01
Alloy 20 ER320LR Bare Wire
Layer-wound spools and cut lengths of the low-residual bare class.
Request Availability →Alloy 20 Welding Wire
ER320LR welding wire and E320LR electrodes, the low-residual filler that keeps a zero-ferrite weld sound.
Two Low-Residual Classes
ER320LR covers the bare form of this Alloy 20 welding wire, while E320LR covers the covered electrode.
Built for a Zero-Ferrite Deposit
Moreover, the residual limits on this Alloy 20 welding wire keep a fully austenitic weld pool from tearing as it solidifies.
Packed for a Live Shutdown
Furthermore, this welding wire leaves in sealed tubes, spools and electrode tins sized for a turnaround window.
PRODUCT OVERVIEW
About Alloy 20 Welding Wire
Alloy 20 welding wire covers the fillers classified for joining UNS N08020 fabrications. The bare form of this Alloy 20 welding wire runs as ER320LR per AWS A5.9. Its covered electrode runs as E320LR per AWS A5.4.
We supply the welding wire as straight TIG rods, layer-wound MIG spools and sealed electrode tins. The deposit carries the sulfuric acid performance of the parent metal through the joint, and the trace elements that would otherwise stay liquid at the end of the pool are held down to keep the weld sound.
Meanwhile, the base-metal chemistry behind this welding wire sits on our Alloy 20 material page for weld procedure work, and the filler classes above ride on it.
PRODUCT FEATURES
Key Features of Alloy 20 Welding Wire
Alloy 20 welding wire comes out of UNS N08020, the niobium-stabilised nickel-iron-chromium grade whose copper content carries it through sulfuric acid. We supply AWS A5.9 and AWS A5.4 welding wire as bare spooled wire, straight TIG lengths and covered electrodes for acid plant, pickling house liquor and tankhouse duty. Every Alloy 20 welding wire consignment travels with heat-number traceability, EN 10204 3.1 mill test reports and full export documentation.
Alloy 20
Low Residual by Definition
For example, carbon falls to 0.025% and silicon to 0.15% in this welding wire, against 0.07% and 1.00% in the parent metal.
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Niobium Ceiling Cut to 0.40%
Specifically, the ceiling on this welding wire drops from the 1.00% that the older ER320 class allows.
02
Matching Deposit
Moreover, a deposit from this welding wire carries the parent metal sulfuric acid performance into the joint.
03
Tensile Floor on the Electrode
In addition, the A5.4 class sets 520 MPa (75 ksi) with 30% elongation, so this welding wire carries a real minimum.
04
Procedure Work Made Simple
Besides, the electrode class on this welding wire sits at F-Number 4 and A-Number 8 against a P-Number 45 base metal.
05
Dissimilar Work in Scope
Consequently, this welding wire joins stainless and carbon steel without chasing a ferrite number.
06
Sealed Packing
Every pack of this welding wire leaves sealed against moisture, so the surface arrives weld-ready.
07
Heat-Number Traceability
Finally, the paperwork behind this welding wire follows EN 10204 3.1 from spool to spool.
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WHY CHOOSE US
Why Choose Alloy 20
A zero-ferrite deposit will crack during solidification unless the residual elements stay pinned down. Therefore, we settle the class, the diameter and the pack weight of this Alloy 20 welding wire before the offer goes out.
01
Duty Read Before Pricing
We record the acid, its concentration and its temperature for your Alloy 20 welding wire before proposing a delivery state.
02
Certificates Tied to the Heat
Specifically, each welding wire consignment carries EN 10204 3.1 papers, heat numbers and dimensional records.
03
One Route for Welders and Machinists
In addition, this welding wire flows through one process whether your shop welds it into a vessel or turns it on a lathe.
04
Terms Stated in Writing
Quotations for this welding wire name the acid, the section, the finish and the document set rather than leaving them open.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
We balance melt stock for this filler to the nickel-iron-chromium window before anything else happens. Every step behind this Alloy 20 welding wire carries a heat number.
01
Charge Selection
We weigh nickel, chromium and copper, then balance the analysis this Alloy 20 welding wire needs.
