ER310 Welding Wire
ER310 welding wire is an austenitic stainless steel filler metal classified under AWS A5.9, with nominal 25Cr-20Ni chemistry and good oxidation resistance at elevated temperatures. It is commonly used for welding compatible heat-resistant austenitic stainless steels, including Type 310 and 310S, in furnace components, heat-treatment fixtures, kiln equipment, and other high-temperature applications. Metracore supplies COREWELD 310, its ER310 filler metal, in MIG wire and TIG rod forms, subject to applicable product certification and available sizes. Final filler selection depends on the base-metal grade, service temperature, welding procedure, and project specification.
The COREWELD 310 datasheet lists technical specifications, chemical composition, mechanical properties, and available sizes for ER310 welding wire.
The COREWELD 312 datasheet sets out technical specifications, chemical composition, mechanical properties, and available sizes for ER312 welding wire.
What is ER310 Welding Wire?
AWS A5.9 classifies ER310 as a 25% chromium, 20% nickel austenitic stainless steel filler metal. Chromium supplies oxidation resistance; nickel stabilises the austenite phase, so the weld keeps its ductility at temperatures where ferritic grades turn brittle. Fabricators specify it for welding compatible Type 310 components in furnace baskets, radiant tubes, and kiln hardware exposed to continuous heat. Suitability isn’t automatic across every high-temperature job. The correct filler metal still depends on base material, service temperature, welding procedure, and the project specification.
Benefits of COREWELD 310 Filler Metal
Our 310 filler metal provides outstanding high-temperature stability, thermal fatigue resistance and long-term structural integrity for the most demanding industrial fabrication applications.
- Stable austenitic structure at extreme temperatures where slimmer stainless filler alloys deteriorate
- Steady scaling resistance resists rough high heat exposure without early surface oxidation
- Suitable for heat-resistant austenitic stainless steel applications where the specified welding procedure requires ER310.
- Refined alloy composition retains mechanical strength and ductility under sustained high temperature operation
- Reliable weld pool control enables clean multi-pass deposition on heavy-section heat-treating equipment
Technical Specifications of COREWELD 310
COREWELD 312 ER312 welding wire is supplied to the AWS A5.9 ER312 classification and is available as continuous MIG wire or ER312 filler rod, subject to product form and size.
| Specification | Details |
| Brand | COREWELD 310 |
| Product Name | ER310 Welding Wire |
| AWS Classification | ER310 |
| Material Type | Austenitic Stainless Steel Filler Metal |
| Main Alloying Elements | Chromium (Cr) and Nickel (Ni) |
| Welding Processes | GMAW, GTAW, and SAW (MIG, TIG, and Submerged Arc Welding) |
| Applicable Standard | Certified to AWS A5.9 and ASME SFA A5.9 |
| Available Wire Diameters | GMAW: 0.030 in (0.80 mm), 0.035 in (0.90 mm), 0.045 in (1.20 mm), 1/16 in (1.60 mm) GTAW: 0.035 in (0.90 mm), 0.045 in (1.20 mm), 1/16 in (1.60 mm), 3/32 in (2.40 mm) SAW: 3/32 in (2.40 mm), 1/8 in (3.20 mm), 5/32 in (4.00 mm), 3/16 in (4.80 mm) |
Chemical Composition ER310 Welding Wire
| Element | Composition |
| Carbon (C) | 0.08-0.15% (typical AWS A5.9 range) |
| Chromium (Cr) | 25.0-28.0% (typical AWS A5.9 range) |
| Nickel (Ni) | 20.0-22.5% (typical AWS A5.9 range) |
| Manganese (Mn) | 1.0-2.5% (typical AWS A5.9 range) |
| Silicon (Si) | 0.30-0.65% (typical AWS A5.9 range) |
| Phosphorus (P) | 0.03% max |
| Sulfur (S) | 0.03% max |
Mechanical Properties of ER310 Weld Metal
| Property | Value |
| Tensile Strength | 86,000 psi (Typical for MIG using Argon + 2% O2 as the shielding gas) |
| Yield Strength | 57,000 psi (Typical for MIG using Argon + 2% O2 as the shielding gas) |
| Elongation | 43% (Typical for MIG using Argon + 2% O2 as the shielding gas) |
Equivalent Grades of ER310 Welding Wire
| Standard | Designation |
| AWS / ASME | ER310 (AWS A5.9 / SFA-5.9) |
| Compatible Base Metal (UNS) | S31000 / S31008 |
Applications of ER310 TIG Rod
- Furnace baskets, muffles, and radiant tube assemblies
- Heat-treatment fixtures exposed to repeated thermal cycling
- Kiln car components and refractory anchor welding
- Combustion chamber liners in process heaters
- Repair welding of compatible 310-grade components
- Overlay work requiring oxidation resistance at elevated temperature
Manufacturing Process of ER310 Welding Wire
The ER310 billet is melted to the AWS A5.9 chemistry target before hot working into rod.
- Melting and alloying to the target chromium-nickel range
- Hot rolling into intermediate rod coil
- Cold drawing to finished diameter
- Straightening, cutting, and spooling or cut-length packing
- In-process checks against AWS A5.9 tolerances
How to Select the Right ER310 Filler Wire
Selecting the right ER310 filler wire starts with confirming the base-metal grade, since compatibility is not automatic across every stainless type.
- Base-metal grade and chemical composition
- Required welding process: TIG or MIG
- Wire or rod diameter and product form
- Operating temperature and service environment
- Applicable welding procedure and project specifications
Confirm base-metal compatibility and review the datasheet before ordering.
Why Choose COREWELD 310?
Our COREWELD 310 gives buyers a documented ER310 filler metal with verified AWS A5.9 / ASME SFA-5.9 classification, rather than an unspecified stainless wire. Diameters, rod lengths, and packaging sit on the official datasheet. Technical support covers base-metal compatibility and procedure questions ahead of an order. Review the datasheet first when evaluating this filler metal for high-temperature fabrication.
ER310 Welding Wire Supply and Technical Support
Enquiries cover confirmed wire diameters, rod lengths, packaging, and bulk order requirements once the welding process and base-metal grade are known. Share the required dimensions, base-metal grade, and process (TIG or MIG) when requesting information, so the right product form can be confirmed against the datasheet.
Products
FAQ's
What is ER310 Welding Wire used for?
It welds compatible Type 310 and 310S components in furnace, kiln, and other high-temperature work.
What is the difference between ER310 Filler Wire and ER310 TIG rod?
The filler wire feeds continuously through a MIG gun; the TIG rod is cut-length and fed manually. Chemistry is identical.
Which Stainless Steel grades can be welded using ER310?
ER310 is commonly used with compatible heat-resistant austenitic stainless steels of the 25Cr-20Ni type, including Type 310 and 310S. Final filler selection should follow the WPS, base-metal specification, and project requirements.
Is ER310 Welding Wire suitable for high-temperature applications?
Yes. ER310 is designed for heat-resistant austenitic stainless steel welding and provides good oxidation resistance at elevated temperatures. Final suitability depends on the base metal, service conditions, and approved welding procedure.
What sizes are available for COREWELD 310?
Confirm wire diameters, rod lengths, and packaging from the current datasheet.
Which standard applies to ER310 Welding Wire?
AWS A5.9 / ASME SFA-5.9, subject to certification on the product datasheet.