ERNiFeCr-1
1. Crafted for excellence, this nickel-based welding wire (Ni-Cr-Fe-Mo-Cu system) is your go-to solution for demanding applications in corrosive and extreme temperature environments. Its robust design ensures unmatched performance and reliability. Belonging to the renowned AWS classification A5.14 ERNiFeCr-1, this product is equivalent to SNi8065 (ISO 18274) and NiFe30Cr21Mo3 (European standard), ensuring global compatibility and quality.
Key Advantages:
Corrosion Resistance: Perfectly suited for reducing media, such as sulfuric and phosphoric acids, it offers remarkable resistance to stress corrosion cracking, pitting, and crevice corrosion, guaranteeing durability.
Thermal Stability: Demonstrates exceptional mechanical integrity across a wide range of temperatures, from cryogenic conditions up to an impressive 900°C.
Versatility: Ideal for welding dissimilar metals, such as nickel alloys to steel, and suitable for cladding operations, this product exemplifies adaptability and performance.
2. Chemical Composition
ERNiFeCr-1's composition (refer to Table 1) is meticulously optimized to ensure impeccable weld integrity, enhancing performance in every application:
High Nickel (38-46%) and Iron (≥22%): Combined to form a ductile matrix, effectively balancing thermal expansion and strength for optimal results.
Chromium (19.5-23.5%) and Molybdenum (2.5-3.5%): Deliver superior oxidation resistance and stability in environments containing chlorides and sulfides.
Low Carbon (≤0.05%) and Impurities: Thoughtfully minimized to reduce intergranular corrosion risks and enhance longevity.
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 AWS A5.14 standards for strength and reliability.
Elongation: Boasting an impressive range of ~25-34%, it offers exceptional ductility for versatile applications.
Impact Toughness: Retains its formidable properties even in sub-zero conditions, ideal for cryogenic storage tanks and more.
4. Technical Standards and Certification
Governed by:
AWS A5.14/ASME SFA-5.14: Ensures adherence to stringent chemical and mechanical specifications for unmatched quality.
ISO 18274: Guarantees global standardization as SNi8065, assuring worldwide recognition and trust.
F-Number 45 (ASME IX): Facilitates the qualification of welding procedures, particularly for pressure vessels.
Quality Control: Demands Material Test Certificates (MTC) and requires successful RT/PT nondestructive testing to uphold quality.
5. Applications
Primary Use: Expertly designed for welding INCOLOY 825 (UNS N08825) and similar Ni-Fe-Cr-Mo-Cu alloys, ensuring reliable performance.
Critical Industries:
Petrochemical: Precisely used in reactors and acid-processing equipment, where performance is paramount.
Nuclear: Essential for steam generator tubes and pressure vessels, where safety and reliability are crucial.
Aerospace: Perfect for turbine components that endure thermal cycling, ensuring long-lasting efficiency.
6. Welding Process Guidelines
Methods:
TIG (GTAW): Utilizes 100% argon shielding, making it perfect for precision joints, such as thin tubes. Ideal for precision joints (e.g., thin tubes).
MIG (GMAW): For achieving unmatched penetration depth in thicker material sections, employ an expertly crafted argon-helium blend in a precise 75%-25% ratio. This carefully selected mixture not only assures exceptional weld quality but also significantly bolsters structural integrity.
Parameters Overview (Please consult Table 2 for a comprehensive set of detailed specifications):
Preheat/Cleaning: To attain the highest standards of welding excellence, it is imperative to fully eradicate any remnants of oil and oxides. This can be achieved through meticulous mechanical or chemical cleaning techniques, thereby ensuring an immaculate surface conducive to optimal welding results.
Interpass Temperature: Diligently maintain the interpass temperature at or below 150°C. This precision is vital to forestall the formation of carbide precipitation, which could potentially jeopardize the weld's integrity.
Table 2: Standardized Welding Parameters for Unmatched Performance and Quality
Process Diameter (mm) Current (A) Voltage (V) Shielding Gas
TIG 0.9-3.2 60-220 (DCEN) 12-20 Employ 100% Argon for achieving precise, controlled welding outcomes, ensuring the highest level of craftsmanship.
MIG 0.9-1.6 150-250 26-33 Utilize a 75% Argon + 25% Helium mix to ensure enhanced penetration, stability, and superior weld performance.
Source:
7. Procurement and Handling Guidelines
Packaging: Available in versatile coils and spools, with diameters ranging from 0.8 to 5.0 mm, designed for diverse applications. Available in user-friendly 10-25 kg units, facilitating effortless handling and convenient storage.
Storage: Ensure storage in a dry environment maintaining humidity levels below 60% to avert moisture absorption that could detrimentally affect weld quality.
8. Common Challenges & Their Effective Solutions
Porosity: Typically arises from impurities present in the gas. → Ensure the use of high-purity argon (99.99%) to eradicate impurities, thereby achieving flawless, impeccable welds.
Hot Cracking: Mitigate the risk by employing a low heat input strategy and minimizing joint restraints, thereby preserving 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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