ERNiCrFe-2 (SNi7718) Nickel-Based Welding Wire – Premium Filler Metal for Inconel Alloys
Product Overview
ERNiCrFe-2 (GB/T 15620 SNi7718, AWS A5.14 ERNiCr-3) is a nickel-chromium-iron-niobium welding wire designed for Gas Tungsten Arc Welding (GTAW)of high-performance alloys, including Inconel 718, 706, and X-750. With superior crack resistance and high-temperature strength, it ensures reliable joints in critical aerospace, power generation, and chemical processing applications.
Compliance & Certifications
International Standards:
AWS A5.14 ERNiCr-3
ASME SFA-5.14 ERNiCr-3
AWS 5836
Chinese Standard: GB/T 15620 SNi7718
Key Features
Optimized Composition: High nickel (≥67%) with niobium (2–3%) for stress corrosion cracking resistance.
Mechanical Strength: Minimum tensile strength of 1138 MPa (165,000 psi).
Oxidation Resistance: Chromium (18–22%) enhances high-temperature stability.
Low Impurities: Controlled carbon, sulfur, and phosphorus content (≤0.05%) to minimize weld defects.
Chemical Composition (%)
Element | Ni | Cr | Fe | Nb | Ti | C | Mn | Si | S | P | Cu |
Content | ≥67 | 18–22 | ≤3.0 | 2.0–3.0 | ≤0.75 | ≤0.05 | 2.5–3.5 | ≤0.5 | ≤0.015 | ≤0.015 | ≤0.50 |
Mechanical Properties
Tensile Strength | Yield Strength | Elongation |
≥1138 MPa | – | – |
Available Product Forms
Spooled Wire (MIG):
Diameter: 0.8–1.2 mm
Precision layer-wound for smooth feeding.
Straight Rods (TIG):
Diameter: 1.2–3.2 mm
Cut-to-length for manual welding.
Recommended Applications
Aerospace: Jet engine components, turbine blades.
Oil & Gas: Downhole tools, pressure vessels.
Nuclear: Reactor internals, heat exchangers.
General Industry: Welding of nickel-based superalloys.
Why Choose ERNiCrFe-2?
Consistent Performance: Uniform composition ensures stable arc and minimal spatter.
Versatility: Compatible with both automated (MIG) and manual (TIG) processes.
Traceability: Fully certified with mill test reports.
Request a quote for spool sizes, technical data packs, or welding procedure support.
Note: Chemical composition and mechanical properties may vary slightly by manufacturing batch. Always refer to the product datasheet for specific values.
Optimization Highlights:
Hierarchical Structure: Clear sections for quick navigation.
Data Emphasis: Bolded key metrics (e.g., tensile strength) for visibility.
Action-Oriented: Direct call-to-action for inquiries.
Regulatory Clarity: Listed standards upfront for compliance assurance.