Cryogenic Welding Materials
Cutting-Edge Production and Analytical Facilities
University-Industry Partnership
One-on-One After-Sales Service
ISO 9001, ISO 45001, ISO 14001
The ultra-low temperature mechanical properties of deposited metal are stable, with good formability and slag.
High manganese austenitic steel plates can be used for welding low-temperature pressure vessels such as liquefied.
Compliant with standards:T/SSEA 0132 EHMn16(15).
A107 is an alkaline coated stainless steel electrode with good mechanical properties and intergranular corrosion resistance in the weld metal. It uses DC reverse polarity and is suitable for all-position welding.
It is used for welding 06Cr19Ni10-type stainless steel structures and can also be used for welding steels with poor weldability, such as high chromium steels, as well as for surfacing stainless steel layers.
Compliant with standards: GB/T983 E308-15, AWS A5.4 E308-15, ISO3581-B-ES308-15.
A402 is a rutile coated Cr26Ni21 pure austenitic stainless steel electrode. The weld metal exhibits excellent oxidation resistance under high temperature working conditions of 900℃-1100℃. It is suitable for both AC and DC currents and has good welding process performance.
It is used for welding the same type of heat-resistant stainless steel under high temperature conditions. It is also used for welding chromium steels with high hardenability (such as Cr5Mo, Cr9Mo, Cr13, Cr28, etc.) and dissimilar steel welding.
Compliant with standards: GB/T 983 E310-16 ,AWS A5.4 E310-16 ,ISO 3581-B-ES310-16.
Ni307-1 is a low hydrogen sodium type coated Ni70Cr15 heat-resistant alloy electrode. Due to the presence of Nb in the weld, the weld metal has good plasticity and crack resistance. It uses DC reverse polarity and can be welded in all positions.
It is used for welding nickel-chromium-iron alloys (UNS N06600, UNS N06601) and for welding nickel-chromium-iron composite alloys as well as for surfacing steel. It has good dissimilar metal welding performance and can also be used at a working temperature of 980℃, but above 820℃, oxidation resistance and strength decrease.
Compliant with standards: GB/T 13814 ENi6062, AWS A5.11 ENiCrFe-1, ISO 14172-E Ni 6062.
Ni327 is a low hydrogen sodium type coated Ni70Cr15 heat-resistant alloy electrode. Due to the presence of a certain amount of molybdenum, niobium, and other alloying elements in the weld, the weld metal has good crack resistance. It uses DC reverse polarity.
It is used for welding nickel-iron-chromium alloys (UNS N08800) and nickel-chromium-iron alloys (UNS N06600), especially suitable for dissimilar metal welding, transition layer welding, and surfacing. It can also be used at a working temperature of 980℃, but above 820℃, oxidation resistance and strength decrease.
Compliant with standards: GB/T 13814 ENi6133, AWS A5.11 ENiCrFe-2, ISO 14172-E Ni 6133.
Ni307-3 is a low hydrogen sodium type coated Ni70Cr15 heat-resistant alloy electrode. Due to the presence of a certain amount of manganese and niobium alloying elements in the weld, the weld metal has good crack resistance. It uses DC reverse polarity.
It is used for welding nickel-chromium-iron alloys (UNS N06600), nickel-chromium-iron composite alloy welding, and steel surfacing. It can also be used for welding steel to nickel alloys, with a working temperature generally not exceeding 480℃, showing good crack resistance. It is suitable for nuclear reactor pressure vessels and chemical tank welding.
Compliant with standards: GB/T 13814 ENi6182, AWS A5.11 ENiCrFe-3, ISO 14172-E Ni 6182.
ER50-6 is suitable for construction machinery, automotive, steel structures, pipelines, containers, and arc welding robots.
Compliant with standards: GB/T 8110:ER50-6, AWS A5.18:ER70S-6, JIS Z3312:YGW12.
ER50-G is suitable for single-pass and multiple-pass welding, capable of welding thin sheets, high-speed welding, and general structure welding.
Compliant with standards: GB/T 8110:ER50-G, AWS A5.18:ER70S-G, JIS Z3312:YGW15.
ER50-3 is suitable for construction machinery, automotive, steel structures, pipelines, containers, boilers, pressure vessels, and arc welding robots.
