A company is approved by LRQA (UK) to ISO9001:2008.
The scope of this approval is "forgings in carbon,alloy & stainless steels (weight range 0.1 - 160kg)".
The company is also approved to AD2000 Merkblat for WO, W2 & BS EN 10222-5:2000. This is for austenitic stainless steels.This was also...
Thanks guys for all of your input.
EEMUA 218 does imply that water quenching is preferred immediately after forging (not air cool) even though the parts are subject to solution treatment and water quenching subsequently.
The reasons are that undesirable intermetallic phases may be present in...
I understand that best forging practice for super duplex stainless steels (eg A182F55) requires water quenching immediately after forging is completed rather than air cooling even though the parts are subject to subsequent solution treatment.
Has anyone had experience of water quenching this...
This part is a forging made from steel bar of grain size of about 6/7. Forgot to mention that!
Hot forged, then quenched & tempered.
Would agree fully about cleanliness & grain size but will be very unlikely to get GS of higher than 7.
Does anyone have experience of improving the Charpy impact properties of 4130 steel @ -101C in the hardened and tempered condition?
Although general structures and tensile properties are good, Charpy Impact results are as low as 10 to 15 Joules despite good control of heat treatment and testing...
Can someone tell me the methodology of obtaining manufacturing approval to AD 2000 Merkblatt W0.
The company I represent manufactures raw forgings for the Oil Gas & Energy Secto.
A customer has his own specification of the above material which shows mechanical properties above H1150M and below H1150D condition.
In the past the heat treatment for H1150M condition has always been :-
Soln Treat @ 1040C Water Quench followed by 760C held for 2 hrs air cool followed by 620 C...
I think it was pangs of concience and no more. No threats of blowing the whistle were made. I think they realised how scary the consequences could have been.
It isn't fully concluded as yet I think it will be.
I think the QA Manager will come out of this better - sometimes his job is to protect...
Thank you for your input guys
You will be pleased to know that in the last 30 mins the Company has seen sense and will now be discussing the options with the customer and how best to proceed in line with TS16949.
The lesson is that sticking to your ethical principles can generate the right...
Thanks for your quick input.Makes a lot of sense.
Sadly the top of the tree has already been reached.
It looks as though no matter what, the decision is not going to be reversed. The objections are already in writing and it would appear that the consequences have been considered and chosen to...
A company produces parts for an automotive end customer and due to capacity issues wants to sub contract the manufacture of the parts to another facility without the knowledge or approval of the customer. The parts would be supplied "as if" the approved facility manufactured them as normal. This...
Tellurium is added to steels to modify the inclusions and improve machinability.
Does anyone have any experience of hot working such materials (25CrMo4 for example) and experienced cracking problems?
What is the "permissable" surface defect level in hot-rolled steel bar/billet (e.g 80mm round cornered square) which would be supplied as "suitable for upset forging"?
I understand there is an acceptable level even though , after hot forging, the defect will be transferred into the forged part...
Thanks you all
I believe that the heat treatment furnace atmosphere was adjusted with excess gas at some point for some reason and may well be the cause.
Regards
Jimsan
Hello metengr
We forge & heat treat in different furnaces. We haven't done any real checks on the furnace atmosphere at this stage.
Are you saying that the carbon pick up , if that is what it is . is from the atmosphere? If so what is the mechanism?
Jimsam
