Product Overview
AWS E8015-C1 low-temperature steel welding electrode is a high-performance welding material independently developed by Hangzhou Lin'an Dayang Welding Material Co., Ltd. (established in 1995), specially designed for low-alloy steel structure welding in low-temperature environments. This product complies with AWS A5.5 standard, corresponding to the E5515-C1 model in GB/T 5118 standard, with excellent low-temperature toughness and welding process performance, suitable for critical structural welding with working temperatures as low as -70°C.
As the technical crystallization of the company's 25 years of industry experience, this welding electrode is produced using the advanced process of vacuum induction melting + electroslag remelting, with an annual production capacity of 2,000 tons. The product quality is stable and reliable, and has been widely used in the manufacture of low-temperature equipment in the fields of petrochemicals, coal chemical industry, natural gas processing, and pharmaceuticals.
Product Features and Advantages
Excellent low-temperature toughness
• Excellent low-temperature impact performance: At -70℃, the impact energy can reach 50-80J, which is much higher than the standard requirement of 27J, ensuring that the welded joints still maintain good toughness and brittle fracture resistance under extreme low temperature conditions
• Nickel alloy strengthening: The deposited metal contains 2.0-2.75% nickel, which significantly improves the low-temperature toughness. Every 1% increase in nickel content can reduce the brittle transition temperature by about 20℃
Excellent welding process performance
• Low spatter characteristics: small spatter during welding, beautiful weld formation, and reduced subsequent cleaning workload
• All-position welding: suitable for various welding positions such as horizontal, vertical, horizontal, and vertical, meeting the welding needs of complex structures
• Stable arc: low hydrogen potassium type coating is used, the arc combustion is stable, slag removal is easy, and the weld formation is beautiful
Reliable mechanical properties
• High strength matching: deposited metal tensile strength ≥540MPa, yield strength ≥440MPa, elongation ≥17%
• Excellent crack resistance: low hydrogen formula design (diffusible hydrogen content ≤ 6.0ml/100g), effectively reducing the risk of cold cracks in welding
• Good anti-porosity: the coating composition is optimized, with good deoxidation and desulfurization capabilities, reducing the generation of pores
Technical parameter details
Chemical composition of deposited metal (%)
| Item | C | Mn | Si | S | P | Ni |
|---|---|---|---|---|---|---|
| content | ≤0.12 | ≥1.25 | ≤0.6 | ≤0.035 | ≤0.035 | 2.0-2.75 |
Mechanical properties of deposited metal
| Item | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | Impact energy (-70℃, J) |
|---|---|---|---|---|
| Standard value | ≥540 | ≥440 | ≥17 | ≥27 |
| Typical value | 550-600 | 450-500 | 18-22 | 50-80 |
Welding rod specifications and welding parameters
| Welding rod diameter (mm) | Length (mm) | Welding current (A) | Applicable welding position |
|---|---|---|---|
| 2.5 | 300 | 80-110 | All positions |
| 3.2 | 350 | 100-140 | All positions |
| 4.0 | 400 | 140-180 | Horizontal, horizontal, vertical |
Application fields and cases
Main application fields
• Cryogenic pressure vessels: liquefied petroleum gas storage tanks, propylene storage tanks, ethylene spherical tanks
• Cryogenic pipeline systems: LNG transmission pipelines, cryogenic medium transmission pipelines
• Cryogenic equipment manufacturing: refrigerators, cryogenic heat exchangers, reactors
• Special industry applications: petrochemical, coal chemical, natural gas processing, pharmaceutical, food freezing and other fields
Typical application cases
• Large ethylene storage tank welding project: A petrochemical enterprise's 3000m³ ethylene storage tank project uses AWS E8015-C1 welding electrodes for welding construction under low temperature conditions of -70℃, with a one-time pass rate of more than 98%
• LNG transportation equipment manufacturing: Provide welding solutions for LNG transport tank trucks produced by a new energy enterprise to ensure the reliability of welding joints at extremely low temperatures of -162℃
• Coal chemical cryogenic pipeline system: In a large coal chemical project, it is used for methanol synthesis gas pipeline welding under -60℃ conditions, and there has been no leakage since its operation.
