ERNiFeCr-1
1. This remarkable nickel-based welding wire, part of the Ni-Cr-Fe-Mo-Cu system, is meticulously engineered for ultra-high-performance applications, particularly in hostile, corrosive, and extreme thermal environments. It aligns with AWS classification A5.14 ERNiFeCr-1, and is also known under SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), ensuring global compatibility and recognition.
Key Advantages:
Corrosion Resistance: This wire offers exceptional resistance in reducing environments like sulfuric and phosphoric acids, effectively curbing stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: It maintains mechanical robustness from cryogenic temperatures up to an impressive 900°C, underpinning its reliability in extreme conditions.
Versatility: Ideally suited for welding dissimilar metals, such as nickel alloys to steel, and efficiently supports cladding operations.
2. Chemical Composition
The composition of ERNiFeCr-1 is meticulously optimized to ensure superior weld integrity (refer to Table 1):
High Nickel (38-46%) and Iron (≥22%): These elements form a ductile matrix that strikes an ideal balance between thermal expansion and mechanical strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): These components bolster oxidation resistance and stability, particularly in chloride and sulfide environments.
Low Carbon (≤0.05%) and Minimal Impurities: These features are crucial for minimizing the risks of intergranular corrosion.
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: Boasting a tensile strength of ≥550 MPa, this wire meets and exceeds the stringent AWS A5.14 minimum requirements.
Elongation: Demonstrates excellent ductility with an elongation range of approximately 25-34%.
Impact Toughness: It retains its exceptional properties even in sub-zero environments, making it ideal for cryogenic storage tanks.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: These standards mandate rigorous chemical and mechanical specifications.
ISO 18274: Ensures global standardization, referenced as SNi8065.
F-Number 45 (ASME IX): Qualifies welding procedures, particularly for pressure vessels, ensuring compliance and safety.
Quality Control: Comprehensive quality assurance includes Material Test Certificates (MTC) and rigorous RT/PT nondestructive testing.
5. Applications
Primary Use: Expertly crafted for welding INCOLOY 825 (UNS N08825) and similar Ni-Fe-Cr-Mo-Cu alloys.
Critical Industries:
Petrochemical: Essential for reactors and acid-processing equipment.
Nuclear: Vital for steam generator tubes and pressure vessels, ensuring integrity under high-stress conditions.
Aerospace: Perfect for turbine components that undergo extensive thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, ensuring precision and purity. Ideal for achieving flawless precision joints, especially in delicate applications such as thin tubes.
MIG (GMAW): Unlock the full potential of your welding capabilities with our expertly recommended argon-helium blend, featuring a precise 75%-25% ratio. This mixture is designed to deliver superior, deeper penetration in thicker sections, ensuring robust weld quality and significantly enhancing structural integrity, making it the ideal choice for challenging welding tasks.
Parameters Overview (Refer to Table 2 for detailed specifications): Discover a comprehensive collection of critical specifications designed to optimize your welding process and performance.
Preheat/Cleaning: Elevate your welding results by meticulously eliminating any traces of oil and oxides. Choose between mechanical or chemical cleaning methods to achieve a pristine surface, a crucial step in ensuring optimal welding performance and impeccable results.
Interpass Temperature: Rigorously maintain a temperature of ≤150°C to expertly prevent the formation of detrimental carbide precipitation, safeguarding the weld's integrity and ensuring long-lasting quality.
Table 2: Standardized Welding Parameters for Optimal Performance: This essential table presents a detailed array of standardized parameters, meticulously designed to maximize welding efficiency and effectiveness.
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas: A thorough outline to guide you through the precise specifications required for achieving optimal welding results.
TIG 0.9-3.2 60-220 (DCEN) 12-20 100% Argon: Experience precision and control with this configuration, ensuring every welding task is executed with finesse and accuracy.
MIG 0.9-1.6 150-250 26-33 75% Argon + 25% Helium: Gain unparalleled penetration and stability with this expertly balanced gas mix, crafted for professional-grade outcomes.
Source: Discover the origins and credentials of our high-quality welding solutions, ensuring reliability and excellence in every application.
7. Procurement and Handling Guidelines: Comprehensive guidance for procuring and handling our premium welding products, ensuring optimal usage and longevity.
Packaging: Our versatile packaging options, available in coils and spools with diameters from 0.8 to 5.0 mm, cater to a wide range of welding needs. Available in convenient 10-25 kg units for easy handling and storage: Designed to simplify transport and storage while maintaining product integrity.
Storage: Ensure your welding wire's performance by storing in a dry environment, with humidity levels below 60%, effectively preventing moisture absorption and preserving weld quality.
8. Common Challenges & Their Effective Solutions: Discover actionable strategies to overcome common welding challenges, ensuring seamless operations and impeccable results.
Porosity: Often a result of gas impurities, this common issue can compromise weld quality and durability. → Ensure the use of high-purity argon (99.99%) to eliminate impurities and achieve flawless welds: Elevate your welding quality by selecting only the purest argon, ensuring each weld is as flawless as it is robust.
Hot Cracking: Reduce the risk by employing low heat input and minimizing joint restraints to maintain weld integrity: Implement these expert techniques to effectively reduce the risk of hot cracking, ensuring continuous integrity and reliability in your welds.
| 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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