Nickel Welding Rods
Classification: Welding rod
Model:ENiCrMo-11 nickel welding rods
Classification: Nickel-based alloy welding rod
Why choose ENiCrMo-11?
As a high-alloy nickel-based welding material, ENiCrMo-11 fundamentally solves the welding problems in high-temperature, high-pressure and highly corrosive environments. Its three core highlights directly hit the pain points of the industry:
Super strong corrosion resistance ceiling: Containing 22% chromium, 14% molybdenum and a small amount of tungsten, its tolerance to corrosive media such as chloride ions, sulfuric acid and phosphoric acid far exceeds that of ordinary stainless steel welding materials, and is especially suitable for highly corrosive scenes such as chemical storage tanks and offshore platforms.
High-temperature stability without shortcomings: When used for a long time below 650℃, the weld metal strength retention rate reaches more than 90%, avoiding the risk of cracking caused by temperature fluctuations, and is the preferred choice for welding of power station boilers and high-temperature pipelines.
Welding forming zero rework: The arc is concentrated and the amount of spatter is 30% lower than the industry average, the weld is smooth and pore-free, reducing the later grinding and finishing process, and indirectly improving construction efficiency.
Professional parameters witness excellent quality
1. Welding operability
Arc stability: With optimized alloy ratio, the arc burns continuously and stably, and there is no arc breaking even in the low voltage range of 10-15V, so novices can quickly get started.
Current application range: When DC is reversed, the current can be flexibly adjusted in the range of 80-220A (φ2.5mm welding rod is recommended to be 100-140A, φ3.2mm is recommended to be 140-180A), suitable for welding of base materials of different thicknesses.
Welding speed: In the welding of 12mm thick Inconel 625 base material, the single-pass welding speed can reach 80-100mm/min, which is 15% higher than that of similar welding materials.
2. Mechanical and corrosion resistance
Mechanical properties at room temperature: The tensile strength of the weld metal is ≥690MPa, and the elongation is ≥30%, which meets the strength requirements of high-voltage equipment welding.
Corrosion resistance index: After immersion in 5% sulfuric acid solution (25℃) for 1000 hours, the corrosion rate is ≤0.02mm/year; in 3.5% sodium chloride solution, the pitting resistance index (PREN) is ≥45, far exceeding the industry's seawater corrosion resistance standard.
High temperature performance: At 600℃, the yield strength of the weld metal remains above 420MPa, and there is no obvious tendency of intergranular corrosion.
How to use method
1. Preparation before welding
• Pretreatment of parent material: Use a stainless steel wire brush to remove the oxide scale, oil and moisture on the surface of the parent material. It is recommended to use sandpaper to polish until the metallic luster is exposed; if the parent material is Hastelloy, Monel alloy, etc., it needs to be cleaned separately to avoid cross contamination.
• Preparation of welding materials: Dry at 250℃ for 1 hour before use, and store in 80-100℃ insulation cylinder after drying to avoid secondary moisture absorption; the exposure time of the welding rod shall not exceed 4 hours, and it needs to be dried again (repeated up to 2 times) if it exceeds.
2. Key points of welding process
• Parameter setting: Select the diameter according to the thickness of the parent material (φ2.5mm for 3-8mm parent material, φ3.2mm for 8-15mm parent material), welding current 100-180A, arc voltage 12-18V, welding speed controlled at 70-120mm/min.
•Operation specification: short arc welding is adopted, and the arc length shall not exceed 1.2 times of the electrode diameter; the interlayer temperature shall be controlled below 150℃ (can be achieved by forced air cooling); for multi-pass welding, the weld surface shall be cleaned with a stainless steel wire brush after each pass.
•Protection requirements: windproof measures shall be taken for outdoor welding (wind speed ≤ 2m/s), and a protective drag cover shall be used when necessary; argon gas protection (flow rate 5-10L/min) is recommended for back welding.
3. Post-welding treatment
•After welding, it is necessary to cool naturally to room temperature and avoid forced water cooling (to prevent stress cracks);
•For workpieces with strict requirements, stress relief treatment can be carried out at 600-650℃ for 2 hours (heating rate ≤ 50℃/h);
•Finally, the weld surface shall be checked with penetrant testing (PT) to ensure that there are no defects such as cracks and pores.
Customer reviews: real feedback from the front line
Mr. Li
A chemical equipment department
Manager Wang
A marine engineering company
Engineer Zhang
A power station construction group
FAQ
Q: What base materials are suitable for ENiCrMo-11?
A: It is mainly suitable for nickel-based alloys (such as Inconel 625, Hastelloy C276), high-chromium stainless steel (such as 310S) and titanium alloy composite plates. It can also be used for welding dissimilar materials (such as stainless steel and nickel-based alloys).
Q: Compared with ENiCrMo-3, what are its advantages?
A: ENiCrMo-11 has a higher molybdenum content (14% vs 10%), and its resistance to pitting and crevice corrosion is increased by more than 40%. At the same time, tungsten is added, and the high-temperature strength is 15%-20% higher than ENiCrMo-3, which is more suitable for harsh working conditions.
Q: Are there any special requirements for the storage of welding materials?
A: It needs to be stored in a dry and ventilated environment (relative humidity ≤ 60%). The unopened package can be stored for 12 months. If it is not used up after opening, it needs to be sealed and placed in a moisture-proof box (temperature 20-25℃). It is recommended to use it up within 1 month.
Q: Can it replace imported welding materials of the same type?
A: It is consistent with imported ENiCrMo-11 in composition (in accordance with AWS A5.14 standard) and performance, and has passed SGS third-party testing. It has achieved import substitution in domestic chemical, nuclear power and other fields, and has a higher cost-effectiveness.
Conclusion
ENiCrMo-11 has three core advantages: "corrosion resistance + high temperature + easy welding", making it a reliable choice for welding in strong corrosion and high temperature environments. Whether it is chemical equipment, marine engineering or energy power stations, it can reduce the subsequent maintenance costs from the source of welding. Contact us now to get free welding process guidance and sample testing services.
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