Superaustenitic and nickel base for oil and gas

As the chemical industry developed in the 20th Century, so the need for increasingly corrosion resistant alloys grew. The effect of molybdenum on improving pitting and crevice corrosion resistance and the influence of nitrogen on stabilising austenite in stainless steels were combined to form a series of alloys widely known as superaustenitics. The latest generation fully austenitic stainless steels with elevated, 6-7%, molybdenum alloying and a higher nitrogen level (and possibly increased Mn), show significantly improved resistance to crevice and pitting corrosion attack, during prolonged exposure to media containing high levels of chloride ions. They are also significantly stronger and have a 0.2% proof strength which is about 40% higher than that of the 6% Mo grades.

Our range of matching and nickel base consumables has been designed for joining corrosion resistant superaustenitic stainless steels. We have an extensive history of supply to foundries and fabricators for offshore oil and gas and chemical plant.

Note: Please click on below products name to download our products index.

Alloy

Process

Product

Specifications

AWS

BS EN

904L

MMA

Ultramet 904L E385-16 E 20 25 5 CuNL R
Ultramet B904L E385-15 E 20 25 5 CuNL R
TIG/MIG 20.25.4.Cu ER385 20 25 5 CuNL

825/Alloy 20

MMA

E825L-15

DIN: EL-NiCr28Mo
TIG/MIG

82-50

ERNiFeCr-1 BS: NA41

310L

MMA

25.20.LR

310MoLN MMA Ultramet B310MoLN

BS: 25.21.2.LMn.B
Matching 6%Mo MMA 20.18.6.Cu.R

625

MMA

Nimrod 625 ENiCrMo-3 E Ni6625
Nimrod 625KS ENiCrMo-3 E Ni6625
TIG/MIG/SAW

62-50

ERNiCrMo-3 SNi6625

C22

MMA Nimrod C22KS ENiCrMo-10 E Ni6022
TIG/MIG

HAS C22

ERNiCrMo-10 SNi6022

59

MMA Nimrod 59KS ENiCrMo-13 E Ni6059
TIG/MIG

HAS 59

ERNiCrMo-13 SNi6059

Chemical plant agitator blades welded using Metrode 82-50 TIG and E825L-15 electrodes. Nimrod 625 Electrodes were used for the capping layer.

BP Chemicals plant extensive users of Metrode superaustentic consumables on a variety of applications.