ERNiFeCr-1
1. Presenting a remarkable nickel-based welding wire, the ERNiFeCr-1 is crafted from a sophisticated Ni-Cr-Fe-Mo-Cu system. It is engineered for delivering unmatched performance in environments that are both corrosive and subjected to extreme thermal conditions. This welding wire is classified under AWS A5.14 ERNiFeCr-1, sharing its esteemed reputation with SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard).
Key Advantages:
Corrosion Resistance: The wire demonstrates exceptional performance in reducing media such as sulfuric and phosphoric acids while effectively resisting stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: Ensures robust mechanical integrity across a wide temperature spectrum, from cryogenic levels soaring up to 900°C.
Versatility: It is adept at welding dissimilar metals, including nickel alloys to steel, and is ideal for cladding applications.
2. Chemical Composition
The chemical makeup of ERNiFeCr-1 is meticulously optimized to ensure superior weld integrity as detailed in Table 1:
High Nickel (38-46%) and Iron (≥22%): These elements form a ductile matrix essential for balancing thermal expansion with strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): These enhance its resistance to oxidation and stability when exposed to chlorides and sulfides.
Low Carbon (≤0.05%) and limited impurities: These features minimize the risk of intergranular corrosion, thus preserving integrity.
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: With a minimum of ≥550 MPa, it meets the stringent AWS A5.14 requirements.
Elongation: Offering an impressive range of 25-34%, it exhibits excellent ductility.
Impact Toughness: Its resilience is retained even in sub-zero environments, perfect for cryogenic storage applications.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: Establishes rigorous chemical and mechanical specifications.
ISO 18274: Provides a framework for global standardization (SNi8065).
F-Number 45 (ASME IX): Validates welding procedures for high-stakes pressure vessels.
Quality Control: Includes mandatory Material Test Certificates (MTC), and ensures reliability through RT/PT nondestructive testing.
5. Applications
Primary Use: Essential for welding INCOLOY 825 (UNS N08825) and similar Ni-Fe-Cr-Mo-Cu alloys.
Critical Industries:
Petrochemical: Integral for reactors and equipment used in acid processing.
Nuclear: Suited for steam generator tubes and pressure vessels.
Aerospace: Essential for turbine components that encounter thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, making it ideal for precise joints such as those found in thin tubes. Ideal for precision joints such as thin tubes.
MIG (GMAW): Achieve unparalleled penetration with our recommended argon-helium blend at a 75%-25% ratio. This powerful combination delivers exceptional weld quality, significantly enhancing the structural integrity of thicker sections.
Parameters Overview: Please refer to Table 2 for a comprehensive breakdown of detailed specifications that guide optimal welding performance.
Preheat/Cleaning: Elevate your welding outcomes by thoroughly removing oil and oxides through meticulous mechanical or chemical cleaning methods. This critical step ensures an immaculate surface, setting the stage for superior weld quality.
Interpass Temperature: Diligently keep the temperature at or below ≤150°C to prevent carbide precipitation, safeguarding the weld's integrity and longevity.
Table 2: Standardized Welding Parameters for Achieving Optimal Performance
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas
TIG 0.9-3.2 60-220 (DCEN) 12-20 Utilize 100% Argon for unparalleled precision and control in your welding processes.
MIG 0.9-1.6 150-250 26-33 Opt for 75% Argon + 25% Helium to boost penetration depth and welding stability.
Source:
7. Procurement and Handling Guidelines
Packaging: Offered in both coils and spools, with diameters stretching from 0.8 to 5.0 mm, catering to diverse handling needs. Available in manageable 10-25 kg units, these packages ensure ease of handling and efficient storage.
Storage: Secure your welding wire in a dry environment, maintaining humidity below 60% to avoid moisture absorption that can compromise weld quality.
8. Common Challenges & Their Effective Solutions
Porosity: Primarily caused by gas impurities, affecting weld quality. → Combat porosity by using superior high-purity argon (99.99%) to eradicate impurities, ensuring flawless and high-integrity welds.
Hot Cracking: Minimize risks by adopting low heat inputs and reducing joint restraints, crucial for 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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