We have an impressive FCAW product; MEGAFIL 821R. It has superior, welding characterisitcs and impressive charpy impact values > 47 J @ -60°C. The product is seamless flux cored wire and the diffusible hydrogen values are lower than the competitions without the need for hermetically sealed packaging or minimum order quantities or the need to rebake.

The E81T1-Ni1 has a specified impact value of 27 J @ -30C. An E80T5-Ni1 has 27 J @ -51C, an E80T5-Ni2 has 27 J @ -60C, and an E90T5-D2 has 27 J @ -51C. The E80T5-Ni1, E80T5-Ni2, and E90T5-D2 are for postweld heat treated.

I am now using FCAW with mixed gas for my project of pipe welding.
The requirement is 47J at -30 degree C at the root area in 3G position which is the most difficult position. For asme purpose we tested -48 degree C and had satisfactory result(as welded or PWHT).
I am using following consumable;
Hyundai Supercored 81MAG(80% Ar and 20% CO2).
It has 0.9% Ni and Ti and B addition.
It has excellent workabilities(not basic type).
AWS Classification: E81T1 Ni1
Size: 1.2mm
Hydrogen: less than 5ml/100g