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Brand: Böhler Welding
Böhler UV 400 Aluminate-Basic Submerged Arc Flux
Description
Aluminate-basic all-round SAW flux for structural, boiler and pipe steels
Böhler UV 400 is an agglomerated flux of the aluminate-basic type for joining and surfacing applications with general-purpose structural steels, fine-grained structural steels, boiler steels and pipe steels. Böhler Welding characterises it by low silicon and moderate manganese pick-up. It runs on DC and AC, and the good welding characteristics together with the technological properties of the weld metal produced with different wires permit universal use. That makes UV 400 a sensible stock flux for workshops that weld several steel grades with one or two flux types.
Technical specifications
| Parameter | Specification |
|---|---|
| Flux type | Agglomerated, aluminate-basic, for low and medium alloy wires |
| Classification EN ISO 14174 | S A AB 1 67 AC H5 |
| Polarity | DC / AC |
| Basicity index (Boniszewski) | 2.3 mol %, 1.7 wt % |
| Grain size (EN ISO 14174) | 3 to 20 (0.3 to 2.0 mm) |
| Flux consumption | 1.5 lbs flux per lb of wire |
| Redrying | 600 °F ± 25 (about 315 °C) for at least 2 hours |
| Diffusible hydrogen (ISO 3690) | Max 5 ml per 100 g deposited weld metal (as produced and re-dried) |
| Composition, wt % | SiO2 + TiO2 20; CaO + MgO 30; Al2O3 + MnO 26; CaF2 16 |
| Approval as shown on the Böhler webshop | DNV-GL |
Matching wires and use
In Böhler’s wire data sheets UV 400 is listed as a recommended flux for
(EM12K) and (EH12K), the standard C-Mn wires for general structural steel. Böhler also names it for several seamless flux-cored SAW wires. Aluminate-basic fluxes of this type are generally chosen when a smooth bead and good slag release are wanted across a broad range of plate thicknesses, with the lower silicon pick-up helping weld metal toughness. For the highest toughness at sub-zero temperature or for thick, high-strength sections, a more basic fluoride flux such as is usually considered.| Related Böhler flux | EN ISO 14174 class | Intended for |
|---|---|---|
| UV 418 TT | S A FB 1 55 AC H5 | Fine-grained steels with high toughness demand |
| UV 420 TTR-W | S A FB 1 65 AC H5 | Cr-Mo creep-resistant wires on AC |
| Marathon 805 | S A AF 2 DC | Stainless wires and cladding |
Storage and flux handling
As with any agglomerated flux, keep the bags sealed and dry until use, redry flux that has been exposed, and avoid mixing different fluxes in the same hopper. Flux depth in the joint, travel speed and stick-out also affect bead shape and porosity, so set them from the procedure qualification record and adjust only within the qualified range. Where recycled flux is used, remove fines and contaminants so that the grain size distribution stays close to the 3 to 20 range given on the data sheet.
Documents and quotation
The Böhler Welding product data sheet for UV 400 (US edition, 04/2021) is attached. Confirm wire, polarity, plate grade and certificate needs before ordering. More products are in the Submerged Arc Fluxes category. For a quotation, send the quantity and packaging you need.
Datasheets & Documents
- Datasheet Böhler Welding UV 400 product data sheet (US edition, 04/2021) Download
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About brand
Böhler Welding is the welding consumables brand of voestalpine Böhler Welding, part of the voestalpine group, with a portfolio that covers stick electrodes, TIG rods, solid wires, gas-shielded and self-shielded flux-cored wires and submerged-arc wires and fluxes. The company states more than 100 years of experience. Seven Star LLC, an independent supplier in Muscat, lists Böhler Welding consumables and welding machines, including pipeline electrodes, and sources Böhler Welding consumables for fabricators and pipeline contractors.
Böhler Welding product groups
Beyond the consumables above, Böhler Welding lists strip cladding, wire arc additive manufacturing, metal powders, arc spraying cored wires, ceramic weld backing, brazing consumables and welding automation such as orbital welding and collaborative robots. The pipeline range includes cellulosic FOX CEL electrodes and basic vertical-down FOX BVD electrodes for large-diameter line pipe.
Ordering Böhler Welding consumables: what we need
Give the product name, the AWS or EN classification, the diameter and length, and the packaging you need. For pipeline electrodes also state the pipe grade, wall thickness, welding position and whether sour-service test values are required, because the Böhler Welding data sheets note that some test values are available on request.
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Frequently Asked Questions
What is the classification of UV 400?
EN ISO 14174 S A AB 1 67 AC H5, aluminate-basic.
Which steels can be welded with it?
General structural, fine-grained structural, boiler and pipe steels.
Can it be used on AC?
Yes, it runs on DC and AC.
What are the silicon and manganese characteristics?
Low silicon pick-up and moderate manganese pick-up, according to the data sheet.
What is the redrying instruction?
600 °F ± 25 for at least 2 hours.
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