ERNiFeCr-1
1. Introducing a state-of-the-art nickel-based welding wire, the ERNiFeCr-1 (Ni-Cr-Fe-Mo-Cu system). This advanced wire is meticulously engineered for high-performance applications, adeptly navigating corrosive and extreme thermal conditions with ease. Proudly classified under AWS A5.14 ERNiFeCr-1, this versatile welding wire is also known as SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), making it a global standard in welding solutions.
Key Advantages:
Corrosion Resistance: Designed to excel in harsh environments, this wire shows superior performance in reducing media like sulfuric and phosphoric acids, while resisting stress corrosion cracking, pitting, and crevice corrosion for unwavering durability.
Thermal Stability: Engineered to maintain its mechanical integrity across a vast temperature range, from the coldest cryogenic conditions to a scorching 900°C, ensuring reliable performance at every turn.
Versatility: Perfectly suitable for welding dissimilar metals, such as joining nickel alloys to steel, this wire is also ideal for cladding operations, making it a versatile addition to your welding toolkit.
2. Chemical Composition
ERNiFeCr-1 is crafted with precision, its composition (refer to Table 1) expertly optimized to ensure impeccable weld integrity and performance.
High Nickel (38-46%) and Iron (≥22%): These elements form a ductile matrix that beautifully balances thermal expansion and strength, essential for robust and reliable welds.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): These crucial elements significantly enhance oxidation resistance and provide stability even in challenging chloride and sulfide environments.
Low Carbon (≤0.05%) and Impurities: Specifically tailored to minimize risks of intergranular corrosion, ensuring the longevity and durability 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: Achieving a robust ≥550 MPa, this wire meets and exceeds the AWS A5.14 minimum specifications, ensuring strength and reliability in every application.
Elongation: Exhibiting a remarkable elongation rate of approximately 25-34%, this wire showcases excellent ductility, allowing for flexibility and resilience in demanding conditions.
Impact Toughness: Designed to retain its impressive properties even in sub-zero environments, making it an excellent choice for cryogenic storage tanks and similar applications.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: Ensures rigorous adherence to chemical and mechanical specifications, guaranteeing a high-quality product.
ISO 18274: This standard ensures global consistency and reliability under the SNi8065 classification.
F-Number 45 (ASME IX): This classification qualifies welding procedures, especially important for pressure vessels, affirming the wire's high standard.
Quality Control: Intensively monitored through Material Test Certificates (MTC) and rigorous RT/PT nondestructive testing, ensuring that each wire meets the highest quality benchmarks.
5. Applications
Primary Use: Specially crafted for welding INCOLOY 825 (UNS N08825) and similar high-performance Ni-Fe-Cr-Mo-Cu alloys, providing unmatched results.
Critical Industries:
Petrochemical: Ideal for reactors and acid-processing equipment, this wire stands out in demanding environments.
Nuclear: Designed for crucial components like steam generator tubes and pressure vessels, ensuring safe and reliable operations.
Aerospace: Essential for turbine components that undergo intense thermal cycling, offering exceptional durability and performance.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, making it the preferred choice for precision joints, especially in applications involving thin tubes. ideal for precision joints (e.g., thin tubes).
MIG (GMAW): Unlock superior welding with enhanced penetration in thicker sections using a masterful blend of argon and helium at a precise 75%-25% ratio. This potent combination guarantees robust weld quality, elevating structural integrity to unparalleled levels.
Parameters Overview (For comprehensive specifications, please refer to Table 2):
Preheat/Cleaning: Prioritize the elimination of oils and oxides meticulously through mechanical or chemical cleaning techniques. This pivotal step ensures a flawless surface, paving the way for exceptional welding results.
Interpass Temperature: Vigilantly maintain an interpass temperature of ≤150°C to effectively prevent carbide precipitation, safeguarding the weld's structural integrity.
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 Utilize 100% Argon to ensure precise and controlled welding, achieving superior results.
MIG 0.9-1.6 150-250 26-33 Leverage a 75% Argon + 25% Helium mix for enhanced penetration and welding stability.
Source:
7. Procurement and Handling Guidelines
Packaging: Offered in coils and spools, available in diameters from 0.8 to 5.0 mm for versatile applications. Available in user-friendly 10-25 kg units, facilitating easy handling and efficient storage.
Storage: Preserve in a dry setting with humidity below 60% to prevent moisture absorption, thus ensuring top-tier weld quality.
8. Common Challenges & Their Effective Solutions
Porosity: Typically arises from gas impurities → Use ultra-high-purity argon (99.99%) to completely eliminate impurities, ensuring flawless and impeccable welds.
Hot Cracking: Mitigate this risk by utilizing low heat input and minimizing joint constraints to uphold weld integrity.
| 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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