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...
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...
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...
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...
We have produced forgings in ASTM A182F44 material and subsequently heat treated @ 1150 C Water Quench
At some point during either the forging or heat treatment process we appear to have picked up carbon in the forging surface resulting in chromium carbides at the surface.
We did not use any...
