SIDER 2595B is an all position welding electrode designed, to run on direct current, reversed polarity only.
SIDER 2595B is a superduplex coated electrode it is designed for the welding of superduplex stainless steels UNS S32550, S32750. and S32760 (wrought), and UNS J93370, J93380, J93404, CD4MCuN (cast), and similar compositions.
It can also be used for the welding of carbon and low alloy steels to duplex stainless steels as well as to weld "standard duplex stainless steel" such as UNS S31803 and UNS S32205.
SIDER 2595B electrode provide matching chemistry and mechanical property characteristics to wrought super duplex alloys such as 2507 and Zeron 100 as well as superduplex casting alloys (ASTM A890).
This electrode is over alloyed in Nickel to provide optimum ferrite/austenite ratio in the finished weld.
This structure results in high tensile and yield strength along with superior resistance to SCC and pitting corrosion.
The nominal composition (wt. %) of this weld metal is 25.5 Cr, 9 Ni, 3.8 Mo, 0.7 Cu, 0.7 W, and 0.25 N. The sum of the Cr + 3.3 (Mo + 0.5 W) + 16 N, known as the Pitting Resistance Equivalent Number (PREN), is at least 40, thereby allowing the weld metal to be called a "superduplex stainless steel." This number is a semi-quantitative indicator of resistance to pitting in aqueous chloride-containing environments.
Pre-heat is not required. The interpass temperature should be maintained at 150°C max, heat input of 5,000 - 15,000 Joules/cm.
If post weld annealing is required this weld metal will require a higher annealing temperature than that required by the duplex base metal.
Supplied in diameters: 2.0 - 2.5 - 3.25 - 4.0 mm.
(This item is subject to Industry Alloy Surcharges)