Inconel 52M (ERNiCrFe-7A) Welding Wire Guide

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Overview

Inconel 52M (AWS ERNiCrFe-7A) is a modified version of Inconel 52 with optimized chemistry for improved resistance to ductility dip cracking. Designed specifically for nuclear applications requiring superior weld quality and reliability.

Welding Parameters

Parameter	GTAW	GMAW
Shielding Gas	Argon (99.995%)	Ar + 2% He or Ar + 2% CO2
Gas Flow Rate	8-15 L/min	15-25 L/min
Wire Diameter	1.6-3.2 mm	0.8-1.6 mm
Current Type	DCEN	DCEP
Welding Position	All positions	Flat / Horizontal

Applications

Inconel 52M welding wire is used in a wide range of demanding applications:

• Nuclear Power: Primary circuit welds in PWR nuclear plants.
• Overlay Cladding: Nuclear vessel internal cladding.
• Inconel 690: Welding of steam generator and reactor components.
• Repair Welding: Repair of nuclear components and dissimilar joints.
• Critical Applications: Welds requiring resistance to stress corrosion cracking.

Available Product Forms

Hangbo Alloy Group supplies Inconel 52M welding wire in the following forms:

• TIG Wire: Straight lengths 1000 mm, diameters 1.6 mm, 2.0 mm, 2.4 mm, 3.2 mm.
• MIG Wire: Precision-wound spools (D200, D300), diameters 0.8 mm, 1.0 mm, 1.2 mm, 1.6 mm.
• SAW Wire: Coils for submerged arc welding, diameters 2.4 mm, 3.2 mm, 4.0 mm.

Related Standards

Standard	Description
AWS A5.14	ERNiCrFe-7A
ISO 18274	S Ni 6054
EN ISO 18274	S Ni 6054
ASME SFA-5.14	ERNiCrFe-7A

Chemical Composition of ERNiCrFe-7A Welding Wire (wt%)

Element	Content (%)
Nickel (Ni)	Balance
Chromium (Cr)	28.0 – 31.5
Iron (Fe)	7.0 – 11.0
Niobium (Nb)	0.50 – 1.00
Manganese (Mn)	0.50 max
Carbon (C)	0.04 max

Mechanical Properties of Deposited Metal

Property	Typical Value
Tensile Strength	620 MPa (90 ksi) min
Yield Strength (0.2%)	350 MPa (51 ksi) min
Elongation	30% min
Service Temperature	up to 650°C (1200°F)

Values above are typical for as-welded Inconel 52M (ERNiCrFe-7A) deposited metal under AWS A5.14 classification requirements. Actual results vary with welding process, heat input and shielding gas.

Why Choose Inconel 52M Welding Wire

• Specifically engineered to resist primary-water stress corrosion cracking (PWSCC) in nuclear dissimilar metal welds.
• Higher chromium (~30%) combined with controlled niobium and manganese greatly reduces DCSCC susceptibility.
• Qualified for reactor pressure vessel nozzle-to-safe-end and steam generator tube-to-tubesheet welds.
• Superior crack growth resistance versus earlier generation fillers such as Alloy 82/182.

Welding Best Practices

Follow these practical guidelines to obtain sound, corrosion-resistant welds with this filler metal:

• Apply as a buttering layer on the ferritic steel side before completing the dissimilar joint.
• Maintain interpass temperature below 175°C (350°F) with tightly controlled heat input.
• Use automatic GTAW where possible — consistent travel speed is critical to nuclear weld quality.
• Perform liquid penetrant and volumetric examination per ASME Section III requirements.

Frequently Asked Questions

Contact Us for Inconel 52M

Hangbo Alloy Group supplies Inconel 52M (ERNiCrFe-7A) welding wire with full material certifications. We ensure consistent wire quality with precise diameter control, clean surface finish, and uniform feeding performance.

For quotations, material certifications, or technical consultation, contact our sales team or call +86 166 2109 2936.