ER385 Filler Wire Manufacturer, Supplier
What Is ER385 Filler Wire?
ER385 filler wire is an austenitic stainless steel welding filler metal for joints exposed to acids and other aggressive chemicals. Welders commonly pair it with UNS N08904 (904L) stainless steel and similar corrosion-resistant alloys, subject to the base material and welding procedure.
COREWELD 385 supplies this filler metal for applications where weld integrity and corrosion resistance both matter. Confirm the filler against the base metal grade, the service environment, and the approved welding procedure before ordering.
ER385 TIG wire serves TIG (GTAW) applications that demand controlled filler metal placement and consistent weld quality. TIG welding process is suitable for the thinner sections, root passes and precision fabrication when the joint has been prepared correctly following the right parameters.
Confirm the required diameter, base material compatibility, shielding gas, welding position and procedure requirements before selecting ER385 TIG wire
ER385 Welding Wire Specifications
The table below highlights the detailed technical specifications, standards, and product options for COREWELD 385 ER385 filler wire, designed for TIG welding applications in high-corrosion environments.
| Parameter | Details |
| Product Name | ER385 Filler Wire |
| Brand | COREWELD 385 |
| AWS Classification | ER385 |
| Material Type | Austenitic stainless steel filler metal |
| Common Base Material | 904L stainless steel and compatible alloys, subject to procedure |
| Welding Process | TIG (GTAW) |
| Product Form | Straight TIG filler rod / cut lengths |
| Wire Diameter | AWS A5.9 / ASME SFA-5.9; equivalent EN ISO 14343-A classification: S 20 25 5 Cu L |
| Packaging | Provided on request |
| Applicable Standard | AWS A5.9 / ASME SFA-5.9; equivalent EN ISO 14343-A classification: S 20 25 5 Cu L |
ER385 Chemical Composition
| Element | Percentage (%) |
| Chromium (Cr) | 19.50–21.50 |
| Nickel (Ni) | 24.00–26.00 |
| Molybdenum (Mo) | 4.20–5.20 |
| Copper (Cu) | 1.20–2.00 |
| Carbon (C) | 0.025 max. |
Mechanical Properties of ER385 Weld Metal
| Property | Value |
| Tensile Strength | 510 MPa minimum (74,000 psi minimum); typical all-weld-metal value around 600 MPa / 87,000 psi |
| Yield Strength | 320 MPa minimum (46,400 psi minimum, 0.2% offset); typical around 400 – 410 MPa / 58,000 – 59,500 psi |
| Elongation | 25% minimum; typical around 35 – 37% |
| Test Condition | Stated with the applicable test standard |
Equivalent Grades of ER385 Filler Wire
| Standard | Designation |
| AWS A5.9 | ER385 |
| UNS Number | S38540 |
| ISO 14343 | W 20 25 5 Cu L |
| Matching Base Metal | 904L, UNS N08904 |
| EN Number of Base Metal | 1.4539 |
Key Features of COREWELD 385 Filler Wire
- ER385 welding wire supports corrosion-resistant stainless steel welding.
- High-alloy weld metal chemistry with chromium, nickel, and molybdenum.
- Copper content suits specific applications in acidic environments.
- Supplied for TIG welding in the product forms and diameters offered.
- Supports weld integrity and service performance when used with a qualified welding procedure.
Applications of ER385 Welding Wire
- Chemical processing equipment
- Sulfuric acid handling systems
- Phosphoric acid production equipment
- Heat exchangers and condensers
- Pickling and plating tanks
- Flue gas desulfurization units
- Pulp and paper processing equipment
- Seawater cooling and offshore piping
- Pharmaceutical process vessels
Manufacturing Process of ER385 Welding Wire
- Raw material selection with verified alloy inputs
- Melting and chemistry adjustment
- Chemical analysis of the melt
- Hot rolling into wire rod
- Annealing and surface cleaning
- Cold drawing to the required diameter
- Straightening and cutting for TIG rod lengths
- Dimensional and visual inspection
- Batch marking, packaging and certificate issuance
Benefits of Choosing the Correct ER385 Filler Wire
- Corrosion resistance: The alloy system targets demanding corrosion-resistant applications.
- Material compatibility: Suits 904L stainless steel and related compatible materials.
- Controlled weld placement: TIG product forms support precision welding.
- Application matching: Select the filler by base metal and operating environment.
- Weld quality: Proper storage, preparation and qualified procedures produce consistent results.
Why Choose COREWELD 385 ER385 Filler Wire?
COREWELD 385 offers the ER385 filler wire option for compatible stainless steel welding applications to the customer. When evaluating it, ensure you verify its classification, chemical composition, mechanical properties, the diameters available, packaging and documentation.
Base the selection on the base material, service conditions and welding procedure rather than classification alone. Request the latest datasheet and product documentation to verify suitability for your project.
How to Select the Right ER385 Welding Wire
Check these points before ordering:
- Base metal: Confirm whether the component is 904L or another compatible alloy.
- Operating environment: Identify the chemicals, concentration, temperature and exposure conditions.
- Welding process: Confirm whether the job requires TIG wire or another approved product form.
- Wire diameter: Match the diameter to the joint design and welding procedure.
- Documentation: Review the datasheet, batch documentation and project requirements.
For critical service, ask a qualified welding engineer or materials specialist to review the filler metal selection.
Products
FAQ's
What is ER385 filler wire used for?
It joins 904L stainless steel and similar corrosion-resistant alloys in equipment that handles acids and aggressive chemicals.
Is ER385 welding wire suitable for 904L stainless steel?
Yes, ER385 is commonly associated with 904L and compatible alloys. Confirm the base metal, service environment, and welding procedure before use.
Is ER385 filler wire available for TIG welding?
COREWELD 385 supplies ER385 as TIG filler wire and rod. Other product forms depend on current availability, so confirm them with the sales team.
What makes ER385 different from standard stainless steel filler wire?
ER385 carries a richer mix of chromium, nickel, molybdenum, and copper. That chemistry targets acidic environments where standard stainless fillers offer less resistance.
How can I confirm the chemical composition of COREWELD 385?
Check the datasheet and the batch test certificate. Both state the verified composition, and the sales team can send it on request.
How do I choose the right ER385 wire diameter?
Match the diameter to the joint design, section thickness, and approved welding procedure. Thinner sections and root passes requires smaller diameters.