ERNiFeCr-1
1. This is a nickel-based welding wire, part of the advanced Ni-Cr-Fe-Mo-Cu system. It is masterfully designed for high-performance tasks in environments that are both corrosive and subject to extreme temperatures. This product conforms to the AWS classification A5.14 ERNiFeCr-1, synonymous with the prestigious SNi8065 (ISO 18274) and NiFe30Cr21Mo3 under European standards.
Key Advantages:
Corrosion Resistance: It excels in environments with reducing media, such as sulfuric and phosphoric acids, and is highly effective against stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: It maintains its mechanical integrity across a vast temperature range, from cryogenic conditions up to a scorching 900°C.
Versatility: Perfectly suited for welding dissimilar metals, like nickel alloys to steel, and an excellent choice for cladding operations.
2. Chemical Composition
The composition of ERNiFeCr-1 (refer to Table 1) is specifically optimized to ensure superior weld integrity:
High Nickel (38-46%) and Iron (≥22%): These elements form a ductile matrix, which harmoniously balances thermal expansion with strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): These enhance oxidation resistance and ensure stability in environments containing chlorides and sulfides.
Low Carbon (≤0.05%) and Minimal Impurities: These characteristics help 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:
Tensile Strength: Achieves an impressive ≥550 MPa, in full compliance with the AWS A5.14 minimum standards.
Elongation: Exhibits excellent ductility with elongation rates between 25-34%.
Impact Toughness: Retains impeccable properties even in sub-zero environments, such as 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, recognized under SNi8065.
F-Number 45 (ASME IX): This qualifies the welding procedures essential for pressure vessel fabrication.
Quality Control: Requires comprehensive Material Test Certificates (MTC) and must pass stringent RT/PT nondestructive testing.
5. Applications
Primary Use: Ideal for welding INCOLOY 825 (UNS N08825) and other similar Ni-Fe-Cr-Mo-Cu alloys.
Critical Industries:
Petrochemical: Perfect for reactors and acid-processing equipment.
Nuclear: Essential for steam generator tubes and pressure vessels.
Aerospace: Vital for turbine components that endure thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Employs 100% argon shielding, making it ideal for precision joints, especially in thin tubing.
MIG (GMAW): Experience unparalleled welding excellence with our recommended argon-helium blend in a 75%-25% ratio, tailored for impeccable, deeper penetration in thicker sections. This dynamic combination ensures not only robust weld quality but also enhances the overall structural integrity of your projects.
Parameters Overview (Refer to Table 2 for an exhaustive array of detailed specifications):
Preheat/Cleaning: Achieve the pinnacle of welding precision by meticulously eradicating all traces of oil and oxides. Employ advanced mechanical or chemical cleaning methods to secure a pristine surface, fundamentally crucial for attaining optimal welding results.
Interpass Temperature: Vigilantly maintain a temperature of ≤150°C to prevent the detrimental formation of carbide precipitation, thereby safeguarding the weld's structural integrity and ensuring long-lasting performance.
Table 2: Standardized Welding Parameters for Optimal Performance - A Comprehensive Guide
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas - Your Go-To Specifications for Superior Welding
TIG 0.9-3.2 60-220 (DCEN) 12-20 100% Argon is the choice for artisans of welding, offering unparalleled precision and control.
MIG 0.9-1.6 150-250 26-33 A perfect blend of 75% Argon + 25% Helium, engineered for enhanced penetration and unmatched stability.
Source: A Trusted Reference for Your Welding Needs
7. Procurement and Handling Guidelines - Ensuring Quality from Start to Finish
Packaging: Available in versatile coils and spools with diameters ranging from 0.8 to 5.0 mm, designed to meet diverse professional demands. Available in user-friendly 10-25 kg units, facilitating effortless handling and optimal storage.
Storage: Preserve the integrity of your welding materials by storing them in a dry environment with humidity levels below 60%, effectively preventing any moisture absorption that could compromise weld quality.
8. Common Challenges & Their Effective Solutions - Mastering the Art of Welding
Porosity: Typically resulting from gas impurities, this challenge can be expertly managed by our solutions. → Ensure the use of high-purity argon (99.99%) to meticulously eliminate impurities and achieve flawlessly perfect welds every time.
Hot Cracking: Mitigate this risk by employing a strategy of low heat input and minimizing joint restraints, thus maintaining the weld's integrity and ensuring superior results.
| 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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