ASTM A148 grade 130-115 castings

[arunmrao]

Please advice, suitable chemistry and heat treatment process for this grade of castings. Thanks in anticipation.

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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[bhollands]

You could make 130/115 with a 4130, 8630 or even a 4320 material, depending on any impact requirements. Heat treatment would be a water quench and temper. If impacts are required you would probably want to normalize it before hand.

Bob

 

[dbooker630]

If the casting is to be welded the carbon equivalency should be kept below 0.60%. I prefer polymer over water quench, but if only water is available the parts should undergo MT inspection.

 

[metengr]

http://nwcastings.com/ASTM.aspx

 

[arunmrao]

Thanks,but do you recommend oil quench for this grade,in order to reduce distortions or cracking.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[metengr]

Arun;
At this point, more information would be required regarding casting thickness and geometry.

 

[bhollands]

It will be very difficult to get an alloy with a carbon equivalent less than 60 to give you 130ksi uts with any kind of ductility. It will be difficult to weld any material that hard. It is not impossible with the correct preheat and procedure. 8630 is the cheapest material that I would use and it would have a CE of about 65.

Bob