ER320LR TIG Wire Manufacturer, Supplier
What is ER320LR TIG Wire?
ER320LR is an AWS A5.9 classification for stainless steel filler metal. The ER prefix marks a bare electrode or rod, and LR stands for low residuals. Carbon, silicon, phosphorus and sulfur sit at lower limits than in conventional ER320, while manganese and niobium stay within narrow ranges. Those controls reduce hot cracking and microfissuring. Fully austenitic weld metal solidifies without ferrite to absorb impurities, so low residuals matter. Fabricators use ER320LR welding wire on Type 320 stainless steel and alloys of similar composition. Filler metal selection depends on the base material, the corrosion environment and the approved welding procedure.
Technical Specifications of COREWELD 320LR
The specifications below outline the core product details and applicable industry standards for COREWELD 320LR (ER320LR TIG Wire). Verify every parameter below against the official COREWELD 320LR datasheet to ensure correct diameter, packaging and shielding gas selection before ordering.
Classification
AWS A5.9 / ASME SFA 5.9, ER320LR
Diameter
0.80-4.80 mm (0.30-3/16 in)
Welding Process
TIG (GTAW)
Material Type
Low residual austenitic stainless steel filler metal
Reach out to Metracore Alloys Private Limited for reliable ER320LR TIG Wire Solutions
Chemical Composition and Mechanical Properties of ER320LR
Chromium builds the passive oxide film that protects the surface, while nickel keeps the structure fully austenitic. Niobium is also added to combine with carbon, limiting intergranular attack. Beyond its precise chemical balance, ER320LR delivers excellent mechanical performance, offering high tensile strength and robust ductility. This ensures reliable crack resistance and maintains structural integrity even in highly demanding, corrosive environments.
Chemical Composition of ER320LR
| Element | Composition (%) |
| Carbon (C) | 0.025 maximum |
| Chromium (Cr) | 19.0 to 21.0 |
| Nickel (Ni) | 32.0 to 36.0 |
| Molybdenum (Mo) | 2.0 to 3.0 |
| Manganese (Mn) | 1.50 to 2.00 |
| Silicon (Si) | 0.15 maximum |
| Copper (Cu) | 3.0 to 4.0 |
| Phosphorus (P) | 0.015 maximum |
| Sulfur (S) | 0.020 maximum |
| Niobium (Nb) | 8 times C minimum to 0.40 maximum |
Values show AWS A5.9 limits. Confirm against the COREWELD datasheet.
Mechanical Properties of ER320LR Weld Metal
| Property | Reference Value |
| Tensile Strength | 590 MPa (86,000 psi) |
| Yield Strength | 400 MPa (57,500 psi) |
| Elongation | 35 percent |
AWS A5.9 sets no mechanical requirements for bare ER320LR, so these values come from published test data. Results vary with welding procedure and test conditions.
Equivalent Grades of ER320LR
| Standard or System | Designation |
| AWS A5.9 | ER320LR |
| ASME SFA 5.9 | ER320LR |
| UNS filler metal | N08022 |
| UNS base metal | N08020 |
| DIN material number | 2.4660 |
| Common base metal name | Alloy 20, Carpenter 20Cb3 |
Manufacturing Process of ER320LR TIG Wire
Applications of ER320LR TIG Wire
Key Benefits of COREWELD 320LR Filler Metal
Controlled low residual elements define this ER320LR TIG rod. Carbon stays at 0.025% maximum and silicon at 0.15% maximum, against 0.07 and 0.60% in conventional ER320, which reduces hot cracking and microfissuring. Niobium stabilizes the deposit against carbide precipitation. The composition matches Type 320 and Alloy 20 base metals. Corrosion performance in chemical service depends on the base material, the welding procedure and verified technical documentation.
Why Choose COREWELD 320LR TIG Wire?
Buyers evaluating COREWELD 320LR for stainless steel welding should check four points: the AWS ER320LR classification, the technical specifications in the datasheet, the available diameters and packaging, and the technical support available. Download the datasheet to confirm material compatibility, rod dimensions and packing details against your procedure qualification record. Request written confirmation of any certification your project requires.
ER320LR TIG Wire Supply and Technical Support
Send COREWELD an enquiry for ER320LR TIG wire with the base material grade, the chemical service environment, the rod diameter and length, the packaging preference and the welding process. The team reviews bulk requirements against datasheet sizes and packaging, and answers technical questions on filler selection and datasheet values.
Frequently Asked Questions About ER320LR TIG Wire
What is ER320LR TIG wire used for?
It welds Type 320 stainless steel and similar alloys in chemical processing equipment, process piping and heat exchangers.
What does LR mean in ER320LR?
LR stands for low residuals: tighter limits on carbon, silicon, phosphorus and sulfur.
What is the difference between ER320 and ER320LR filler metal?
ER320LR caps carbon at 0.025% and silicon at 0.15%, against 0.07 and 0.60% in ER320.
Which stainless steel grades can be welded using ER320LR?
Type 320 stainless steel, also sold as Alloy 20 (UNS N08020), is the primary match.
What is the chemical composition of ER320LR TIG wire?
Chromium 19.0 to 21.0% and nickel 32.0 to 36.0% form the base. The composition table above lists every limit.
Which standard applies to ER320LR welding wire?
AWS A5.9 and ASME SFA 5.9 cover ER320LR.
Products
Exporter, Manufacturer & Supplier of ER320LR TIG Wire in various material and sizes.