ERNiFeCr-1
1. Introducing an advanced nickel-based welding wire (Ni-Cr-Fe-Mo-Cu system), meticulously engineered for top-tier performance in environments that are both corrosive and subject to extreme thermal conditions. This superior product is classified under AWS A5.14 ERNiFeCr-1, and is equivalent to SNi8065 (ISO 18274) and NiFe30Cr21Mo3 as per European standards.
Key Advantages of ERNiFeCr-1:
Corrosion Resistance: Demonstrates exceptional performance in reducing environments like sulfuric and phosphoric acids, while effectively resisting stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: Remarkable capability to maintain mechanical integrity across a broad temperature range, from cryogenic levels to a high of 900°C.
Versatility at its Best: Ideally suited for welding dissimilar metals, such as nickel alloys to steel, and is perfect for cladding operations.
2. Chemical Composition
The chemical composition of ERNiFeCr-1 (refer to Table 1) is precisely optimized to ensure unparalleled weld integrity:
High Nickel (38-46%) and Iron (≥22%): Create a resilient, ductile matrix, offering a perfect balance between thermal expansion and strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): Provide elevated oxidation resistance and stability when exposed to chlorides and sulfides.
Low Carbon (≤0.05%) and Reduced Impurities: Effectively minimize 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 Characteristics:
Tensile Strength: ≥550 MPa, conforming to AWS A5.14 minimum requirements.
Elongation: Approximately 25-34%, signifying outstanding ductility.
Impact Toughness: Maintains excellent properties even in sub-zero environments, ideal for applications like cryogenic storage tanks.
4. Technical Standards and Certification
Adherence to the following standards:
AWS A5.14/ASME SFA-5.14: Dictates strict chemical and mechanical specifications.
ISO 18274: Ensures global standardization, recognized as SNi8065.
F-Number 45 (ASME IX): Authorizes welding procedures, particularly for pressure vessels.
Quality Assurance: Includes Material Test Certificates (MTC) and successful RT/PT nondestructive testing.
5. Applications
Primary Application: Specifically designed for welding INCOLOY 825 (UNS N08825) and other Ni-Fe-Cr-Mo-Cu alloy counterparts.
Key Industries of Impact:
Petrochemical: Essential for reactors and acid-processing equipment.
Nuclear: Suitable for steam generator tubes and pressure vessels.
Aerospace: Vital for turbine components that endure thermal cycling.
6. Welding Process Guidelines
Recommended Methods:
TIG (GTAW): Requires 100% argon shielding; perfectly suited for precision joints like those found in thin tubes.
MIG (GMAW): For achieving unparalleled penetration, particularly in thicker sections, we recommend using a premium argon-helium blend at a precise mix of 75%-25%. This dynamic blend not only ensures a superior weld quality but also significantly enhances the overall structural integrity, delivering results you can rely on.
Parameters Overview: (Refer to Table 2 for comprehensive technical specifications and ensure every detail is tailored to your specific welding needs.)
Preheat/Cleaning: To guarantee a flawless welding surface, it is imperative to meticulously remove any oil and oxides. Opt for mechanical or chemical cleaning methods, ensuring a pristine surface that leads to exceptional welding outcomes.
Interpass Temperature: Vigilantly maintain temperatures at or below 150°C to effectively prevent undesirable carbide precipitation, thereby safeguarding the weld's integrity and strength.
Table 2: Standardized Welding Parameters for Optimal Performance: Your reference for achieving consistent excellence in welding applications.
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas: Expertly curated parameters for precision and reliability.
TIG 0.9-3.2 60-220 (DCEN) 12-20 100% Argon: Perfect for delivering precise and meticulously controlled welding results.
MIG 0.9-1.6 150-250 26-33 75% Argon + 25% Helium: Engineered for enhanced penetration and unrivaled stability.
Source: The authoritative guide for all your welding requirements.
7. Procurement and Handling Guidelines: Detailed insights into sourcing and managing materials efficiently.
Packaging: Offered in convenient coils and spools, with diameters ranging from 0.8 to 5.0 mm, tailored to meet diverse handling and welding demands. Available in easy-to-handle 10-25 kg units, ensuring effortless storage and seamless handling.
Storage: Preserve in a dry environment with humidity under 60%. This practice is crucial to prevent moisture absorption, ensuring top-notch weld quality.
8. Common Challenges & Their Effective Solutions: Navigate through welding hurdles with ease.
Porosity: Commonly caused by gas impurities, learn how to address and prevent it effectively. → Ensure the utilization of high-purity argon (99.99%) to eradicate impurities, providing you with flawless, top-tier welds.
Hot Cracking: Minimize this risk by applying a low heat input approach and reducing joint restraints, thereby maintaining robust 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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