Standard	Classification
AWS A5.14	ERNiMo-7
ASME SFA-5.14	ERNiMo-7
Corresponding Base Alloy	Hastelloy B-2 (UNS N10665)
Corr. A5.11/A5.11M	ENiMo-7

Note: ERNiMo-7 is suitable for TIG (GTAW) and MIG (GMAW) welding processes, as well as plasma arc welding (PAW), especially for aggressive reducing corrosive service environments.

Element	Ni	Mo	Fe	C	Mn	Si	Co	P	S
Content (%)	Balance (65% min.)	26.0–30.0	≤ 2.0	≤ 0.02	≤ 1.0	≤ 0.10	≤ 1.0	≤ 0.030	≤ 0.015

The nickel-molybdenum composition with high molybdenum content provides exceptional resistance to uniform corrosion in reducing media and outstanding resistance to pitting and crevice corrosion.

Property	Typical Value
Tensile Strength	≥ 690–760 MPa
Yield Strength (0.2% offset)	≥ 310 MPa
Elongation (4d)	≥ 20–30%
Melting Range	1330–1380°C
Density	~9.2 g/cm³

Note: Typical values are for reference only. Actual mechanical properties may vary depending on welding parameters, joint design, and base material condition

Ø Exceptional resistance to uniform corrosion in reducing acid media (hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid)

Ø Excellent resistance to pure hydrochloric acid across a wide range of concentrations and temperatures under reducing conditions

Ø Good resistance to pitting and crevice corrosion in chloride-containing environments

Ø Natural immunity to chloride stress corrosion cracking due to fully austenitic structure

Ø Very low carbon content prevents carbide precipitation and intergranular corrosion

Ø Low iron and silicon contents minimize formation of brittle intermetallic phases during thermal processing

Ø Excellent thermal stability for service in demanding reducing environments

Ø Smooth arc characteristics for efficient TIG and MIG welding operations

Diameter options:

• 0.8 mm / 1.0 mm / 1.2 mm / 1.6 mm / 2.4 mm (0.030″ – 0.094″)

Packaging:

• 5 kg / 12.5 kg / 15 kg plastic spools
• 250 kg / 500 kg drums
• TIG cut lengths: 915 mm / 1000 mm in sealed tubes
• Custom packaging available upon request

Ø Reliable production quality meeting AWS A5.14 requirements

Ø Strict quality control for nickel-molybdenum alloy wires

Ø Clean wire surface for smooth feeding and stable arc

Ø Global export experience with on-time delivery

Ø Technical support for welding procedure qualification

1. What is ERNiMo-7 welding wire used for?

ERNiMo-7 is primarily used for welding nickel-molybdenum alloys such as Hastelloy® B-2 (UNS N10665) and Hastelloy® B-3 (UNS N10675), as well as for cladding steel with nickel-molybdenum weld metal and dissimilar joints.

2. What are the key corrosion resistance properties of ERNiMo-7?

It provides exceptional resistance to uniform corrosion in reducing acid media, particularly hydrochloric acid at all concentrations and temperatures. It also offers excellent resistance to pitting, crevice corrosion, and natural immunity to chloride stress corrosion cracking.

3. In what environments should ERNiMo-7 NOT be used?

ERNiMo-7 should NOT be used in strong oxidizing environments (such as concentrated nitric acid, or hydrochloric acid containing high-valent iron/copper ions or free chlorine), as oxidizing conditions rapidly disrupt its passive film.

4. Which welding processes are recommended?

TIG (GTAW), MIG (GMAW), and plasma arc welding (PAW) are all suitable. Pure argon is recommended for TIG welding, while argon-helium mixtures are preferred for MIG applications.

5. What is the interpass temperature control requirement?

Interpass temperature should be strictly controlled to below 120°C to prevent weld metal overheating and grain growth

Contact our technical team for alloy selection support, product datasheets, or a customized quotation for your project.