Materials

100-ton crane hooks used in bridge cranes and gantry cranes must be made of high-strength alloy forged steel.
Common grades: DG20Mn, DG34CrMo, DG34Cr2Ni2Mo, etc. ("DG" represents "hook steel"). 100-ton crane hooks require extremely high toughness (impact resistance) and strength.

2. 100-Ton Crane Hook Manufacturing Process

Core Process: Free Forging + Die Forging: Forging is performed using a large-tonnage press to refine the grain size, eliminate internal defects, and form fibrous flow lines, ensuring the metal flow direction aligns with the hook body shape, greatly improving load-bearing capacity and fatigue life.
Heat Treatment: Quenching and tempering are essential to obtain the optimal combination of strength and toughness (comprehensive mechanical properties).
Machining: Precision turning of threads and mating surfaces.
Surface Treatment: The hook body surface is typically shot-peened to eliminate microcracks and form a beneficial compressive stress layer, improving fatigue strength.

3. Safety Devices

Mandatory Safety Tongue: This is an absolutely essential device. It is a spring-loaded or counterweighted baffle that can be manually pushed open to engage the sling, and automatically closes upon release, locking the sling to prevent it from slipping out of the hook.
Crane Hook Nut and Thrust Bearing: The nut is equipped with an anti-loosening device. A large thrust self-aligning roller bearing is installed below it, allowing the 100-ton hook to rotate easily and smoothly under load, preventing wire rope kinking.

Application

100-ton hooks are typically mounted on the following types of cranes: Foundry/Metallurgical Cranes: Used in steel mills, specifically designed for lifting ladles of molten steel; representing the most extreme application environment for 100-ton hooks. Bridge Cranes: The mainstay in heavy-duty workshops, such as heavy machinery assembly workshops and power generation equipment workshops. Gantry Cranes: Used in open-air storage yards, ports, shipyards, and large construction sites. Portal Cranes: Used in ports and shipyards for loading and unloading heavy equipment and shipbuilding. Crawler Cranes: Used for lifting on large construction sites; the hook serves as a replaceable lifting device.