Compliant with standards: GB/T 8110:ER50-3, AWS A5.18:ER70S-3, JIS Z3312:YGW16.
A second level professor and doctoral supervisor at Wuhan University of Science and Technology, has developed a series of welding materials that can be applied to LNG high manganese austenitic low-temperature steel (-196 ℃). She has presided over national natural science foundation projects and multiple enterprise technology cooperation projects, published more than 60 academic papers, and was included in more than 30 SCI and EI journals. She has also been granted more than 10 invention patents.
The company boasts a team of R&D and application professionals with extensive technical experience. We continuously intensify our R&D efforts, adjust product structures, and enrich product diversification to provide high-quality products and comprehensive solutions to customers both domestically and internationally.
Bocast Welding Technology (Jiangsu) Co., Ltd. is located in the economically developed Yangtze River Delta region. We are a comprehensive enterprise specializing in the research and development, production, and sales of various welding materials. We are the research and development transformation base of welding materials of Wuhan University of Science and Technology. The main products include: special stainless steel welding rods, special low-temperature steel welding rods, special nickel and nickel based welding rods; Special welding wires and fluxes, etc. The high manganese austenitic low temperature steel welding rod has filled the gap in the industrial development of key materials in China, and is used in LNG storage tanks, pressure vessels ,etc.
Bocast Welding Technology (Jiangsu) Co., Ltd. is one of the major domestic manufacturers of special welding materials. The company operates basic special welding materials and also has the leading domestic ultra-low temperature high manganese austenitic stainless steel and nickel-based welding materials, which are widely used in LNG natural gas storage tanks, pressure vessels, offshore platforms, petrochemicals, military industry, nuclear power and other industries.
August 6,
2024From the welding process to compare, acidic electrode arc soft, spatter small, slag mobility and coverage are good, therefore, the weld appearance is beautiful, weld wave is fine, forming smooth: alkaline electrode arc is not stable enough, slag coverage is poor, the weld shape of the raised, and weld appearance of the ripples of roughness, but in the upward vertical welding and elevation welding is easy to operate.
Acidic welding rod contains more acidic oxides in the flux skin, oxidation is stronger, so in the welding process to make the alloying elements burn more, at the same time, due to the weld metal in the hydrogen and oxygen content is more, and thus the molten metal plasticity, toughness is lower. Typical acidic welding rods are E6013, E7016, E8016, E9016 and so on.
The flux skin of alkaline welding rod contains a large amount of alkaline oxides, and there are more iron alloys as deoxidising and alloying agents, so the flux skin has sufficient deoxidising ability. Furthermore, alkaline electrodes mainly rely on the decomposition of carbon dioxide from carbonates such as marble as a protective gas, compared with acidic electrodes, the partial pressure of hydrogen in the arc column atmosphere is lower, and fluorite in the calcium fluoride at high temperatures and hydrogen combined with hydrogen to form hydrogen fluoride (HF), which reduces the amount of hydrogen in the weld, alkaline electrodes are also known as low-hydrogen type electrodes. When welding with alkaline electrodes, the weld metal has higher plasticity and impact toughness due to the lower oxygen and hydrogen content and fewer non-metallic inclusions. Typical alkaline electrodes are E7015, E8015, E9015 and so on.
As the national standard GB/T 3965-2012 "Method for the determination of diffusible hydrogen in molten metal", AWS A4.3-93 (R2006) "Standard Method for the Determination of Diffusible Hydrogen Content in Electric Arc Weld Seam Metal of Maraging, Bainite and Ferrite Steels", ISO 3690:2018 "Welding and Related Processes -Determination of Hydrogen Content in Electric Arc Welding Weld Metal‖, and JIS Z 3118:2007 -Method for Measuring Diffusible Hydrogen Content in Steel Welds‖ [1-3] require that the diffusible hydrogen content of alkaline electrodes is ≤15 ml, while that of acidic ones can be up to 15 ml or more per 100 g of the molten metal when determined in the laboratory by the mercury method or gas chromatography method.
Need Welding bars?
Professional welding materials create excellent quality
No.69 Haiyang West Road, Dongtai City,
Jiangsu Province
+86 18962025048
+86 18964705469
+86 0515-89518188
Get in touch
Your information is safe. We'll only use it to respond to you directly. No marketing emails and never sharing your data.
