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Hi, I am looking for a composition information on what is referred to as "Alloy Steel, grade 12.9" Any help would be appreciated....

Thank you guys!! :)

I am looking for a reference to select a center drill to machine centers into a shaft that is over 2 inches in dia. All the information I have specify drills for shafts upto 2 inches but not beyond that. Does anybody have any reference that I can use for drilling centers onto big shafts...

Well..Mn was the primary suspect initially, but I am not sure anymore. We might do an analysis based on the Oxygen and Nitrogen content, which according to a source might also be culprits.

Also, to let you guys know, the annealing temperature we used was around 1600 F and was for around 2.5 hrs.

Hello, I posted this topic in the magnetic engineering forum earlier and got many useful replies. I was just wondering whether any of you have any inputs... Heres the situation...We were using AISI 1008 low carbon steel, as a soft magnet for our electromagnetic application. We didnt have any...

Ed Stainless, thank you for your response. I might sent the samples again for an analysis report. Could you/anyone just quickly familiarize me how Pb, Sn, Sb, N, and Bi would affect the perm. and/or saturation. How about Oxygen content too?

Thanks for all the replies.... I have to ask this, Does annealing temperature have that much of an effect on the magnetic property???

Magmike, yeah thats exactly what bothers me too...The parts were annealed after machining and was basically the same size and shape as that of 1008. We have been using low-carbon steels for the application for quite some years now and didnt expect 1005 to behave this badly. Edstainless, I am...

Again, Magmike, I just got information that we already sent it out for Annealing, but it didnt have any difference. Specifically the B-H curve for 1005 is considerably lower than that of 1008.

Thanks for your replies guys. Yeah I was just thinking of the composition difference and not about the heat treatment. May be that is the reason...

As far I know for now, it was bad in the Magnetic Strength along with a noted decline in almost all the properties.

We were using AISI 1008 low carbon steel for an electromagnetic application. We didnt have any problems yet, until recently when we switched vendors and started getting AISI 1005. The magentic properties are very worse and I was wondering what could be the contributor to this. We ran a lab test...