Larrin
Knifemaker / Craftsman / Service Provider
- Joined
- Jan 17, 2004
- Messages
- 4,835
In another thread reporting some of our initial charpy toughness testing, we got a couple offers for samples for toughness testing. I would be happy to test more samples for the benefit of everyone. While we might not be able to test everything, I am open to taking more samples to compare. There is very little toughness data out there, especially when it comes to comparing between different manufacturers. I would not be charging for the toughness tests, but anything that we measure will be shared with others.
The sample dimensions would need to be as follows:
2.5 x 10 x 55 mm, with 55mm being in the rolling direction. Samples would have to be ground on the 4 main surfaces (less critical on the ends), and parallel, likely requiring a surface grinder or other precision machining tool.
If anyone is willing to heat treat and machine samples for testing, please suggest in this thread what steel(s) and heat treatment(s) you would like to do. Everything we have done so far has had a liquid nitrogen treatment after quenching and prior to tempering so that we can eliminate the effect of retained austenite, so I would prefer that that step is added on other specimens, unless conditions both with and without cryo are provided.
Current tests that have been performed:
Ideal hardness is 60 Rc, even better is a range from 58-64 Rc. Steels we would like to add (incomplete list):
M390/20CV at 60 Rc
S30V
S35VN
S90V
S110V
Vanax
Elmax
440C
ZDP-189
Micromelt XHP
Conventional XHP
Conventional 154CM
N690
VG-10
14C28N
12C27
Nitro-V
3V
4V
Vanadis 4 Extra
Vanadis 8
10V
CPM-M4
M2
A2
52100
O1
1084
1095
15N20
5160
L6
80CrV2
O7
1.2519
1.2442
1.2562
F2
Blue 1, 2, Super
V-Toku 1, 2
The sample dimensions would need to be as follows:
2.5 x 10 x 55 mm, with 55mm being in the rolling direction. Samples would have to be ground on the 4 main surfaces (less critical on the ends), and parallel, likely requiring a surface grinder or other precision machining tool.
If anyone is willing to heat treat and machine samples for testing, please suggest in this thread what steel(s) and heat treatment(s) you would like to do. Everything we have done so far has had a liquid nitrogen treatment after quenching and prior to tempering so that we can eliminate the effect of retained austenite, so I would prefer that that step is added on other specimens, unless conditions both with and without cryo are provided.
Current tests that have been performed:
Ideal hardness is 60 Rc, even better is a range from 58-64 Rc. Steels we would like to add (incomplete list):
M390/20CV at 60 Rc
S30V
S35VN
S90V
S110V
Vanax
Elmax
440C
ZDP-189
Micromelt XHP
Conventional XHP
Conventional 154CM
N690
VG-10
14C28N
12C27
Nitro-V
3V
4V
Vanadis 4 Extra
Vanadis 8
10V
CPM-M4
M2
A2
52100
O1
1084
1095
15N20
5160
L6
80CrV2
O7
1.2519
1.2442
1.2562
F2
Blue 1, 2, Super
V-Toku 1, 2
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