Quick answer: ERNiCrMo-4 is a nickel-chromium-molybdenum bare welding electrode and rod classification covered by AWS A5.14/A5.14M. It is commonly associated with welding Alloy C-276 (UNS N10276). The classification alone, however, does not define the welding process, wire form, diameter, package, certificate requirements or approval for a particular joint. A useful RFQ should state all of these items and identify the governing welding procedure.
What Does ERNiCrMo-4 Mean?
ERNiCrMo-4 is a filler-metal classification, not a complete purchase specification. Under the AWS naming system, it identifies a bare nickel-chromium-molybdenum electrode or rod with the composition requirements assigned to the “-4” classification.
AWS A5.14/A5.14M covers nickel and nickel-alloy bare welding electrodes, strip electrodes and rods. It addresses classification requirements such as chemical composition, as well as general requirements, testing, packaging and identification. The applicable edition should be stated in the purchase order because standard editions change over time.
This distinction matters during procurement. A buyer who requests only “C-276 welding wire” may leave several commercial and technical questions unanswered:
- Is the required product a straight rod or a spooled wire?
- Which welding process will be used?
- What diameter and package are required?
- Which standard edition and certificate fields must be supplied?
- Does the approved WPS identify ERNiCrMo-4 for the proposed joint?
For available product forms and quotation fields, review the ERNiCrMo-4 nickel alloy welding wire product page.
ERNiCrMo-4, ENiCrMo-4 and Alloy C-276 Are Not the Same Description
The three terms are related, but they describe different things.
| Term | What it identifies | Main procurement point |
|---|---|---|
| ERNiCrMo-4 | Bare electrode or rod classification under AWS A5.14/A5.14M | Specify the form, diameter, package, quantity and applicable standard edition |
| ENiCrMo-4 | Covered electrode classification under AWS A5.11/A5.11M | It is a different product form and should not be used as a substitute description for bare wire or rod |
| Alloy C-276 / UNS N10276 | Nickel-chromium-molybdenum base-alloy designation | The base-material designation does not replace the filler-metal classification or welding procedure |
Authoritative C-276 alloy documentation associates bare welding rods and wire with ERNiCrMo-4, while covered electrodes are identified as ENiCrMo-4. The initial “ER” and “E” therefore cannot be treated as a minor wording difference.
Why ERNiCrMo-4 Is Associated with Alloy C-276
Alloy C-276 is a nickel-chromium-molybdenum alloy used in corrosion-resistant service. Published alloy documentation lists ERNiCrMo-4 for bare welding rods and wire used with C-276.
That relationship is useful when reviewing a material list, but it is not by itself a welding approval. Filler-metal selection can also depend on:
- The exact base materials on both sides of the joint
- Whether the joint is similar-metal, dissimilar-metal or overlay work
- Service temperature and corrosive environment
- Required mechanical and corrosion performance
- Welding process, heat input and joint design
- The qualified WPS/PQR and project code
For this reason, an RFQ should describe the intended application without asking the supplier to infer the final engineering decision. Approval of the filler metal and procedure should remain with the responsible welding engineer or another qualified authority.
Specify the Product Form and Welding Process
ERNiCrMo-4 can be supplied as a bare filler-metal product, but the required form must match the process and feeding method stated in the approved procedure.
| RFQ field | What the buyer should state | Why it matters |
|---|---|---|
| Welding process | GTAW, GMAW or another process identified by the WPS | The process determines the required product form and feeding method |
| Product form | Straight rod, spooled wire or another clearly defined form | “Welding wire” alone may be ambiguous |
| Diameter | Nominal diameter and permitted tolerance, if project-specific | The diameter must match equipment and procedure requirements |
| Rod length or spool details | Length for rods, or spool and package details for wire | Prevents a technically correct alloy from arriving in an unusable form |
| Quantity and unit | Total weight, number of packages or number of rods, as applicable | Avoids uncertainty during quotation |
| Identification | Required classification, standard edition and lot marking | Supports receipt inspection and traceability |
Do not select a diameter or package from a general web page without checking the actual quotation. Available forms can vary, and any required tolerances or package limitations should be confirmed before order placement.