02
Melting and Casting
First, we melt and cast the charge for this welding wire into electrode stock under a tight carbon ceiling.
03
Residual Control
Next, we hold carbon, silicon, phosphorus and sulphur down so this welding wire meets the LR limits rather than the older class.
04
Rolling and Drawing
Then, rolling and drawing bring this welding wire down to the ordered filler diameter.
05
Cleaning and Descale
After that, pickling and mechanical cleaning leave this welding wire bright and ready for the arc.
06
Spooling and Cutting
Subsequently, we wind spools and cut straight TIG lengths of this welding wire.
07
Electrode Extrusion
For E320LR, we press the basic covering onto this welding wire core wire.
08
Baking and Release
Finally, we bake and seal the electrodes, then confirm the class of this welding wire on an all-weld-metal test.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
One schedule carries both stock lengths and bespoke heats of Alloy 20 welding wire. Besides, we quote this Alloy 20 welding wire through our bar and rod program.
20,000+ m²
Factory Area
Hot working, annealing, quenching and finishing lines behind the welding wire share this site.
50+
Production Machines
Units for hot working, annealing, quenching and grinding of this welding wire.
600 Tons
Monthly Capacity
Welding wire tonnage across stock lots and bespoke heats.
30+
Technical Engineers
Metallurgists who write the anneal and quench plan that this welding wire follows.
30+ Countries
Export Reach
In addition, sealed export packing sends this welding wire to buyers on five continents.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
Nothing leaves until the heat behind your Alloy 20 welding wire clears our ISO 9001 route. In addition, the checks on this Alloy 20 welding wire follow the requirements the order names.
01
Heat Identification
We match the grade and heat number on this welding wire to your purchase order before anything leaves the yard.
02
Chemistry Verification
Specifically, copper, nickel and niobium in this welding wire go against the B473 table for your lot.
03
Tensile Verification
In addition, every heat of this welding wire carries reported tensile, yield and reduction-of-area values measured against the B473 floor.
04
Quench Record Referenced
The cooling record behind this welding wire travels with its EN 10204 3.1 papers.
PRODUCT FORMS
Available Product Forms
The list below covers the variants we quote for Alloy 20 welding wire from your drawing rather than a stock list. In addition, this list covers the deliveries ordered most often for this Alloy 20 welding wire.
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Alloy 20 Straight TIG Rods
Cut lengths with clean, deburred ends for manual work.
Request Availability →
03
Alloy 20 MIG Spools
Spools sized for automatic and semi-automatic feeding.
Request Availability →
04
Alloy 20 Submerged Arc Wire
Coils for submerged arc runs on heavy sections.
Request Availability →
05
Alloy 20 E320LR Covered Electrode
Basic-coated electrodes for repair and cladding work.
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APPLICATIONS
Engineered For Demanding Industries
A filler earns its place only when the deposit survives the same acid as the vessel. Therefore, the list below sets out the duties this Alloy 20 welding wire covers.
Discuss Your Application →
01
Alloy 20 Dissimilar Joint Fabrication
Joints that bring an austenitic component together with carbon steel.
02
Alloy 20 Acid Vessel Overlay Work
Overlay that puts a corrosion-resistant layer inside a carbon steel shell.
03
Alloy 20 Pickle Tank Repair Welds
Repair welds on tanks that hold spent pickling liquor.
04
Alloy 20 Nozzle Seat Build-Up
Build-up that restores a nozzle seat before a new flange goes on.
05
Alloy 20 Exchanger Tube Repairs
Plug and repair work inside exchangers that run on acid.
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Alloy 20 Reactor Internals Welding
Joints on baffles and supports that sit inside an acid reactor.
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Alloy 20 Acid Line Spool Fabrication
Shop welds on spools that carry acid between process units.
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Alloy 20 Pump Casing Overlay
Overlay on pump casings that wear faster than the impeller.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
ASTM B473 prints one chemistry window for this welding wire, holding nickel between 32.0% and 38.0% and copper between 3.0% and 4.0%. Moreover, niobium plus tantalum in this welding wire has to reach eight times the carbon content.
Meanwhile, the full composition table on the Alloy 20 material page carries every limit behind this welding wire.
