ERNiFeCr-1
1. Introducing our high-performance nickel-based welding wire, ERNiFeCr-1 (Ni-Cr-Fe-Mo-Cu system), expertly crafted for demanding applications in environments subjected to corrosive elements and extreme temperatures. Classified under AWS A5.14 ERNiFeCr-1, this exceptional product also aligns with SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), ensuring global recognition and reliability.
Key Advantages:
Corrosion Resistance: Masterfully engineered to excel against reducing media like sulfuric and phosphoric acids, while effectively resisting stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: Proudly maintains its mechanical integrity across a wide temperature range, from cryogenic levels up to a robust 900°C.
Versatility: Expertly tailored for welding dissimilar metals, such as joining nickel alloys to steel, and perfect for cladding operations.
2. Chemical Composition
ERNiFeCr-1's expertly balanced composition (see Table 1) is designed for exceptional weld integrity and performance.
High Nickel (38-46%) and Iron (≥22%): These elements form a ductile matrix, ensuring an optimal balance of thermal expansion and mechanical strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): Enhance oxidation resistance and provide remarkable stability in environments rich in chlorides and sulfides.
Low Carbon (≤0.05%) and Controlled Impurities: Thoughtfully minimized to significantly reduce the risk 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: Achieving a remarkable strength of ≥550 MPa, surpassing the AWS A5.14 minimum requirements.
Elongation: Exhibiting excellent ductility with an elongation range of approximately 25-34%.
Impact Toughness: Remarkably retains its properties even in sub-zero environments, making it ideal for applications such as cryogenic storage tanks.
4. Technical Standards and Certification
Governed by a comprehensive set of standards:
AWS A5.14/ASME SFA-5.14: Ensures adherence to stringent chemical and mechanical specifications.
ISO 18274: Globally standardized specification (SNi8065) for consistent and reliable usability across markets.
F-Number 45 (ASME IX): Validates welding procedures, especially for pressure vessel applications.
Quality Control: Demands Material Test Certificates (MTC) and successful completion of RT/PT nondestructive testing to guarantee unmatched quality.
5. Applications
Primary Use: Ideal for welding INCOLOY 825 (UNS N08825) and similar Ni-Fe-Cr-Mo-Cu alloys, ensuring superior performance.
Critical Industries:
Petrochemical: Perfect for reactors and acid-processing equipment, offering unparalleled reliability.
Nuclear: Essential for steam generator tubes and pressure vessels, supporting the highest safety standards.
Aerospace: Ideal for turbine components subjected to rigorous thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, ensuring precision in every joint, particularly with thin tubes. Perfectly engineered for applications requiring refined precision and expertise.
MIG (GMAW): Achieve unparalleled results with deeper penetration in thicker sections using a specially formulated argon-helium blend at a precise 75%-25% ratio. This expertly crafted combination guarantees superior weld quality and significantly enhances the structural integrity of your projects.
Parameters Overview: (Refer to Table 2 for an exhaustive compilation of detailed specifications that ensure optimal welding performance.)
Preheat/Cleaning: Achieve pristine surfaces for optimal welding results by eliminating any traces of oil and oxides. Employ either mechanical or chemical cleaning methods, a critical step to ensure superior weld quality and longevity.
Interpass Temperature: Diligently maintain a temperature of ≤150°C to prevent the formation of carbide precipitation. This meticulous control is vital to preserving the weld's integrity and ensuring long-lasting results.
Table 2: Discover the Standardized Welding Parameters meticulously crafted for Optimal Performance.
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas: An essential guide for achieving consistent and high-quality welds.
TIG 0.9-3.2 60-220 (DCEN) 12-20: Utilize 100% Argon for precise, controlled, and superior welding outcomes.
MIG 0.9-1.6 150-250 26-33: Optimize penetration and stability with a strategic blend of 75% Argon and 25% Helium.
Source: Reference for expert insights and further information.
7. Procurement and Handling Guidelines: Essential insights for optimal usage and storage.
Packaging: Choose from coils and spools with diameters ranging from 0.8 to 5.0 mm, tailored to meet diverse welding needs. Available in convenient 10-25 kg units, designed for easy handling and efficient storage.
Storage: Maintain a dry environment with humidity levels below 60% to prevent moisture absorption and protect weld quality.
8. Common Challenges & Their Effective Solutions: Navigate welding challenges with confidence.
Porosity: Often a consequence of gas impurities, compromising weld quality. → Ensure the use of high-purity argon (99.99%) to effectively eliminate impurities and achieve flawless, professional-grade welds.
Hot Cracking: Mitigate risks by adopting low heat input strategies and minimizing joint restraints to ensure weld integrity and durability.
| 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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