High Impact Strength Steel
High Impact Strength Steel
(OP)
I'm looking for a material recommendation for what we think is a rather extreme design. We are firing a steel piston into a steel anvil with an impact speed of 50m/s. Current attempts have resulted in material failure. We need a steel that can withstand this impact over a low cycle range. Right now we are running at room temperature however our real interest lies in properties at around 400C.
Some recommendations I've received are VascoMax C-250 (maraging steel) and DIEVAR hot-work tool steel.
Any thoughts on these alloys or other recommendations would be greatly appreciated.
Some recommendations I've received are VascoMax C-250 (maraging steel) and DIEVAR hot-work tool steel.
Any thoughts on these alloys or other recommendations would be greatly appreciated.





RE: High Impact Strength Steel
Several questions to better your material selection;
1. What strength level is required for the steel?
2. How do classify failure? If steel piston tears the steel anvil or penetrates completely through the anvil?
3. What thickness is the anvil?
RE: High Impact Strength Steel
an inexpensive alternative may be 5160 steel, which is common in leaf springs.
RE: High Impact Strength Steel
One additional question, does the projectile have to be reused ?
http://www.diehlsteel.com/h13.aspx
RE: High Impact Strength Steel
The anvil and piston that this will tested on are both 4" dia and 4" long. We will however be using this data to validate approaches at a larger 12" dia x 12" long version. Any significant cracking is considered a failure, and yes the idea is to fire many times (low cycle).
A recent attempt at this speed (only one shot, on the larger version) with S7 resulted in severe cracking which is why were are now looking for something new. I should note however that this was tested at room temperature.
Any and all recommendations will be considered and highly appreciated!
RE: High Impact Strength Steel
Because the vast majority of the property known as toughness is from a material's ability to absorb energy as it's plastically deformed, it means your piston/whatever will have some permanent size changes after every shot.
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: High Impact Strength Steel
RE: High Impact Strength Steel
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: High Impact Strength Steel
At zero degrees incidence, your projectile will obviously either shatter, deform or penetrate to some degree. If you don't want shattering or penetration, you must accept deformation. Based on past results, higher toughness (area under the stress-strain curve) is necessary. (400deg C is a step in the right direction. Can you make it 500C?)
This book may be helpful in selecting a toughness-strength compromise. ht
Also Zukas is a good source for material behavior at 'high strain rates':
http://bo
RE: High Impact Strength Steel
http://www.questek.com/ferrium-m54.html
Jim
RE: High Impact Strength Steel
Here is a brochure that gives some comparison date for several alloys including the Aermet Alloys.
http://
Off the wall:
You might want to talk to the Astralloy folks, Birmingham, about their Astralloy V bar as well as other V alloys
http://www.astralloy.com/pdf/astralloy_v_plate.p
RE: High Impact Strength Steel
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RE: High Impact Strength Steel