ERNiFeCr-1
1. Presenting a superior nickel-based welding wire (Ni-Cr-Fe-Mo-Cu system), meticulously crafted for top-tier performance in arduous, corrosive, and thermally challenging environments. Adhering to the AWS classification A5.14 ERNiFeCr-1, this exceptional product aligns with SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), ensuring global compatibility.
Key Advantages:
Corrosion Resistance: Unrivaled in reducing media, such as sulfuric and phosphoric acids, and fortified against stress corrosion cracking, pitting, and crevice corrosion.
Thermal Stability: Exhibits steadfast mechanical integrity across a wide temperature spectrum, from cryogenic extremes up to a robust 900°C.
Versatility: Expertly suited for welding dissimilar metals, such as nickel alloys to steel, and adept at cladding operations.
2. Chemical Composition
The composition of ERNiFeCr-1 (refer to Table 1) is precisely engineered for outstanding weld integrity:
High Nickel (38-46%) and Iron (≥22%): Construct a ductile matrix that harmonizes thermal expansion with strength.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): Amplify oxidation resistance and stability against chlorides and sulfides.
Low Carbon (≤0.05%) and minimal impurities: Curtail the risk 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: Exceeds 550 MPa, conforming to AWS A5.14's stringent minimum requirements.
Elongation: Ranges from approximately 25-34%, showcasing remarkable ductility.
Impact Toughness: Maintains its formidable 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: Rigorously specifies chemical and mechanical properties.
ISO 18274: Ensures global standardization under SNi8065.
F-Number 45 (ASME IX): Qualifies welding procedures for high-pressure vessels.
Quality Control: Demands Material Test Certificates (MTC) and success in RT/PT nondestructive testing.
5. Applications
Primary Use: Specifically designed for welding INCOLOY 825 (UNS N08825) and analogous Ni-Fe-Cr-Mo-Cu alloys.
Critical Industries:
Petrochemical: Ideal for reactors and acid-processing equipment.
Nuclear: Essential for steam generator tubes and pressure vessels.
Aerospace: Perfect for turbine components subjected to thermal cycling.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding; exceptionally suited for precision joints, such as those in thin tubes.
MIG (GMAW): Elevate your welding prowess with an argon-helium blend of 75%-25%, specifically crafted for deeper penetration in thicker sections. This fusion guarantees unmatched weld quality and fortifies structural integrity to new heights.
Parameters Overview (Refer to Table 2 for a comprehensive dive into the detailed specifications that promise exceptional welding outcomes):
Preheat/Cleaning: To achieve flawless welding results, it's imperative to purge every trace of oil and oxides. Employ either mechanical or chemical cleaning methods to ensure an immaculate surface that sets the stage for superior welds.
Interpass Temperature: Diligently maintain a temperature of ≤150°C to prevent the perilous formation of carbide precipitation, safeguarding the weld's integrity and longevity.
Table 2: Standardized Welding Parameters for Achieving Optimal Performance - Your guide to precision and excellence.
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas
TIG 0.9-3.2 60-220 (DCEN) 12-20 100% Argon for precision and control that transforms every weld into a masterpiece.
MIG 0.9-1.6 150-250 26-33 75% Argon + 25% Helium for penetrating power and stability that stands the test of time.
Source:
7. Procurement and Handling Guidelines - Ensure seamless acquisition and management of your materials.
Packaging: Choose from convenient coils and spools, with diameters spanning from 0.8 to 5.0 mm, tailored to meet your specific needs. Available in user-friendly 10-25 kg units, simplifying handling and storage for optimal efficiency.
Storage: Preserve weld quality by storing in a dry environment, maintaining humidity levels below 60% to avert moisture absorption.
8. Common Challenges & Their Effective Solutions - Tackle obstacles with confidence and precision.
Porosity: Typically a byproduct of gas impurities → Ensure the use of high-purity argon (99.99%) to eradicate impurities and attain impeccable welds.
Hot Cracking: Mitigate the risk by employing low heat input and minimizing joint restraints to uphold weld integrity and strength.
| 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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