Mechanical Properties
All-weld-metal results for the fillers supplied with Alloy 20 welding wire appear below, drawn from the classifications and from published weld test data. Note that AWS sets no tensile floor on the bare class here, so the chemistry and the weld test report carry the release.
| Product (all-weld metal) | AWS Class | Tensile Strength | Elongation |
|---|---|---|---|
| ER320LR bare wire, GTAW deposit | AWS A5.9, UNS N08022 | 590 MPa (86 ksi), typical | 35%, typical |
| E320LR covered electrode, SMAW deposit | AWS A5.4, UNS W88022 | 520 MPa (75 ksi), minimum | 30%, minimum |
| E320LR covered electrode, published range | AWS A5.4, UNS W88022 | 590 MPa (86 ksi), typical | 34%, typical |
- The A5.4 electrode class carries a real tensile floor at 520 MPa (75 ksi) with 30% elongation and no yield requirement, while the A5.9 bare class is classified on chemistry rather than on strength. Therefore, we report the deposit values from the test certificate instead of quoting one guaranteed number for every joint. In addition, the electrode class sits at F-Number 4 and A-Number 8 against a P-Number 45 base metal, which keeps procedure work straightforward.
Physical Properties
The table below identifies the parent metal and both filler deliveries behind this Alloy 20 welding wire.
| Property | Value |
|---|---|
| Parent Metal | UNS N08020, 2.4660 / NiCr20CuMo |
| Bare Filler | ER320LR (AWS A5.9) |
| Bare Filler UNS | N08022 |
| Covered Electrode | E320LR (AWS A5.4) |
| Covered Electrode UNS | W88022 |
| Copper | 3.0–4.0% in the parent metal |
| Niobium plus Tantalum | Eight times carbon, minimum, in the parent metal |
| Carbon Ceiling | 0.025% max. in the bare filler, against 0.07% in the parent metal |
| Silicon Ceiling | 0.15% max. in the bare filler, against 1.00% in the parent metal |
| Niobium Ceiling | 0.40% max. in the bare filler, against 1.00% in the parent metal |
| Ferrite Content | Essentially zero in the deposit, which is why the residual limits matter |
| Strengthening Route | Cold work only, because the grade takes nothing from aging |
Filler Metal Classifications
The table below sets out the deposit side of this welding wire in both of its packaged forms, and it separates what AWS guarantees from what published weld testing shows.
| Product | AWS Class | Chemistry Basis | Typical Strength | Best Suited For |
|---|---|---|---|---|
| Bare wire | ER320LR (A5.9), UNS N08022 | Ni balance, Cr 19.0–21.0%, Mo 2.0–3.0%, Cu 3.0–4.0%, C 0.025% max., Si 0.15% max. | 590 MPa (86 ksi) typical | GTAW primary, GMAW general |
| Covered electrode | E320LR (A5.4), UNS W88022 | The same nickel-iron-chromium analysis under a basic covering | 520 MPa (75 ksi) minimum | SMAW repair and cladding |
Standards
AWS A5.9 carries the bare classification behind this welding wire, issued by the American Welding Society. In addition, AWS A5.4 covers the covered electrode that pairs with this welding wire.
| Standard | Product or Application |
|---|---|
| AWS A5.9 / ASME SFA-5.9 | ER320LR bare wire, UNS N08022, for this base metal |
| AWS A5.4 / ASME SFA-5.4 | E320LR covered electrode, UNS W88022 |
| ASME Section IX | F-Number 4 and A-Number 8 for weld procedure work |
Beyond that, the standards table on the Alloy 20 material page carries the European designations and the flat-product call-outs for this welding wire.
