Ador Tigfil 90S-B3 ER90S-B3 Chrome-Moly TIG Welding Rod

Overview

Ador Tigfil 90S-B3 is a gas tungsten arc welding rod for 2.25 percent chromium, 1 percent molybdenum steels, made by Ador Welding Limited and classified as AWS A/SFA 5.28 ER90S-B3, EN ISO 21952-B W 62 I1 2C1M and IS 6419 SLA-4-I-561. Supplied as straight 1000 mm cut lengths, it is the filler a welder reaches for when the root and hot pass on a P22 line must be sound, fully fused and free of inclusions before the heavier fill passes go in. The manufacturer data sheet prints IBR and CE approvals for this rod, which is relevant to contractors working on boiler-code pressure parts.

Seven Star LLC supplies the Ador Tigfil 90S-B3 from Muscat to fabrication shops, maintenance contractors and plant owners across Oman and the GCC. The official one-page datasheet is attached here so that QA/QC staff can match the classification, typical chemistry and post weld heat treated properties to their WPS before material is released to site.

Role of TIG Filler in Chrome-Moly Piping

As general welding practice, the root pass on high-temperature alloy pipe is usually made by TIG because the process gives precise heat input, a clean argon-shielded puddle and good control of internal bead profile. In a 2.25Cr-1Mo system any lack of fusion or oxidised root can become the start of a creep or fatigue crack years later, so the filler rod must match the base metal and be clean. The Ador Tigfil 90S-B3 carries a typical bare wire analysis of 0.09 C, 0.6 Mn, 0.5 Si, 2.45 Cr and 0.95 Mo, giving a deposit that matches P22 and Grade 22 steels.

Chrome-moly deposits harden on cooling, which is why preheat, interpass control and PWHT are normally specified. Ador quotes its tensile values after 690°C for one hour, and its creep data from the same heat treated condition. The exact thermal cycle on a real job must come from the qualified procedure and the applicable code, not from the datasheet alone.

A further general point is cleanliness. Rods should be handled with clean gloves, kept in their tubes until use and wiped if dust or oil is present, because contamination on a chrome-moly root can show up later as porosity on radiographs. Back purging with argon is also widely used on these alloys to protect the inside of the root from heavy oxidation.

Engineering Design of the Ador Tigfil 90S-B3

Each rod is copper coated, and Ador describes the coating as uniform. Three diameters are listed: 1.6 x 1000 mm, 2.0 x 1000 mm and 2.4 x 1000 mm. All are packed in 20 kg cartons holding four plastic tubes of 5 kg, which keeps rods straight and protected from moisture and handling damage on a busy site. The rod is used on DCEN (electrode negative) in all positions with pure argon shielding at 10 to 15 litres per minute.

The high-temperature performance of the Ador Tigfil 90S-B3 is backed by published creep test figures. After PWHT at 690°C for one hour, Ador records 0.92 percent strain after 1000 hours at 550°C and 140 MPa stress, and 1.28 percent strain after 1000 hours at 600°C and 80 MPa. Those numbers sit next to a typical ultimate tensile strength of 680 MPa, a 0.2 percent proof stress of 600 MPa and 20 percent elongation.

Key Features

According to the official data sheet, the Ador Tigfil 90S-B3 offers the following.

• Copper-coated low alloy steel TIG rod with uniform coating and straight 1000 mm lengths.
• Typical 2.25Cr-1Mo weld deposit for matching creep resistant steels.
• Deposits notch-free welds with excellent mechanical properties.
• Strength and toughness after PWHT described by Ador as superior.
• Radiographic quality welds for inspected piping and pressure equipment.
• IBR and CE approvals printed on the datasheet.
• Creep test data published for 550°C and 600°C.
• Moisture-protective packing of four 5 kg plastic tubes per 20 kg carton.

Industrial Applications

The manufacturer lists welding of 2.25Cr-0.5Mo and 2.25Cr-1Mo creep resistant steels, joining of ASTM A335 P22 pipe and A387 Grade 22 plate, P5A materials, Cr-Mo and Cr-Mo-V bearing steels for high temperature use, and the German grades 12CrMo9-10 and 10CrSiMoV7. Typical locations are refineries, petrochemical units and fertilizer plants. In Oman, that includes hydroprocessing and reformer furnace piping, hot oil circuits and steam distribution in the industrial zones at Sohar, Duqm and Sur. Small-bore instrument tapping points, drains and vents on these systems are frequently welded entirely with the Ador Tigfil 90S-B3 because TIG gives the control needed on thin walls.

Boiler and heat recovery steam generator work is another major area. Tube-to-header joints and steam lines in power and desalination plants are typically TIG rooted, and an IBR-approved rod can simplify documentation for boiler contractors. Seven Star LLC supplies the Ador Tigfil 90S-B3 for both new construction and shutdown maintenance, and can supply companion chrome-moly MIG and flux-cored wires so that a single P22 joint can be completed with a matching consumable set.

Technical Specifications

All values below are taken from the official Ador Tigfil 90S-B3 data sheet.

Related Welding Products

Many shops pair a TIG root with a MIG fill using a multi-process machine such as the ESAB Rebel EMP 285ic. For carbon steel attachments there is the SuperArc L-59 solid wire, and for long shop seams the LongTeng EL8 submerged arc wire. See the full range of TIG welding wire.

Call To Action

Request a quotation for the Ador Tigfil 90S-B3 by telling us the rod diameter, number of 20 kg cartons and the site in Oman or the GCC where delivery is needed. The Ador Tigfil 90S-B3 datasheet can be downloaded from this page, and our Muscat engineers can help you check the rod against your WPS, PQR and base material certificates.