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Cryogenic Service Aluminum Welding Wire

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Intro

Specialized aluminum filler metals (primarily 5XXX series) certified for use in extremely low-temperature applications, such as LNG/LPG storage and aerospace cryogenic tanks.

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Introduction

Welding aluminum for cryogenic service (temperatures down to −196∘C or lower) requires filler metals that maintain superior fracture toughness and impact strength at extremely cold temperatures. Our cryogenic wires, typically ER5183 or ER5356, are produced with meticulously controlled chemistry to prevent the ductile-to-brittle transition common in other metals. These materials ensure the structural integrity of LNG (Liquefied Natural Gas) and LPG (Liquefied Petroleum Gas) tanks, which are safety-critical assets.

Specification

Key PropertyHigh Charpy V-notch impact strength at cryogenic temperatures
Material FocusER5183, ER5356 (often mandatory for LNG)
Temperature RangeCertified down to −196∘C (liquid nitrogen)
ComplianceDNV GL, ABS, and applicable API standards required
Purity ControlMinimization of Si and Fe to maintain low-temperature toughness

Applications

  • Fabrication of LNG storage tanks, pipelines, and transfer systems (down to −162∘C).

  • Welding pressure hulls and inner tanks for rocket and space vehicle fuel systems (e.g., liquid hydrogen).

  • Construction of specialized laboratory equipment and cold boxes.

  • Repair and maintenance of refrigerated gas transport vessels (LPG/LNG carriers).

FAQ

  • Q: Why are 5XXX series alloys preferred for cryogenic aluminum welding?
  • A: Unlike many metals, aluminum (especially the Al-Mg 5XXX series) does not exhibit a sharp ductile-to-brittle transition as the temperature drops, maintaining high strength and toughness even at liquid nitrogen temperatures.
  • Q: What special testing is required for cryogenic welding wire?
  • A: The most critical test is the Charpy V-notch impact test, performed at the minimum design temperature (e.g., −162∘C for LNG), to ensure the material retains sufficient toughness and ductility.

Advantages

  • Guaranteed Toughness: The weld deposit maintains high resistance to brittle fracture and crack propagation at operational cryogenic temperatures.

  • Safety Critical: Certification (e.g., DNV GL) provides objective assurance of fitness-for-service in high-risk, pressure-containing applications.

  • Weld Integrity: High cleanliness ensures near-zero porosity, which is vital as defects can be initiation points for brittle fracture.

  • Excellent Weldability: The specific alloys are easy to handle, despite the high-specification requirement, maximizing productivity.

Payment and Shipping

  • Testing: Provision of certified Charpy impact test results performed at the specified low temperatures.

  • Logistics: Dedicated service to shipyards and heavy fabrication yards specializing in LNG tank construction.

  • Packaging: Enhanced moisture-proof packaging to prevent hydrogen inclusion, which severely degrades cryogenic performance.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Cryogenic Service Aluminum Welding Wire Manufacturers and Wholesale Cryogenic Service Aluminum Welding Wire OEM/ODM Suppliers. We are located in the industrial zone of Puyang Town, Xiaoshan District, Hangzhou, Zhejiang Province. It is a high-technology enterprise specializing in the research, development and manufacturing of high-performance. The company has more than 20 years of aluminum alloy wire production experience, with international advanced manufacturing equipment, complete testing equipment,stable production process and strict quality control system.
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