With regard to the thread on torsion bars I have been trying to find some info on maraging steels.
I did some net searchs and only got 'hey hit 300yd drives with your maraging steel driver, etc, etc'. I then looked in Engineer to Win by Carrol Smith and he states that they are high nickel (up to 18%)steels with cobalt and molybdenum and have high tensile strength and yield strength, good machinability and formability. He also states that maraging steels are very poor with regard to stress reversals and are therefore crap for springs.
This book was writen in 1984 and Smith says that maraging steels should be the wave of the future with further work.
My question is that what development has gone on in the last 15 or so years to make maraging steels good for springs and indeed are they good for springs?
Ben
Maraging Steel
Started by
Ben
, Jun 15 2001 20:31
2 replies to this topic
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#2
Cory Padfield
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- 106 posts
- Joined: May 01
Member
Posted 15 June 2001 - 21:11
Ben,
Carrol Smith was incorrect when he wrote about maraging steels. In fact, he has a fairly poor grasp of the SCIENCE of materials, which is painfully obvious when reading his books.
You are correct regarding the chemistry - ~ 18 mass % Ni, lots of Co and Mo. It can be available with a yield strength of ~ 2300 MPa
, the so-called 300 grade (for 300 ksi tensile strength).
Maraging steels are great for everything, including springs. If you want information regarding this, or any other material, a place to look is:
http://www.matweb.com
At Matweb, you will find references to maraging steels used for springs, etc.
The truth is, little has changed regarding maraging steels since the 1960's. They are fabulous materials, though complex to produce (read: costly).
Cory
Carrol Smith was incorrect when he wrote about maraging steels. In fact, he has a fairly poor grasp of the SCIENCE of materials, which is painfully obvious when reading his books.
You are correct regarding the chemistry - ~ 18 mass % Ni, lots of Co and Mo. It can be available with a yield strength of ~ 2300 MPa
, the so-called 300 grade (for 300 ksi tensile strength).Maraging steels are great for everything, including springs. If you want information regarding this, or any other material, a place to look is:
http://www.matweb.com
At Matweb, you will find references to maraging steels used for springs, etc.
The truth is, little has changed regarding maraging steels since the 1960's. They are fabulous materials, though complex to produce (read: costly).
Cory
#3
Ben
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- 3,186 posts
- Joined: May 01
Member
Posted 15 June 2001 - 21:25
Cheers Cory, I use Matweb a lot but I thought I'd ask around first.
Point taken, Carrol Smith went down in my estimation when I met him a Formula Student last year. He is good at what he knows, i.e. practical race engineering but I agree his scientific knowledge is more that of a layman than an engineer. With maraging steels the available references are less, so any errors are more likely to be perpetuated.
Ben
Point taken, Carrol Smith went down in my estimation when I met him a Formula Student last year. He is good at what he knows, i.e. practical race engineering but I agree his scientific knowledge is more that of a layman than an engineer. With maraging steels the available references are less, so any errors are more likely to be perpetuated.
Ben
