Tungsten in medium carbon steel
Tungsten in medium carbon steel
(OP)
Would the addition of tungsten, .55%, to 4340 mod, (300m),contribute a few points of hardness after tempering to spec?
I would like to add a little hardness without sacrificing strength or toughness or reducing the draw temp.
I would like to add a little hardness without sacrificing strength or toughness or reducing the draw temp.





RE: Tungsten in medium carbon steel
What about 4345?
http://www.welding-advisers.com/
RE: Tungsten in medium carbon steel
RE: Tungsten in medium carbon steel
The particular alloy is actually 4350 mod. so it's still med carbon.
RE: Tungsten in medium carbon steel
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RE: Tungsten in medium carbon steel
RE: Tungsten in medium carbon steel
RE: Tungsten in medium carbon steel
To get 4340 per se you will have to use a polymer quench and if the part has any intratcies this could be problem with cracking. At the higher hardness 4340 has low impact values.
RE: Tungsten in medium carbon steel
I happened to have some free W.
I was not sure if tungsten resisted tempering, or it just uped' the average carbide hardness.
Thanks.
RE: Tungsten in medium carbon steel
http://www.key-to-steel.com/Articles/Art128.htm
RE: Tungsten in medium carbon steel
This property is made use of in design of roll guides . The guides are in constant contact with the material ,i.e abrasion and high temperature. The guides should not wear out fast as this could result in "cobble".
I produce an alloy for this application. It has 1.8% C, 18% Cr,1.5% W,0.6%Va oil quench and double tempered .
RE: Tungsten in medium carbon steel
right now i'm experimenting with medium carbon, as I am after 100% lath martensite, for strength and tougness, with the nickel adding impact resistance. I'm just a little weak on the hardness. I need a tough 60Rc, using the chemistry close to 300m.
RE: Tungsten in medium carbon steel
RE: Tungsten in medium carbon steel
Take a look at the following steel compositions:
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These are the highest Ni tool steels that are typically used. Increasing the Si and W would certainly increase the temper resistance, so high temperature tempering should keep the hardness up. Off the top of my head, I do not know if the toughness of this type of alloy (additions of Si & W with high Ni) would be seriously compromised to the point where you might just use a typical tool steel hardened to 60 HRC like M2 (powder metal version). Also, there are some advanced PM tool steels like Micro-Melt PD#1 from Cartech that have much improved toughness at 59-60 HRC vs. conventional PM grades like M2, A11, etc.
RE: Tungsten in medium carbon steel
Regards,
Cory
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