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Low Temperature Ductility Aluminum Wire

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Product Description

Aluminum filler metals engineered and tested to maintain exceptional ductility and fracture toughness at cryogenic temperatures, specifically down to −196∘C (Liquid Nitrogen) and below. This is achieved by utilizing Al-Mg alloys (e.g., ER5183, ER5087) which inherently lack a ductile-to-brittle transition point, unlike most carbon steels. Our products are guaranteed to meet the stringent Charpy V-Notch impact test requirements (typically >27J at −196∘C) mandated by global pressure vessel and transportation codes (ASME, DNV GL).

DB Certification CE Certification ABS Certification DNV Certification CCS Certification

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20+ Years Experience

Over two decades of aluminum alloy wire production expertise

International Certifications

DB, CE, ABS, DNV, CCS and other authoritative certifications

200MT Monthly Capacity

Large-scale production with consistent quality

Global Export

Exporting to over 30 countries worldwide

Introduction

In the storage and transport of liquefied gases (such as LNG, LOX, and LH2), the risk of catastrophic brittle fracture due to extreme cold is the central design concern. We specialize in supplying the high-toughness, low-temperature aluminum consumables that guarantee structural survival in this environment. Our process focuses on raw material purity and specific alloy additions that refine the grain structure, ensuring the weld metal retains the necessary energy absorption capacity to prevent crack propagation under thermal shock and pressure cycling.

Specification

Alloy FocusER5183 (Primary), ER5087 (Optimized toughness)
Key PropertyHigh Charpy V-Notch (CVN) Impact Energy at Low Temperature
Test Temperature RangeDown to −196∘C (or lower per customer request)
Weld Deposit StructureAl-Mg solid solution (FCC lattice) maintains high ductility when cold
Required ComplianceASME Sec VIII, DNV GL, IACS Polar Codes

Applications and Solutions

  • LNG (Liquefied Natural Gas) Carriers: Welding large internal membrane and moss-type storage tanks (service temperature −162∘C).

  • Cryogenic Storage Tanks: Land-based vessels for storing liquid oxygen (LOX) and liquid nitrogen (LIN) in industrial and medical applications.

  • Space Vehicle Fuel Tanks: Fabrication of aluminum-lithium and 2219 tanks for liquid hydrogen and oxygen propellant systems (lowest temperature service).

  • Air Separation Plants: Welding large aluminum heat exchangers and cold box piping that operate constantly at sub-zero temperatures.

FAQ

  • Q: Why is Charpy V-Notch testing so important for cryogenic filler metals?A: CVN testing measures the energy absorption capacity of the material. A high CVN value at the service temperature proves the material can resist crack propagation and brittle failure under a sudden impact or stress event.
  • Q: Can I use high-strength heat-treatable fillers for cryogenic service?A: Generally, no. Heat-treatable alloys like 6061 and their fillers often rely on precipitates (Mg2​Si) which can lose effectiveness or even become detrimental at extremely low temperatures. Al-Mg alloys (5XXX) are preferred for their stability.
  • Q: Does the welding process itself affect low-temperature toughness?A: Yes. Excessive heat input or poor welding technique that results in porosity, micro-fissuring, or large, coarse grains can severely reduce the weld's low-temperature toughness, regardless of the alloy used.

Advantages and Core Features

  • Brittle Fracture Immunity: The inherent properties of the Al-Mg crystal structure ensure no ductile-to-brittle transition occurs, maintaining high toughness even near absolute zero.

  • Certified Impact Resistance: Guaranteed Charpy V-Notch values validated by third-party laboratories, providing auditable proof of performance.

  • High As-Welded Strength: Provides the necessary mechanical strength at room temperature to handle assembly stress before cryogenic loading.

  • Minimal Contamination Risk: Manufactured with ultra-low moisture and oxide levels to ensure X-ray quality welds free of stress-inducing porosity.

Material Selection Guide

For most cryogenic aluminum applications (LNG, LIN), ER5183 is the standard due to its excellent combination of strength and certified low-temperature toughness. For applications demanding even higher fracture resistance (e.g., aerospace), the optimized ER5087 may be specified. ER4043 must be avoided due to the severe loss of toughness at cryogenic temperatures.

About Us

Coming From China, Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is China Low Temperature Ductility Aluminum Wire Manufacturers and Wholesale Low Temperature Ductility Aluminum 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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