DAIKOWS 2594Cu

SAW
  • DUPLEX - SUPERDUPLEX
ZERON 100

Description

Solid superduplex stainless wire rod for welding Zeron® 100 alloy
Superduplex filler metal matching the proprietary Zeron® 100 alloy. The presence of Cu+W in this alloy provides superior resistance to sulphuric and hydrochloric acids when compared to similar alloys without these additions. Offshore applications exploit the high resistance to pitting and stress corrosion cracking in seawater. It is also highly resistant to caustic alkalis and phosphoric acid. Widely used in oil and gas production and process.
Specifications
ISO 14343-A
S 25 9 4 N L
AWS A5.9
ER2594
Shielding
DAIKOFLUX 900-W
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
-

Ferrite

% 30-60

Pren

40.56
Chem. Comp. %
DEFAULT
C
0.02
Mn
0.6
Ni
9.1
Cr
25
N
0.23
P
0.02
S
0.015
Mo
3.6
Si
0.3
Cu
0.6
W
0.65
Mechanical Properties
min
variant
Tensile strength Rm MPa
620
860
Yield strength Rp0.2 MPa
550
650
Elongation A (L0=5d0) %
18
24
Impact Charpy ISO-V
-
40J @ -40°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
Ampere
250A - 420A
Voltage
28V - 32V
Packaging
Ø 2,0÷4,0mm
Packaging Type
K415 spool and drums.
ZERON 100
Description

Application

Zeron® 100 excels in strength and in corrosion and erosion resistance, proving effective in aggressive environments. The Cu+W addition enhances resistance to sulphuric and hydrochloric acids, surpassing alloys without these elements. Notable for its offshore use, it resists pitting and stress-corrosion cracking in seawater and withstands caustic alkalis and phosphoric acid. Its service temperature range is typically -50°C to 280°C, with factors like thermal instability (450°C) and sigma embrittlement influencing the upper limit. Widely applied in oil and gas, it serves in pipework, risers, manifolds, pressure vessels, valves, pumps, desalination plants, and FGD systems. Versatile across mining, chemical, and pharmaceutical industries, Zeron® 100 wires are employed for joining supermartensitic stainless steels, showcasing adaptability across various industrial applications.

Alloy Type

25%Cr ferritic-austenitic superduplex stainless steels matching the proprietary Zeron® 100 alloy.

Microstructure

Austenite-ferrite duplex microstructure in AW or solution annealed condition with an approximate 30- 60% ferrite level, depending on heat cycle conditions.

Materials


EN W.Nr.: 1.4508, 1.4501, 1.4469.
ASTM: A890 6A, A182 F55, A890 5A.
UNS: S32760, J93380, S32750, S32550, S32520, S39274, S32950, J93404.
PROPRIETARY: Zeron 100 (Rolled Alloys) DP3W (Nippon Steel Corporation), 7-Mo Plus (Carpenter), SAF 2507 (Sandvik).

Welding & PWHT

Preheating is typically unnecessary. Maintain interpass temperature below 150°C. Acceptable heat input falls within the range of 1.0–2.0 kJ/mm, contingent on material thickness; however, many codes impose a maximum limit of 1.5 or 1.75 kJ/mm. While welds in wrought duplex stainless steels are typically preserved in the as-welded state, significant repairs to castings are commonly mandated in the solution-treated condition. Empirical evidence suggests favorable properties following treatment at 1120°C for 3-6 hours, followed by water quenching.

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