Sanicro® 60 is a nickel-chromium-molybdenum strip electrode used for electro-slag welding (ESW) to deposit a second layer corrosion resistant alloy of Ni6625/UNS N06625 composition on carbon- and low alloyed steels.
It can also be used as buffer layer before depositing second layers. Due to the low carbon content of the strip Sanicro® 60 is often used for single layer deposits when the required Fe content in the overlay is less than 10%.
The grade is characterized by:
- Excellent resistance to stress corrosion cracking in chlorides
- Very good resistance to pitting and intergranular corrosion
- ISO 18274: NiCr22Mo9Nb/Ni 6625
- AWS A5.14/ASME SFA 5.14: EQNiCrMo-3
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Chemical composition (nominal) %
Applications for Sanicro® 60 are found in cryogenics, components subject to high temperature service up to 980°C (1800°F) such as aircraft ducting, engine exhaust systems, power boilers and recovery boilers and a diversity of seawater applications. The combination of strength and corrosion resistance over a wide range of temperatures is utilized in reaction vessels, line pipe distillation columns and heat exchangers.
Forms of supply
Strip electrodes are delivered in coils with internal diameter 305 mm.
|Standard dimensions||0.5 x 30, 60, 90, 120 mm|
|0.4 x 50, 75, 150 mm|
|Max coil weight||700 kg|
Weld metal characteristics
Typical chemical composition of overlays in two layers obtained on C-Mn steel and low-alloy steel.
|Type of overlay||C||Cr||Ni||Mo||Fe||Nb|
The figures for overlay chemical composition are given as examples. The weld parameters selected and conditions under which welding is carried out may influence the result obtained.
Passes side bend testing according to ASME Section IX.
Sanicro® 60 shows very good resistance to pitting corrosion, intergranular corrosion (corrosion rate <0.4 mm/year when tested acc. to ASTM G28 A) and has excellent resistance to stress corrosion cracking in chloride containing environments.
For electro-slag welding (ESW) and submerged arc welding (SAW), weld fluxes are used for protective shielding of the weld metal.
Recommended fluxes for Sanicro® 60