Hangbo Alloy Group
Shanghai · Est. 2012
AWS ERNiCrMo-7 / UNS N06455 — Welding wire specifications, parameters, and applications for nickel alloy fabrication.
Hastelloy C-4 (AWS ERNiCrMo-7) is a low-carbon nickel-chromium-molybdenum welding wire for welding Hastelloy C-4 and similar alloys. Provides excellent resistance to a wide range of corrosive environments with good weldability.
| 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 |
Hastelloy C-4 welding wire is used in a wide range of demanding applications:
Hangbo Alloy Group supplies Hastelloy C-4 welding wire in the following forms:
| Standard | Description |
|---|---|
| AWS A5.14 | ERNiCrMo-7 |
| ISO 18274 | S Ni 6455 |
| EN ISO 18274 | S Ni 6455 |
| DIN 1736 | SG-NiCr16Mo16 |
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 14.0 – 18.0 |
| Molybdenum (Mo) | 14.0 – 17.0 |
| Titanium (Ti) | 0.70 max |
| Iron (Fe) | 3.0 max |
| Carbon (C) | 0.015 max |
| Property | Typical Value |
|---|---|
| Tensile Strength | 690 MPa (100 ksi) min |
| Yield Strength (0.2%) | 300 MPa (44 ksi) min |
| Elongation | 35% min |
| Service Temperature | up to 1040°C (1900°F) |
Values above are typical for as-welded Hastelloy C-4 (ERNiCrMo-7) deposited metal under AWS A5.14 classification requirements. Actual results vary with welding process, heat input and shielding gas.
Follow these practical guidelines to obtain sound, corrosion-resistant welds with this filler metal:
Hastelloy C-4 is titanium-stabilised and has very low iron, so it resists grain-boundary precipitation during welding and high-temperature service better than C-276 — ideal for as-welded equipment that sees heat.
It retains strength and ductility from cryogenic temperatures up to roughly 1040°C (1900°F), which is why it is common in waste incineration and high-temperature chemical plant.
It handles dilute hydrochloric acid, but for concentrated reducing acid service the high-molybdenum B-series alloys such as Hastelloy B-2 are usually preferred.
AWS ERNiCrMo-7 / UNS N06455: nickel balance, 14-18% chromium, 14-17% molybdenum and very low carbon and silicon for thermal stability.
C-4 has no tungsten and very low iron, giving improved thermal stability and resistance to intergranular attack in the as-welded condition.
AWS A5.14 (ERNiCrMo-7), ISO/EN 18274 (S Ni 6455) and DIN 1736 (SG-NiCr16Mo16).
TIG wire 1.6-3.2 mm, MIG spools 0.8-1.6 mm and SAW coils 2.4-4.0 mm.
Pure argon for GTAW; argon with helium or CO2 additions for GMAW.
Chemical process equipment, scrubber components and high-purity pharmaceutical systems.
Hangbo Alloy Group supplies Hastelloy C-4 (ERNiCrMo-7) 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.
Request a quotation for Hastelloy C-4 round bars, tubes, plates, or custom products. We stock standard sizes and accept custom orders.