|1 layer 24.13.L + SAW Cr comp. flux
1 layer 23.12.L + ESW flux, high speed
1 layer 24.13.L + ESW flux, high speed
|Good resistance to general corrosion, limited resistance to pitting. Resistance to intergranular corrosion (IGC) in Strauss testing good if not PWHT.
||General purpose austenitic weld overlay for mildly corrosive media. Low cost overlay as only one layer is necessary. Usually not post-weld heat treated (PWHT) as C content is >0.03%
|2 layers 24.13.L/19.9.L + SAW Cr comp. flux
1 layer 22.11.L + ESW flux
1 layer 23.12.L + ESW flux, moderate speed
|Same resistance to general and pitting corrosion as 18/8. Good resistance to IGC, even after PWHT (Strauss/Huey). Ferrite content for SAW can be controlled by the choice of flux.
||General purpose austenitic weld overlay for mildly corrosive media. In principle same applications as 18/8. The most common weld metal. Required properties can be reached in one layer with ESW.
|1 layer 24.13.LNb + AW Cr comp. flux
2 layers 24.13.L/19.9.LNb + SAW Cr comp. flux
1 layer 21.11.LNb + ESW flux
1 layer 23.11.LNb + ESW flux, moderate speed
1 layer 24.13.LNb + ESW flux, high speed
|Same resistance to general and pitting corrosion as 18/8/ELC. Very good resistance to IGC, even after PWHT up to 690oC (1274oF).
||General purpose austenitic weld overlay for mildly corrosive media, also at elevated temperatures. Often the preferred choice if service temperature is above 400oC (752oF)
|2 layers 21.13.3.L/19.12.3.L + SAW Cr comp. flux
2 layers 24.13.L/19.12.3.L + SAW Cr comp. flux
1 layer 21.13.3.L + ESW flux
|Better resistance to pitting than the 18/8 types and to all acids, except nitric acid. Almost equal resistance to IGC as 18/8/Nb after PWHT.
||Used where better resistance to corrosion in acids or pitting is required. Common choice for heat exchangers, e.g. in the petrochemical industry or offshore. The Mo content, which is important for corrosion resistance, varies with the procedure. For higher corrosion resistance requirements use 20/25/5/Cu/ELC.
|2 layers 25.22.2.LMn v+ SAW flux 31S
2 layers 25.22.2.LMn + ESW flux 37S
|Very good resistance in ammonium carbamate and nitric acid. Huey testing is commonly used for qualification. The overlay will pass max. 1 µm/48 hours and max. 70µm selective attack. Fully austenitic.
||One of the most commonly used weld overlays in urea plants, where austenitic overlays are required.
|2-3 layers 20.25.5.LCu + SAW Cr comp. flux
2-3 layers 20.25.5.LCu + ESW flux
|Very good resistance to pitting and acidic corrosion. Good resistance to stress corrosion cracking due to the high Ni content. Strauss testing satisfactory after PWHT up to 5 hours at 600oC (1112oF). CPT is 30oC (86oF).
||Used in the chemical, petrochemical, pulp and paper and metallurgical industries, often in connection with seawater cooling. This grade is used where fully austenitic overlays are required.
|2-3 layers 22.8.3.L + SAW Cr comp. flux
2-3 layers 22.8.3.L + ESW flux
|Good resistance to IGC. CPT is 25oC (77oF). Good resistance to stress corrosion owing to its ferritic-austenitic microstructure.
||Used in the process industry to solve problems of stress corrosion cracking (SCC) and pitting. Its high strength makes it very resistant to erosion and therefore suitable, for example, for valve seats, especially in seawater. Cost effective alternative to fully austenitic overlays.
||2 - 3 layers 25.10.4.L + ESW flux 47S
||Excellent resistance to stress corrosion cracking. Excellent resistance to pitting and crevice corrosion. CPT 45ºC
||Used in chloride-containing bleaching environments in the pulp and paper industry, seawater applications and the chemical industry.
|2-3 layers Sanicro® 72HP + SAW flux 50SW
2-3 layers Sanicro 72HP + ESW flux
|Good resistance to IGC also after PWHT. Good resistance to stress corrosion cracking (SCC).
||High nickel alloy mostly used in the nuclear industry, e.g. for tube sheets and outlets. For higher corrosion resistance requirements use 30/60/Nb/ELC.
|2-3 layers Sanicro® 69HP + SAW flux 50SW
2-3 layers Sanicro 69HP + ESW flux
|Better resistance to IGC than N06600. Good resistance to stress corrosion cracking.
||High nickel alloy for nuclear steam generators, e.g. for tube sheets and outlets.