High-strength steel plates for the booms and outriggers of construction machinery cranes.
WEL-TEN Series (Nippon Steel Brand)
Considering the thinning and lightweighting of crane structural members with high strength and toughness.
Cranes are required to minimize the weight of components such as booms and outriggers while ensuring lifting capacity. While increasing the thickness of materials can make it easier to secure strength, the increase in overall weight can affect workability and transportability. We propose Nippon Steel's welded structural high-strength steel plate "WEL-TEN" for structural components that consider both strength and weight reduction. WEL-TEN is a high-strength steel plate that possesses high tensile strength and notch toughness, suitable for use in welded structures. By reviewing the plate thickness within the range that meets the required strength, it may lead to a reduction in the weight of structural components. Nippon Steel's technical documentation also indicates that high-strength steel is required for crane booms and outriggers. Kumagai Special Steel can accommodate everything from material and thickness considerations to cutting, bending, drilling, and welding fabrication.
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basic information
- While ensuring the necessary strength, I want to reduce the weight of the boom and the vehicle body. - I would like to discuss bending, cutting, and welding of high-strength materials all at once. - I want to select a strength class that matches the load conditions and usage environment. We will propose steel types after confirming design strength, plate thickness, toughness, welding conditions, and bending radius. 1. Main specifications and characteristics - Steel type classification: High-strength steel plate (for welded structures) - Representative grades: WEL-TEN540/590/780 - Tensile strength: 540 to 780 N/mm² class - Yield point: High and resistant to plastic deformation - Plate thickness range: Capable of handling from thin to thick plates 2. Features of processing and construction - Excellent weldability, capable of controlling preheating conditions - Compatible with gas, laser, and plasma cutting - Capable of bending and hole processing - Usable under processing conditions similar to ordinary steel 3. Performance highlights - Reduction in plate thickness and weight due to high strength - Excellent toughness, making it resistant to cracking - High durability and superior structural reliability 4. Specifications for Kumagai Special Steel cutting processing - Laser cutting is possible for WEL-TEN590 plates up to 40 mm thick - Dimensional tolerance is ±1.0 mm (relaxation may be requested depending on product shape) - Accurate cutting contributes to reducing subsequent processing man-hours.
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Delivery Time
P3
※Kumagai Special Steel has the largest inventory of WEL-TEN steel and is set up for immediate delivery, including cutting and processing, so it usually takes about a week depending on the lot. Additionally, for special specifications or large lots, it may take longer. Please contact us by email or phone for inquiries!
Applications/Examples of results
WEL-TEN steel is a high-tensile steel plate that combines high strength and weldability, and it has a proven track record across a wide range of industrial fields. It is valued for its ability to achieve weight reduction while ensuring structural safety. 1. Main Applications and Practical Examples - Construction Machinery: Boom, Arm, Frame Components - Industrial Machinery: Framework, Support Structures, Enclosures - Architecture and Civil Engineering: Steel Frames, Bridge Components, Seismic Reinforcement Materials - Energy-related: Tanks, Support Structures - Transportation Equipment: Special Vehicles, Trailer Structural Components 2. Evaluation Points in Practical Use - Weight reduction and improved fuel efficiency through thickness reduction - Increased longevity and reduced maintenance due to high strength - Suitable for welded structures, capable of mass production and large-scale structures 3. Expected Future Market Fields - Decarbonization-related products (CO₂ reduction through weight reduction) - Renewable energy facilities (frameworks and support structures) - Structural materials for disaster prevention and infrastructure renewal - BtoC products requiring high durability and long lifespan WEL-TEN steel is expected to see further adoption in fields where both environmental impact reduction and structural reliability are required.
Line up（3）
| Model number | overview |
|---|---|
| WEL-TEN540RE, WEL-TEN540 (55 kg steel, equivalent to SM520) | WEL-TEN540 is a high-tensile steel plate made by Nippon Steel, with a tensile strength of 540 N/mm², allowing for lightweight structures and high safety. Compared to JIS SS400, it has significantly higher strength, enabling thickness reduction and improved load-bearing capacity. Additionally, it is positioned in a strength range equal to or greater than SM520, while also offering excellent weldability and workability, making it suitable for a wide range of applications such as bridges, buildings, and industrial machinery. |
| WEL-TEN590RE, WEL-TEN590 (60 kg steel, equivalent to SM570) | WEL-TEN590 is a high-tensile steel plate made by Nippon Steel, featuring a high strength of 590 N/mm², which enables further lightweight construction and high reliability of structural components. Compared to JIS SS400, the strength difference is significant, contributing to the thinning of components and increased design flexibility. Additionally, it is positioned in a strength range that exceeds SM520, while also considering weldability and workability, making it widely used in fields that require high strength, such as construction, bridges, and construction machinery. |
| WEL-TEN780 (an ultra-high strength steel with toughness, weldability, and workability, which is difficult to find equivalent products within JIS standards, weighing 80 kilograms) | WEL-TEN780 is a high-tensile steel plate made by Nippon Steel, featuring an extremely high tensile strength of 780 N/mm², which enables significant weight reduction and enhanced durability of structural components. Compared to JIS SS400 and SM520, it offers overwhelmingly high strength, contributing to a reduction in the number of components and an extended lifespan. It is compatible with advanced welding and processing technologies and is used in fields that require exceptionally high strength, such as construction machinery, cranes, and industrial machinery. |
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Company information
Since our establishment in 1913, we have been a specialized trading company of special steel for nearly a century, listening to the needs of many customers and building an ideal relationship between customers and steel manufacturers as a conductor of steel distribution. As a trading company with various processing equipment, including cutting machines and laser cutting machines, we also contribute to reducing our customers' capital investment. Please feel free to contact us if you have any requests.
