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Brand: Selectarc
Selectarc UP EB3 EB3R 2.25Cr-1Mo Submerged Arc Wire
Description
2.25Cr-1Mo wire with restricted trace elements
The Selectarc UP EB3 is a chromium-molybdenum solid wire for submerged arc welding of creep-resisting steels with 2.25% Cr and 1% Mo. It is classified AWS A5.23 EB3R and ISO 24598-A S S CrMo2, and is rated by Selectarc for service temperatures up to 600 °C with a good bead appearance.
The R suffix denotes restricted residual elements. The data sheet limits phosphorus and sulphur to 0.010% and arsenic, tin and antimony to 0.005% each, the elements that drive temper embrittlement in Cr-Mo welds held for long periods at operating temperature. Main applications named are the petrochemical and chemical industries.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / product | Selectarc / UP EB3 |
| Process | SAW (submerged arc) |
| AWS classification | A5.23 EB3R |
| ISO classification | 24598-A S S CrMo2 |
| Wire composition, min–max % | C 0.08–0.15, Si 0.05–0.25, Mn 0.40–0.70, Cr 2.25–2.8, Ni max 0.3, Mo 0.90–1.10, Cu max 0.15, Nb max 0.01, V max 0.03, P max 0.010, S max 0.010, As, Sn, Sb max 0.005 each |
| Typical wire composition, % | C 0.11, Si 0.15, Mn 0.60, Cr 2.5, Ni 0.03, Mo 1.0, Cu 0.10 |
| Parameters, 2.4 mm | 200–400 A, 25–30 V, stick-out 18 mm, 40–60 cm/min |
| Parameters, 3.2 mm | 300–500 A, 28–32 V, stick-out 20 mm, 40–60 cm/min |
| Parameters, 4.0 mm | 500–700 A, 30–35 V, stick-out 22 mm, 50–60 cm/min |
| Current type | AC or DC electrode positive |
| Recommended flux | UP BF10 |
| Maximum service temperature | 600 °C |
P22, F22 and grade 22 plate
Selectarc lists EN 10CrMo9-10, 12CrMo9-10 and the cast grade G-17CrMo9-10, and the ASTM materials A182 F22 forgings, A199 and A200 T21 / T22 tube, A213 T22, A217 WC9 castings, A234 WP22 fittings, A335 P22 pipe and A387 Gr 21 and 22 plate.
2.25Cr-1Mo is a workhorse alloy for hydrotreater and hydrocracker reactors, high-temperature hydrogen piping, heater tubes and steam lines. Thick-walled reactor shells and nozzles are typical submerged arc applications, and the restricted trace element levels of an R-grade wire support the low temper-embrittlement factors that refinery specifications often impose on weld metal, frequently expressed through the Bruscato X-factor.
Welding and heat-treatment considerations
Cr-Mo deposits are hardenable and require preheat, controlled interpass temperature and post-weld heat treatment as defined by the governing code and qualified procedure. Typical industry values for 2.25Cr-1Mo are a preheat of around 150 to 200 °C and PWHT in the range of about 680 to 720 °C, but these are general guidance only; always follow the approved WPS.
The final weld metal analysis and toughness depend on the flux, so qualify UP EB3 with UP BF10 or another approved flux. Where step-cooling tests are specified, confirm that the qualified combination has been tested accordingly. Keep the flux dry, and avoid excessive heat input, which coarsens the microstructure and lowers impact values after PWHT.
Hydrogen-service equipment adds further checks, such as hardness limits on weld and heat-affected zone and, for some reactors, dehydrogenation heat treatment before cooling to ambient. Agree these requirements with the end user before qualification so that the wire and flux lot used in the test matches the production supply.
Documents and quotation
The Selectarc UP EB3 data sheet can be downloaded from this page. Browse more wires in our SAW Wire category.
For a quotation, send diameter, packaging, quantity and certificate requirements.
Datasheets & Documents
- Datasheet Selectarc UP EB3 technical data sheet (EN) Download
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About brand
Selectarc is a French manufacturer of welding and brazing filler metals, headquartered in Grandvillars, France. Its welding activity began in 1952 with Selectarc Industrie, a plant making covered electrodes, and the business is the welding and brazing division of the family group Viellard Migeon & Compagnie. In 2025 Framatome took a 40% stake in the company.
Selectarc welding and brazing products
The welding range covers covered electrodes for carbon, low-alloy, stainless and nickel-base steels, MIG and TIG wires, flux-cored wires and hardfacing products, with brazing alloys made at the former Reboud-Roche foundry. Selectarc lists the nuclear, defence and aerospace industries among its key markets, and welding production is concentrated at its Grandvillars site, which also houses the research laboratory.
Ordering Selectarc filler metals: what we need
Give the product name, for example Selectarc Ni625, and the AWS or ISO classification in your procedure, the diameter and length, and the quantity. Seven Star LLC, an independent supplier in Muscat, checks the grade against the Selectarc technical data sheet and can provide the data sheet and the certificates issued with the order on request.
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Frequently Asked Questions
What is the classification of Selectarc UP EB3?
AWS A5.23 EB3R and ISO 24598-A S S CrMo2.
What does the R suffix mean?
In AWS A5.23 the R designates restricted levels of tramp elements for step-cooling embrittlement resistance; the sheet limits As, Sn and Sb to 0.005% max each.
Which steels does it weld?
2.25Cr-1Mo grades such as A335 P22, A182 F22, A387 Gr 22 and 10CrMo9-10.
Which flux is listed?
UP BF10.
What is the maximum service temperature?
Selectarc states up to 600 °C.
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