A352 LCC Special Impact Testing
A352 LCC Special Impact Testing
(OP)
Client has special Impact Test requirement of 30J at -60C
Minimum per ASTM for LCC is 20J at -46C
We were going to use LC3 to meet requirement but issue with supplier forced us to go in another direction. So can we get LCC to meet this requirement? I've seen MTR for LCC have Energy values way in excess of 20J at -46C, so I'm thinking it may be possible to achieve the 30J at -60C but just not 100% certain because I don't know how the lower temp adversely affects the Energy value.
If LCC is no good, then I'm thinking CF3M is another alternative.
Minimum per ASTM for LCC is 20J at -46C
We were going to use LC3 to meet requirement but issue with supplier forced us to go in another direction. So can we get LCC to meet this requirement? I've seen MTR for LCC have Energy values way in excess of 20J at -46C, so I'm thinking it may be possible to achieve the 30J at -60C but just not 100% certain because I don't know how the lower temp adversely affects the Energy value.
If LCC is no good, then I'm thinking CF3M is another alternative.





RE: A352 LCC Special Impact Testing
RE: A352 LCC Special Impact Testing
RE: A352 LCC Special Impact Testing
If you review the ASTM material specification you will find the recommendation for using liquid-quenching to achieve desired low temperature properties (aka notch toughness). I think you try normalization and temper if the wall thickness of the component is less than ½” and carbon content is on the lower end of the range. Cooling during normalization has to be with air movers or liquid spray.
RE: A352 LCC Special Impact Testing
RE: A352 LCC Special Impact Testing