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Does anybody had experience with machining of castable super invar. I am working on centrifugal castin ring. Material is special super invar containing 28Ni-14Co-0.5C. After machinig and PT I saw some crack like indications. Is it possible that cracks occure due to bad machining? Does super...

Hi, What is the meaning of occasional grain ? How can I measure size of occasional grains and how shall I report it (max occasional grain)? Is there any standard for determining occasional grains in metals? I need to determine average grain size and max occasional grains in IN718 forging part...

Did anybody heard something about alloy inconel 3501. A special Fe-Ni-Co alloy with low coefficient of thermal expansion?

Hi I work on casting that has different wall thickness in different areas of casting. How I can determine the relevant wall thickness of a casting?

Hi, Is it usual to stress relieve an A356-T6 Al ring that cut & rough turned from tubular casting? If it should be done, what is its temperature?

Hi Dear friends We have pipe with outer diameter 62 mm and thikness of 2 mm. we made it by machinnig a thiker pipe with thikness of 5 mm. we machined both inner and outter face of thiker pipe. How we can test the new pipe fatigue life while it work in 120 C with 6 bar inner pressure? Is there...

which is better for high temperature application and has good corrosion resistant "Cast CA6NM" or "Cast 9CR-1MO (V,Nb)" STEEL?

Hi, Could anybody help me to find CA6NM steel TTT diagram? I look in Heat treaters guide and I cant find it?