ERNiCrMo-4 Filler Metal Specification, Uses, and Advantages

At Metals and Welding Specialities, we provide premium-grade ERNiCrMo-4 welding filler metals designed to deliver superior performance, durability, and weld integrity.

What is ECoCr-A?

ERNiCrMo-4 is a nickel-chromium-molybdenum welding filler metal classified under AWS A5.14 standards. It is primarily used for welding Hastelloy C-276 (UNS N10276) and similar high-performance alloys.

This alloy is engineered to perform in highly corrosive and high-temperature environments, offering excellent resistance to both oxidizing and reducing conditions.

ERNiCrMo-4 Chemical Composition

The unique composition of ERNiCrMo-4 contributes to its outstanding properties:

• Nickel (Ni): Balance
• Chromium (Cr): 14.5 – 16.5%
• Molybdenum (Mo): 15 – 17%
• Iron (Fe): 4 – 7%
• Tungsten (W): 3 – 4.5%
• Minor elements: Mn, Si, Co, Cu, C, P, S

This composition enhances resistance to pitting, crevice corrosion, and stress corrosion cracking.

Specifications of ERNiCrMo-4 Filler Metal

ERNiCrMo-4 meets international standards and is available in multiple forms:

• Standard: AWS A5.14 / ASME SFA 5.14
• Forms: TIG rods, MIG wire, coils, and spools
• Diameter Range: 0.8 mm to 4.0 mm
• Typical Tensile Strength: ~690–790 MPa
• Elongation: ~40%

These specifications ensure high strength, ductility, and weld reliability.

Key Uses of ERNiCrMo-4 Filler Metal

1. Chemical & Petrochemical Industry

Used for welding equipment exposed to aggressive acids like sulfuric and hydrochloric acid.

2. Oil & Gas Sector

Ideal for pipelines, offshore structures, and refinery components operating in harsh environments.

3. Power Generation Plants

Suitable for high-temperature and high-pressure applications.

4. Pharmaceutical & Food Processing

Ensures contamination-free and corrosion-resistant welds.

5. Wastewater Treatment & Pollution Control

Handles corrosive chemicals and harsh fluids effectively.

6. Dissimilar Metal Welding

Can weld nickel alloys to stainless steel and other metals efficiently.

Advantages of ERNiCrMo-4 Filler Metal

• Exceptional Corrosion Resistance
  Resists pitting, crevice corrosion, and chloride-induced cracking, even in extreme chemical environments.
• High Strength and Durability
  Offers excellent tensile strength and structural integrity under stress.
• Excellent Weldability
  Low carbon content minimizes carbide precipitation, ensuring clean and strong welds.
• Versatility
  Suitable for both similar and dissimilar welding applications, including cladding and surfacing.
• Superior Performance in Extreme Conditions
  Maintains performance in oxidizing, reducing, and high-temperature environments.

Why Choose Metals and Welding Specialities for ERNiCrMo-4?

• Premium-quality ERNiCrMo-4 filler metals
• Compliance with international standards
• Custom sizes and specifications
• Reliable supply for industrial applications
• Technical support for material selection

Our goal is to help industries achieve stronger, safer, and longer-lasting welds.

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FAQ – ERNiCrMo-4 Filler Metal

1. What is ERNiCrMo-4 used for?

ERNiCrMo-4 is mainly used for welding high-performance nickel alloys like Hastelloy® C-276. It is widely applied in chemical processing, oil & gas, power plants, and marine environments where extreme corrosion resistance is required.

2. Which base metals can be welded with ERNiCrMo-4?

It is commonly used with nickel-chromium-molybdenum alloys, stainless steels, and for dissimilar metal welding between nickel alloys and steel grades.

3. What makes ERNiCrMo-4 corrosion resistant?

Its high content of nickel, chromium, molybdenum, and tungsten provides strong resistance against pitting, crevice corrosion, and stress corrosion cracking in harsh chemical environments.

4. Is ERNiCrMo-4 suitable for high-temperature applications?

Yes, it performs exceptionally well in both high-temperature and highly corrosive conditions, making it suitable for power generation and refinery equipment.

5. What welding processes are compatible with ERNiCrMo-4?

It is commonly used in GTAW (TIG), GMAW (MIG), and SAW processes depending on the application and form of filler metal.

6. What forms is ERNiCrMo-4 available in?

It is available in TIG rods, MIG wires, coils, and spools in various diameters as per industrial requirements.

7. Why is ERNiCrMo-4 preferred for chemical industries?

Because it provides outstanding resistance to aggressive acids such as sulfuric and hydrochloric acid, ensuring long-lasting weld integrity in chemical processing equipment.

8. Can ERNiCrMo-4 be used for repair welding?

Yes, it is highly effective for repair and maintenance welding of corrosion-resistant equipment due to its excellent weldability and mechanical strength.