Charpy test for grade F51/2205
Charpy test for grade F51/2205
(OP)
I have received material F51 that carried out charpy test at -46 celcius(pass) but our customer request to carried out at -50 celcius. Surprisingly the value is very far different,
temp Joule
-46 celcius 56,71,76
-50 celcius 8,10,12
Anybody can explain this?
temp Joule
-46 celcius 56,71,76
-50 celcius 8,10,12
Anybody can explain this?





RE: Charpy test for grade F51/2205
RE: Charpy test for grade F51/2205
The specimen test is 10x10x55mm. cut at longitudinal same for both test. Here I give you more detailed info:
Grade F51:
Dia. Size 80mm:
temp Joule
-46 celcius 56,71,76
-50 celcius 8,10,12
Dia Size 90mm:
temp Joule
-46 celcius 300,300,300
-50 celcius 54,80,102
Dia Size 100mmm:
temp Joule
-46 celcius 165,186,176
-50 celcius 34,12,38
Can you explain what is the problem?
RE: Charpy test for grade F51/2205
for your info, -46C is tested by our supplier, while -50C is tested by us.
RE: Charpy test for grade F51/2205
Is 1.4462 UNSS31803=F51? Is the bar product is also claim as forging product? please help
RE: Charpy test for grade F51/2205
For ASTM A182, bar stock does not constitute a forging. Whether the same applies under DIN/EN, I'll leave that to someone else who has the standard.
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Charpy test for grade F51/2205
RE: Charpy test for grade F51/2205
4.4 The material forged shall be as close as practicable to the specified shape and size. Except for flanges of any type, forged OR rolled bar may be used without additional hot working for small cylindrically shaped parts within....
One can manufacture forged bar and meet this specification.
RE: Charpy test for grade F51/2205
I suspect the heat treatment maybe goes wrong,
OD80mm: Holding time =2hrs
OD90mm: Holding time =2.5hrs
OD100mm: Holding time =2hrs
OD114mm: Holding time =3hrs,70J at -50C(same supplier)
Since OD80mm and OD90mm not pass, while OD100mm and OD114mm pass, so may I conclude that the heat treatment not proper causing the failure.
RE: Charpy test for grade F51/2205
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04