Dimensions
The table below lists the welding wire sizes we ship most often, while the route, the document and the lot size decide what else is possible. Please confirm your own size, section and length with the inquiry.
| Product Form | Typical Supply | Length |
|---|---|---|
| ER320LR Bare Wire | 0.8-4.0 mm dia., UNS N08022 | Spools, coils or cut lengths |
| Straight TIG Rods | 1.6-4.0 mm dia. | 1000 mm cut lengths |
| MIG Spools | 0.8-1.6 mm dia. | Spooled |
| Submerged Arc Wire | 2.4-4.0 mm dia. | Coils |
| E320LR Covered Electrode | 2.4-4.0 mm dia., UNS W88022 | Sealed tins |
| Custom Filler Packing | To your pack weight | Custom |
This deposit solidifies with essentially no ferrite, so the low-melting phosphide and sulphide films that would otherwise stay liquid to the end of the weld pool are the whole problem. The LR limits cut carbon, silicon, phosphorus and sulphur back and drop the niobium ceiling from 1.00% to 0.40%. Therefore, tell us the two materials meeting at the joint and we will fix the class and the diameter together.
Surface Finishes
The surface you order on this welding wire decides how the part feeds, seals and resists attack. Consequently, we settle the condition of this welding wire before the price goes out.
| Surface Condition | Typical Use |
|---|---|
| Clean Bright Rod | Bare ER320LR of this welding wire leaves the draw bench clean and free of lubricant. |
| Straight Cut Lengths | TIG lengths of this welding wire arrive cut and deburred for the root pass. |
| Sealed Spools | Layer-wound spools of this welding wire stay sealed against moisture until the arc starts. |
In contrast, the surface finishes table on the Alloy 20 material page lists the further conditions open to this welding wire.
Related forms from the same heat cover Alloy 20 Wire, Alloy 20 Bright Bar and Alloy 20 Centreless-Ground Rod when your welding wire order needs them.
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
A single coordinator stays with your Alloy 20 welding wire enquiry from the first question to the loading bay. In addition, stock of this Alloy 20 welding wire leaves inside fifteen days, and a freshly annealed heat takes about thirty.
1
Give Us the Duty
Send the acid, its concentration and its temperature together with the size, quantity and standard this welding wire faces.
2
Settle the State
Then we lock the anneal cycle, the delivery condition and the tolerance band on this welding wire.
3
Read the Offer
Pricing for this welding wire comes back by size, quantity and destination port.
4
Sign off the Order
We need your written confirmation of the specification, the terms and the schedule for this welding wire.
5
Book the Witness Points
Next we schedule any third-party inspection or dimensional review of this welding wire before production starts.
6
Ship and Document
This welding wire reaches you with mill papers, a packing list and the certificate set.
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which AWS classification covers the filler for this Alloy 20 welding wire?
ER320LR per AWS A5.9 covers the bare form of this Alloy 20 welding wire, and E320LR per AWS A5.4 covers the covered electrode.
Why does the deposit from this welding wire carry no ferrite?
The analysis is fully austenitic, so the residual limits have to hold down the low-melting films that would otherwise stay liquid at the end of the pool.
How does ER320LR differ from the older ER320 class?
Carbon falls from 0.07% to 0.025%, silicon from 0.60% to 0.15%, phosphorus and sulphur halve, and the niobium ceiling drops to 0.40%.
Which two materials can this welding wire join?
It joins a nickel-iron-chromium component to stainless steel or to carbon steel without leaving a brittle phase in the joint.
Which welding processes suit this welding wire?
GTAW, GMAW, PAW and SMAW all work with this welding wire, and submerged arc suits a flux matched to the deposit.
What is your MOQ for this welding wire?
One sealed pack of this welding wire is enough to cover the diameters a shutdown normally needs.
What are your trade terms for this welding wire?
Trade terms for this welding wire open on FOB, and we add EXW, CIF or DAP once we know the destination port.
What is the lead time for this welding wire?
Stock sizes of this welding wire leave in 7 to 15 days, while custom packing needs longer.
Do you provide EN 10204 3.1 or 3.2 certificates for this welding wire?
EN 10204 3.1 papers follow every batch of this welding wire, and you can book a 3.2 endorsement on the order.
Which information should an enquiry for this welding wire carry?
Send the classification, the diameter, the two parent materials and the quantity so we can price this welding wire.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
We price this Alloy 20 welding wire by classification, diameter and the pack weight your shutdown can use. Send the class, the two parent materials and the quantity to price it.
Your Alloy 20 welding wire inquiry passes through the anneal, the finish and the document scope before any price goes out. We build to the signed sheet, and the full paper set travels with this welding wire.
