IABCO Specialist Materials

Steels continue to be developed to accommodate the new demands and requirements of the Power Generating, Petrochemical, Off-shore, Gas and Oil Transmission Industries. IABCO work alongside their clients developing Welding Wires to parallel these steels, and investing in casts to enable quantities of Welding Wire consumables to be supplied at an early stage. Our analyses are frequently copied but seldom bettered.

These special welding wires are typically required for the most demanding and critical applications. We have available to us a facility for producing these small controlled melts, for example products for welding P91, P92, T23 and FV520.

A number of our now standard products started out as a ‘specials’ and over time became standard commercial grades.

Should you have an enquiry for an unusual or new type analysis, send us an enquiry and we will be happy to review.

New Product - IAB Co. ER2594 Wire

Description

IAB Co. ER2594 is a super duplex stainless steel wire based on the 25%Cr-3.5%Mo-9%Ni chemistry with additions of Cu, W and N. The addition of W and N provides increased resistance to pitting corrosion and the wire is supplied with a PREN value of ≥40. The as deposited weld metal microstructure consists of a mixture of austenite and ferrite with a ferrite content typically in the range 35-65% dependent upon heat input and cooling rates. The wire is suitable for use with the GTAW, GMAW and SAW welding processes. The resultant weld deposit exhibits high levels of strength in combination with good toughness down to -50ºC.

Applications

The wire is widely used for the manufacture of oil and gas production equipment for process pipework, risers, manifolds, pressure vessels pumps and valves. Other applications include chemical processing and desalination equipment.

The wire is used for welding super duplex stainless steels and can also be used for welding super martensitic stainless steels. Typical steel grades include:

Sandvik 2507
UNS S32750, UNS S32760
Forgings: ASTM A182 F53, F55
Castings: ASTM A995 Gr. 5A (UNS J93404), Gr. 6A (UNS J93380)
ASTM A890 Gr. 5A (UNS J93404), Gr. 6A (UNS J93380)

Classification

AWS A5.9 ER2594
ASME SFA5.9 ER2594

Wire Analysis (typical wt. %)

PREN = %cr + 3.3(%mo) + 16(%n) = 40.68

Mechanical Properties

Typical mechanical properties for welds completed using the GTAW process are:

Packaging

GTAW (TIG) wire is supplied in 1.60mm, 2.0mm, 2.4mm and 3.2mm diameters in 5kg tubes. Other sizes are available subject to special order. GMAW (MIG) wire is available in 0.9mm, 1.0mm & 1.20mm on 15kg coils with other sizes available to special order. Submerged arc wire is available to special order in the sizes 1.60mm, 2.00mm and 2.4mm.

Storage and Handling

The wire should be stored in a dry room protected from moisture and other contamination.