ERNiFeCr-1
1. Elevate your welding capabilities with our nickel-based ERNiFeCr-1 wire, meticulously crafted for high-performance tasks in environments that challenge both corrosion resistance and thermal endurance. This premium welding wire is classified under AWS A5.14 ERNiFeCr-1 and is a standout equivalent to SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), ensuring global compatibility and recognition.
Key Advantages:
Corrosion Resistance: Demonstrates exceptional performance in reducing environments like sulfuric and phosphoric acids, while effectively combating stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: Engineered to uphold its mechanical integrity across a vast temperature range, from the coldest cryogenic conditions to a robust 900°C.
Versatility: Perfect for welding various metals, including nickel alloys to steel, and ideal for cladding operations, offering unmatched adaptability.
2. Chemical Composition
ERNiFeCr-1's carefully balanced composition (detailed in Table 1) ensures superior weld integrity.
High Nickel (38-46%) and Iron (≥22%): These crucial elements form a ductile matrix, optimizing thermal expansion balance and enhancing strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): Crucial for boosting oxidation resistance, especially in environments with chlorides and sulfides.
Low Carbon (≤0.05%) and Minimization of Impurities: These factors are key to reducing 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: A solid ≥550 MPa, meeting the stringent AWS A5.14 standards for durability and reliability.
Elongation: Exhibits a superior range of ~25-34%, indicating excellent ductility for diverse applications.
Impact Toughness: Maintains robust properties even in sub-zero settings, vital for applications like cryogenic storage tanks.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: Ensures rigorous adherence to chemical and mechanical specifications.
ISO 18274: Guarantees global standardization as SNi8065, facilitating international deployment.
F-Number 45 (ASME IX): Validates welding procedures, especially for pressure vessels in critical conditions.
Quality Control: Demands comprehensive Material Test Certificates (MTC) and stringent RT/PT nondestructive testing to assure quality.
5. Applications
Primary Use: Expertly designed for welding INCOLOY 825 (UNS N08825) and analogous Ni-Fe-Cr-Mo-Cu alloys.
Critical Industries:
Petrochemical: Essential for fabricating reactors and acid-processing equipment.
Nuclear: Integral for constructing steam generator tubes and pressure vessels.
Aerospace: Ideal for turbine components subjected to dynamic thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, ensuring precision welding for intricate joints, such as those in thin tubes. ideal for precision joints (e.g., thin tubes) .
MIG (GMAW): Unleash the power of superior, deeper penetration in thicker sections with an argon-helium blend in a perfect 75%-25% ratio. This formidable combination guarantees robust weld quality, significantly enhancing structural integrity and ensuring a flawless finish.
Parameters Overview (For comprehensive information, refer to Table 2 for detailed specifications):
Preheat/Cleaning: Prioritize the removal of any traces of oil and oxides through either mechanical or chemical cleaning methods. This crucial step is essential in presenting a pristine surface, paving the way for optimal welding results that promise durability and strength.
Interpass Temperature: Diligently maintain a temperature of ≤150°C to effectively prevent the formation of carbide precipitation, safeguarding the weld's integrity and ensuring long-lasting performance.
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 for precise, controlled, and meticulous welding.
MIG 0.9-1.6 150-250 26-33 75% Argon + 25% Helium for enhanced penetration and unparalleled stability.
Source:
7. Procurement and Handling Guidelines
Packaging: Offered in coils and spools with diameters from 0.8 to 5.0 mm, catering to diverse needs and applications; Conveniently available in 10-25 kg units, ensuring easy handling and efficient storage.
Storage: Preserve in a dry environment with humidity levels maintained below 60% to effectively prevent moisture absorption that could potentially affect weld quality.
8. Common Challenges & Their Effective Solutions
Porosity: Often arising from gas impurities, → Ensure the utilization of high-purity argon (99.99%) to fully eliminate impurities, achieving flawless, impeccable welds.
Hot Cracking: Mitigate the risk by employing low heat input and reducing joint restraints, thereby maintaining impeccable weld integrity and reliability.
| 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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