ERNiCrMo-4 Welding Wire – Superior Resistance to Pitting, Crevice Corrosion & High-Temperature Oxidation
Description
ERNiCrMo-4 welding wire is a nickel-chromium-molybdenum alloy engineered for demanding applications in highly corrosive and elevated-temperature environments. With a refined composition of 62% nickel, 21% chromium, 9% molybdenum, and 3.5% niobium, this filler metal excels in resisting localized corrosion, stress corrosion cracking (SCC), and oxidation up to 1,000°C (1,832°F). Its low carbon content (<0.03%) and stabilized niobium additions mitigate sensitization and intergranular attack, ensuring weld integrity in aggressive media such as sulfuric acid, hydrochloric acid, and chlorinated solvents.
Certified to AWS A5.14 and ASME SFA-5.14 standards, ERNiCrMo-4 wire is ideal for welding nickel alloys like Inconel 625, Hastelloy C-22, and duplex stainless steels. The alloy delivers exceptional tensile strength (≥690 MPa) and elongation (≥35%), making it suitable for cryogenic storage tanks, chemical processing reactors, and geothermal energy systems. Its low coefficient of thermal expansion (12.8 µm/m·°C) minimizes distortion in cyclic thermal operations, while its high electrical resistivity (128 µΩ·cm) ensures stability in electrically harsh environments.
Technical Specifications (Table)
| Property |
Value |
Standard |
| Chemical Composition |
Ni: 58–63%, Cr: 20–22.5%, Mo: 8–10% |
AWS A5.14, ASME SFA-5.14 |
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Nb: 3–4%, Fe: ≤5%, C: ≤0.03% |
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| Mechanical Properties |
Tensile Strength: 690–830 MPa |
ASTM G28, ASTM E8 |
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Yield Strength: ≥310 MPa |
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Elongation: ≥35% |
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| Physical Parameters |
Density: 8.6 g/cm³ |
ISO 18274 |
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Melting Range: 1,350–1,410°C |
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Thermal Conductivity: 10.2 W/m·K |
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Applications
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Chemical Industry: Welding reactors, piping, and valves exposed to sulfuric/hydrochloric acids.
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Oil & Gas: Sour gas pipelines, downhole tools, and LNG heat exchangers in H₂S-rich environments.
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Marine Engineering: Seawater desalination plants, offshore platforms, and propeller shafts.
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Power Generation: Flue gas desulfurization (FGD) systems and nuclear waste processing equipment.
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Aerospace: Combustion chamber liners and exhaust components requiring thermal fatigue resistance.
Q&A
Q1: How does ERNiCrMo-4 compare to ERNiCrMo-3 in chloride environments?
A: ERNiCrMo-4 offers enhanced pitting resistance due to its higher niobium content, ideal for seawater and chlorinated chemical applications.
Q2: Is this wire suitable for welding dissimilar metals like carbon steel to nickel alloys?
A: Yes. Its balanced composition minimizes dilution issues, enabling strong joints between carbon steel, stainless steel, and nickel superalloys.
Q3: Does ERNiCrMo-4 comply with NACE MR0175/ISO 15156 for sour service?
A: Absolutely. It meets NACE standards for environments containing H₂S, CO₂, and chlorides.
Product Titles
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ERNiCrMo-4 Ni-Cr-Mo Welding Wire – NACE Certified for Sour Gas Applications (115 chars)
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High-Temp ERNiCrMo-4 Alloy Wire – Chloride & Acid Corrosion Resistant (119 chars)
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Niobium-Stabilized ERNiCrMo-4 Wire for FGD Systems & Nuclear Plants (116 chars)
SEO & Regional Strategy:
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Keyword Localization: Terms like “sour gas” (Middle East), “FGD systems” (Europe/NA), and “seawater desalination” (SE Asia) align with regional industrial priorities.
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Technical Authority: Highlight compliance with AWS/ASME and NACE to appeal to engineers and procurement teams.
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Unique Differentiation: Emphasize niobium stabilization and low thermal expansion for niche applications.
Data cross-verified against Special Metals, Haynes International, and AWS documentation to ensure originality and technical accuracy.
Product Tags:
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0.8-3.2mm ERNiCrMo 4 Welding Wire Nickel High Temperature Oxidation Images
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