ERNiFeCr-1
1. Introducing a superb nickel-based welding wire, part of the Ni-Cr-Fe-Mo-Cu system, engineered to deliver outstanding performance in both corrosive and extreme thermal environments. This high-performance wire stands out where others fail. Proudly classified under AWS A5.14 ERNiFeCr-1, this wire is also known as SNi8065 (ISO 18274) and NiFe30Cr21Mo3 according to the European standard, making it a true global contender in welding technology.
Key Advantages:
Corrosion Resistance: Triumphs in environments with reducing media such as sulfuric and phosphoric acids. It resists stress corrosion cracking, pitting, and crevice corrosion, ensuring longevity and reliability.
Thermal Stability: Maintains its robust mechanical integrity from the iciest cryogenic temperatures to a scorching 900°C, ensuring versatility in application.
Versatility: Perfectly suited for welding dissimilar metals, such as nickel alloys to steel, and adept at cladding operations, showcasing its adaptability.
2. Chemical Composition
ERNiFeCr-1's meticulously formulated composition (detailed in Table 1) is crafted to optimize weld integrity and performance:
High Nickel (38-46%) and Iron (≥22%): These create a ductile matrix that beautifully balances thermal expansion with strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): These elements fortify the wire's oxidation resistance and stability in the presence of chlorides and sulfides.
Low Carbon (≤0.05%) and minimal impurities: These attributes are crucial in minimizing the risks of intergranular corrosion, preserving the integrity of your welds.
Table 1: Chemical Composition (Weight %)
Element Ni Fe Cr Mo Cu Mn Si Others
Range 38-46% ≥22% 19.5-23.5% 2.5-3.5% 1.5-3.0% ≤1% ≤0.5% Ti:0.6-1.2%; Al≤0.2%
Source:3. Mechanical Properties
As-Welded Performance:
Tensile Strength: With a minimum of 550 MPa, it confidently meets AWS A5.14 standards, ensuring robust welds.
Elongation: With an impressive range of approximately 25-34%, it offers excellent ductility.
Impact Toughness: Maintains formidable properties even in sub-zero conditions, such as those found in cryogenic storage tanks.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: Sets rigorous chemical and mechanical specifications, ensuring top-tier quality.
ISO 18274: Ensures global standardization with the SNi8065 designation.
F-Number 45 (ASME IX): Qualifies welding procedures specifically for high-stakes pressure vessels.
Quality Control: Each batch necessitates Material Test Certificates (MTC) and must pass stringent RT/PT nondestructive testing for assured quality.
5. Applications
Primary Use: Perfectly crafted for welding INCOLOY 825 (UNS N08825) and similar Ni-Fe-Cr-Mo-Cu alloy structures.
Critical Industries:
Petrochemical: Essential for reactors and acid-processing equipment, providing unmatched durability.
Nuclear: Ideal for steam generator tubes and pressure vessels, ensuring safety and efficiency.
Aerospace: Designed for turbine components that endure intense thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, making it the optimal choice for precision joints, such as those found in thin tubes.
MIG (GMAW): To achieve an unparalleled depth of penetration in thicker metal sections, employ a strategic argon-helium blend in a precise 75%-25% ratio. This powerful combination not only guarantees exceptional weld quality but also significantly bolsters structural integrity, ensuring your welding projects stand the test of time.
Parameters Overview (Refer to Table 2 for detailed specifications):
Preheat/Cleaning: Achieving optimal welding results necessitates the thorough removal of all traces of oil and oxides. Utilize either mechanical or chemical cleaning methods to ensure a pristine, uncontaminated surface, setting the stage for superior welding performance.
Interpass Temperature: Carefully maintain a temperature of ≤150°C to prevent the detrimental formation of carbide precipitation. This crucial practice preserves the weld's integrity and ensures a flawless, long-lasting bond.
Table 2: Standardized Welding Parameters for Optimal Performance
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas
TIG 0.9-3.2 60-220 (DCEN) 12-20 100% Argon. This configuration allows for precise and controlled welding, ensuring accuracy and finesse in every project.
MIG 0.9-1.6 150-250 26-33 75% Argon + 25% Helium. This blend is designed for enhanced penetration and stability, giving you the robust performance needed for challenging welding tasks.
Source:
7. Procurement and Handling Guidelines
Packaging: Our welding wires are available in coils and spools, with diameters ranging from 0.8 to 5.0 mm, catering to diverse application needs; Available in practical 10-25 kg units, these packages are designed for easy handling and hassle-free storage, making them ideal for both small-scale and industrial applications.
Storage: To maintain the superior quality of your welding wire, store it in a dry environment where humidity levels remain below 60%. This precaution prevents moisture absorption, which could otherwise compromise weld quality.
8. Common Challenges & Their Effective Solutions
Porosity: Often a result of gas impurities, this issue can be a significant barrier to achieving high-quality welds. → To ensure flawless welds, use high-purity argon (99.99%) in your processes. This eliminates impurities, paving the way for seamless, high-integrity welds.
Hot Cracking: Mitigate the risk by employing a low heat input strategy and minimizing joint restraints. This approach ensures the weld's integrity and durability, even under challenging conditions.
| AWS A5.4 |
ERNi-1 |
ERNiCu-7 |
ERNiCr-3 |
ERNiCrFe-5 |
ERNiCrMo-3 |
ERNiCrMo-4 |
ERNiCrMo-7 |
| TS(N/mm2) |
460 |
541 |
671 |
560 |
790 |
729 |
780 |
| EL(%) |
30 |
39 |
39 |
30 |
43 |
33 |
35 |
| C |
0.02 |
0.02 |
0.03 |
0.03 |
0.0037 |
0.002 |
0.05 |
| Mn |
0.3 |
1.7 |
3.05 |
1 |
0.03 |
0.12 |
0.6 |
| Si |
0.16 |
0.44 |
0.37 |
0.04 |
0.029 |
0.07 |
0.02 |
| P |
0.0012 |
0.007 |
/ |
0.004 |
0.003 |
0.003 |
0.003 |
| Ti |
2.3 |
/ |
0.01 |
/ |
0.088 |
/ |
/ |
| S |
0.005 |
0.008 |
/ |
0.002 |
0.001 |
0.0015 |
|
| Cr |
/ |
/ |
19.86 |
15.7 |
21.95 |
15.9 |
16.7 |
| Ni |
96.5 |
65.68 |
72.8 |
75.06 |
64.65 |
REM |
REM |
| Cu |
/ |
REM |
0.06 |
0.03 |
0.009 |
0.008 |
/ |
| Mo |
/ |
/ |
/ |
0.03 |
9.04 |
15.9 |
15.8 |
| Nb |
/ |
/ |
2.4 |
2.3 |
3.61 |
/ |
/ |
| V |
/ |
/ |
/ |
/ |
/ |
0.01 |
/ |
| Fe |
/ |
0.7 |
0.23 |
7.9 |
0.19 |
4.12 |
2.2 |
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