Welding process guidance
Preparation before welding
1. Drying of welding rod: Dry at 350℃ for 1 hour. After drying, it should be stored in an insulation tube at 80-100℃ and can be taken out as needed
2. Cleaning of groove: Thoroughly remove oil, rust, moisture and other impurities within 20mm range of groove and both sides
3. Preheating requirements: According to the thickness and material of the parent material, the preheating temperature is generally 80-150℃, and the interlayer temperature is controlled below 200℃
Key points of welding operation
1. Power supply selection: Use DC reverse connection (DC+)
2. Welding current: Select appropriate current according to the diameter of welding rod to avoid excessive current causing coarse grains
3. Welding speed: Maintain medium welding speed to ensure good fusion and avoid too fast to cause incomplete fusion
4. Rod transport method: Use short arc operation, and the swing amplitude should not be too large
5. Interpass cleaning: After each layer of welding, the welding slag and spatter should be thoroughly removed
Post-welding treatment
1. Slow cooling: For thick plates or structures with high rigidity, slow cooling measures should be taken after welding
2. Heat treatment: If necessary, stress relief heat treatment at 600-650℃×1-2 hours can be performed
3. Inspection: Important structures should undergo non-destructive testing (UT/RT) to ensure welding quality
Quality Control and Certification
Quality Control System
• Strict raw material control: high-quality alloy steel is used, and raw materials are 100% inspected before entering the factory
• Advanced production process: vacuum induction melting + electroslag remelting to ensure uniformity and purity of components
• Comprehensive testing methods: equipped with German Spectromax spectrometer, tensile testing machine, impact testing machine, metallographic microscope and other advanced testing equipment
• Full process quality monitoring: from raw materials to finished products, covering four key links: raw material inspection, furnace inspection, semi-finished product inspection, finished product inspection
Product Certification
• ISO 9001:2008 quality management system certification
• AWS A5.5 standard certification
• GB/T 5118 standard certification
• Meet the requirements for welding materials for pressure vessels
Packaging specifications and ordering information
Packaging specifications
| Welding rod diameter (mm) | Length (mm) | Packing specifications |
|---|---|---|
| 2.5 | 300 | 1-5kg/inner box+plastic bag |
| 3.2 | 350 | 1-5kg/inner box+plastic bag |
| 4.0 | 400 | 1-5kg/inner box+plastic bag |
Ordering information
Minimum order quantity: 50kg for regular specifications
Sample policy: Free samples are provided, freight is payable
OEM service: Customized by customer brands are accepted
Delivery cycle: 7-10 working days for regular specifications
Technical support: Provide professional welding process guidance and technical consulting services
FAQ
Q: What is the difference between AWS E8015-C1 and other low-temperature steel electrodes?
A: AWS E8015-C1 is a low-temperature steel electrode with a low-hydrogen coating, containing 2.0-2.75% nickel, suitable for -70℃ working conditions. In contrast, AWS E8015-C2 contains a higher nickel content (3.0-3.75%) and is suitable for lower temperatures (-90℃), but the cost is also higher. AWS E8015-G does not contain nickel and is suitable for working conditions above -40℃.
Q: What should I do if cracks appear after welding?
A: Welding cracks are usually related to insufficient preheating, excessive hydrogen content or excessive welding stress. Recommendations: 1) Ensure sufficient preheating temperature (≥80℃); 2) Dry the electrode strictly according to regulations; 3) Use a reasonable welding sequence to reduce stress; 4) Perform post-weld heat treatment when necessary.
Q: Can it be used to weld stainless steel or other materials?
A: AWS E8015-C1 is mainly designed for low-alloy steel welding. Special stainless steel electrodes should be used for welding stainless steel. When welding dissimilar steels, appropriate welding materials should be selected according to the composition and properties of the two base materials, and process evaluation should be performed.
Q: How to store unused electrodes?
A: Unused electrodes should be stored in a dry and ventilated warehouse with a relative humidity of no more than 60% and a distance of no less than 300mm from the ground and walls. Unpacked electrodes should be used as soon as possible, and unused electrodes should be dried again, but the drying frequency should not exceed 2 times.
About Us
Hangzhou Lin'an Dayang Welding Materials Co., Ltd. was established in 1995. It is a high-tech enterprise specializing in the research and development, production and sales of welding materials. The company has a complete production line and can provide high-quality CORE ROD, MIG WIRE, TIG WIRE, FLUX WIRE and COATED ELECTRODES and other series of products.
The company always adheres to the business philosophy of "quality first, customer first", has established a strict quality management system, and is equipped with world-leading testing equipment to ensure stable and reliable product quality. The products are widely used in petrochemical, electric power, shipbuilding, bridges, machinery manufacturing and other fields, selling well in domestic and foreign markets, and are well received by customers.
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