Characteristics and Application
AWS A5.4 E2553-16 is suitable for welding of 25% Cr duplex stainless steel, such as 00 cr25ni7m04n, Ocr25ni6m03cu2n, UNS 32550 (Alloy255), etc. Features: it is a coated titanium calcium type nitrogen of duplex stainless steel welding electrode, both AC and DC can be used. It have good welding technology properties and crack resistance. Weld metal is austenitic, ferritic bipolar organization, has high strength and good resistance to pitting corrosion and stress corrosion crackina erformance.
Typical chemical Composition of Weld Metal (%)
Typical Mechanical Properties of Weld Metal
Notes on usage:
1 Electrode must be approved by 350-380℃ for 1 hour before welding, dry the electrode when use it.
2.The rust, oil, water and other impurities of the weld must be removed before welding.
3.Recommended DC power supply, because AC welding has a shallow penetration, the current should not be too large, in order to avoid the coating redness and cracking.
4. To minimize the amount of heat input and welding electrode oscillating amplitude should not be too bigo
5.Preheat and interlayer-temperature should remain below 150℃
C 0.025 Mn 1.03 Si 0.68 S 0.010 P 0.014 Ni 7.28 Cr 25.38 Mo 3.31 Cu 1.90
Tensile Strenght 864MPa Elongation 21%