What to Request on the Certificate
Certificate expectations should be written into the RFQ rather than assumed after shipment. Depending on the project, the buyer may request the following information:
| Certificate check | Question to confirm |
|---|---|
| Classification | Does the document identify ERNiCrMo-4? |
| Governing standard | Does it state AWS A5.14/A5.14M and the required edition? |
| Chemical analysis | Are the reported elements and results traceable to the supplied lot? |
| Lot or heat identity | Can the package marking be connected to the certificate? |
| Product form and size | Do the form and nominal dimensions agree with the purchase order? |
| Manufacturer identification | Is the producer or responsible source clearly identified? |
| Supplementary documents | Are any purchaser-specified inspection or test documents included? |
Not every project requires the same documentation. The purchase order should define the certificate type, acceptance criteria and any third-party or project-specific requirements before production or shipment.
RFQ Checklist for ERNiCrMo-4 Welding Wire or Rod
A concise RFQ can use the following format:
| Item | Information to provide |
|---|---|
| Classification | ERNiCrMo-4 |
| Standard | AWS A5.14/A5.14M and the required edition |
| Welding process | Process stated in the approved WPS |
| Form | Straight rod or spooled wire |
| Size | Required diameter; rod length or spool details |
| Quantity | Required weight or package quantity |
| Base material | Alloy grade and product form on each side of the joint |
| Application | Similar-metal joint, dissimilar joint or overlay, subject to engineering review |
| Certification | Required certificate and chemical or traceability fields |
| Packaging and marking | Project-specific protection, label and lot-marking requirements |
| Delivery destination | Country, port or delivery address for quotation |
| Technical documents | WPS/PQR or project specification reference, where applicable |
Example RFQ wording:
Please quote ERNiCrMo-4 bare filler metal to AWS A5.14/A5.14M [required edition], for [welding process], in [rod or wire form], diameter [value], package [requirement] and quantity [value]. The quotation should confirm lot traceability, package marking and the requested chemical and certificate documentation. Final use is subject to the purchaser’s approved WPS and project specification.
Common Purchasing Errors
1. Writing Only “C-276 Wire”
C-276 identifies the alloy family, but it does not fully define the filler-metal classification, form, process or package. State ERNiCrMo-4 when that is the approved bare filler classification.
2. Confusing ERNiCrMo-4 with ENiCrMo-4
ERNiCrMo-4 refers to bare wire or rod under AWS A5.14/A5.14M. ENiCrMo-4 refers to a covered electrode under AWS A5.11/A5.11M. They are not interchangeable purchase descriptions.
3. Leaving the Standard Edition Unspecified
A current catalog page and an older project specification may reference different editions. The purchaser should identify the edition required by the contract or engineering document.
4. Assuming the Classification Approves the Joint
The classification describes the filler metal. It does not replace procedure qualification, code compliance or engineering review for a particular base-metal combination and service condition.
5. Requesting Documents After the Order
Certificate, traceability, inspection and marking requirements are easiest to manage when included in the RFQ and purchase order.
Frequently Asked Questions
Is ERNiCrMo-4 the same as Alloy C-276?
No. ERNiCrMo-4 is a bare filler-metal classification. Alloy C-276, commonly identified as UNS N10276, is a base-alloy designation. ERNiCrMo-4 is commonly associated with welding C-276, but the terms do not describe the same product document.
Is ERNiCrMo-4 the same as ENiCrMo-4?
No. ERNiCrMo-4 is a bare electrode or rod classification under AWS A5.14/A5.14M. ENiCrMo-4 is a covered electrode classification under AWS A5.11/A5.11M.
Can ERNiCrMo-4 be used for dissimilar-metal welding?
Possible applications must be evaluated against the exact base materials, service conditions, governing code and qualified procedure. The classification name alone is not sufficient approval for a dissimilar joint.
Which details should be sent for a quotation?
Send the classification, standard edition, process, form, diameter, rod length or spool requirement, quantity, certification requirements, destination and the relevant WPS or project specification reference.
Request a Technical and Commercial Review
To prepare an accurate quotation, provide the required form, diameter, quantity, package, certificate requirements and delivery destination. If the filler metal is being considered for a special or dissimilar joint, include the base-material grades and applicable qualified procedure reference.
Post time: Oct-28-2026