ER410NiMo impact properties

[GRoberts]

Has anybody tested this type of material with CVNs at or near 0F (-18C). We are needing 50 ft-lb and our standard FCAW and SMAW electrodes don't usually make it even at room temperature. 40-45 ft-lb would be typical. I was looking at GMAW since the CVNs are usually better than FCAW or SMAW depending on the situation. Probably spray type transfer with 98%Ar, 2% O2.

 

[andyenergy]

Sounds difficult to me. Although I'm not an expert in these materials, one of the more specialised comsumable manufacturers, Metrode, quote 50J (37 ftlb) at +20C, 40J (29 ftlb) at -40 C after a PWHT of 595-620 for 1 hour air cooled.

It would be worth dropping Metrode a line to see if they have any better data for GMAW.

They are on

http://www.Metrode.com

Sorry I can't help any further

 

[Carburize]

From my testing of weld materials I would think it very unlikely that you could achieve thses values consistently with this consumable from any process.

 

[GRoberts]

I had the same thoughts as Carburize when I was intially getting involved with this project, but as I don't have any thing else available at the moment, I am going ahead with a GMAW welding procedure to see what kind of results I can get. Otherwise, I may have to look for a different kind of filler metal. I don't think duplex will work because in the thick section we weld. We have to PWHT to for a fairly long time (couple hours)to get adequate HAZ tougness (CA6NM), and it would degrade the toughness of the filler metal (sigma and carbide precipitation). Low carbon austenitic would not meet the strength requirements. I am thinking that supermartensitic filler metal may be an option, but I don't have any experience with them on either availability or use. They seem like they could have higher toughness than the 410NiMo type. Anybody out there using these types of fillers, or think of something else that may work? I know nickel based filler might work, but that would also add significant $$$ to the project.