Hello,
is there any significant difference between heat treatment of 13% and 18% Mn steels?
Severals years ago, I had a discussion with specialist from local Metso foundry and he told me, that temperatures are the same, but 18% Mn steels are more sensitive to speed of quenching.
At that time I...
Hello,
our customer sent us new supply specifications in which he demands following:
Test report on graphite formation
o Form of graphite
o Quantity (%) of graphite form in each case
o Nodularity index (%)
o Nodule density per cm²
o Quantity (%) of ferrite/perlite
o Nodule size of graphite
All...
Hello,
Our customer demands Ac3 value for his final heat treatment of our castings. We asked him according to which formula, although the material chemistry is his, he wants it from us.
Can anyone guide me, which of "dozens" Ac3 formulas could be used for low alloyed steel with the folowing...
Hello All,
I would like to ask your knowledge to get proposal for steel with these properties:
- yield strenght min 400 MPa
- tensile strenght min 500 MP
- elongation min 20%
- CVN-60°C min 20J
- CEV max 0,50 or max 0,60
- it should be for castings with wall thickness 50-100 mm
- it should be...
Hello all,
our customer demands casting made of steel AISI 8640, Q+T to 269-331 BHN. No other mechanical properties were demanded, and when we asked for them, the response was that "The hardness required is 269-331 BHN and the remaining as per standard AISI 8640".
I googled 50 pages, but...
Dear All,
I would like to know, if there is equivalent EN,ISO or ASTM standard to AMS2750.
I found only a little bit about TUS (temperature uniformity survey) in EN ISO 17663, but there is almost nothing about TC calibration (except that TCs are stable and precise and do not need any...
Hello all,
could some standard expert explain to me, what does .3 mean in materials such as GS-38.3, GS-52.3...?
In my June1985 edition of DIN 1681 there is no such material name, only without .3.
In Stahlschlussel 2013 there is no such material, only GS-52.3 as a trade name for GS-52.
I found...
Hello,
Would there be anyone to help me understand section 7.2.1 Chemical composition from EN 1559-2?
I have national version of that standard so I apologize for my reverse translating to English.
Or if there would be someone to paste english(or german) version of that section?
Text...
Hello,
our company was asked with delivery of castings made of steel with these parameters:
1) chemical composition: C max 0.25%, Mn max 1.00%, Si max 0.50%, Cr max 0.25%, Ni max 0.35%, Mo max 0.10%.
2) CE max 0.42 (acc. to CE = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15)
3) yield strenght min 300 MPa...
Hello,
I would like to ask you for help with heat treatment.
We have serious troubles to reach mechanical properties CVN) from test block from material GX120Mn13.
Chemical composition GX120Mn13 is in range C 1,15-1,30%, Mn 12,00-13,00%, Si 0,30-0,50% and Cr max 0,50%.
Test block has size 75 x...
