Recent content by theedudenator

What about an alloy steel that we can heat treat and then do a secondary coating for corrosion

So the basic thing is the phase approval is handled with a meeting. We were trying to do it with e-mail and it does not work.

These are my parameters. Corrosion resistant Actual stress through design is low, but there is a contact stress that could cause deformation. Materil Rc40 and harder solve this. I was looking a stainless steel type material that can be heat treated to Rc 40 min. I was looking at 440C Is there...

I am looking for some tips on handling phase type approvals in a NPD environment. Any suggestions?

What is the standard way to call out fine grained on an engineering spec? Is it best to reference an ASTM type spec? Or would one need to say "1018 fine grain" But then what spec would define the term "fine grain"

I have a question on what is considered cosmetic type weld repair. If the part is subjected to high stress in a cyclic condition I would assume any surface cosmetic repairs would also be considered stress risers. Any thoughts on this?

You did not read my last post... The casting was normalized after the welding. I would assume this would destroy the structure. I would have thought a temper would be ok.

This was not available. I believe the casting was normalized.. now the hardness is too low. I am assuming the process destroyed the structure created from the quench and temper.. I think the casting is scrap now

How is a stress relief in the weld zone typically applied?

It was not 20% of the section. But this is in a critical area in a highly stressed part. Normally all defects are repaired prior to quench and temper.

The material is genericly ASTM A148 grade 90 60 We have a very tight tolerance on the final machining. ±.0005 We have been quench and tempering, then final machining for 20 years. This is the weld process: metal-electrode arc welding. The defect was completely removed first.

I have a steel casting that is quenched and tempered and then machined Weld repairs were performed after the machining. I am assuming the casting should be re-heat treated. Is it typical to just re-temper? or a full Q&T? Is there a time frame to complete this after the welding is performed...

There is no heat treatments to this part. The bar is 1.25" dia and it has 1" threads that are cold rolled. Most of the bar is machined to 1.125" with a few transitions to less then 1" I image my fatigue failure locations would be in one of these machined transitions as the threads are rolled...

I am aware of some of the advantages in cold vs hot rolled products. This is what I have: 1050 steel shaft, currently cold rolled and turned down to size, and threads added. Possible savings in switching to a hot rolled product. The UTS/YTS of the hot rolled product is less, but still within...

No one?? What about any type of plating and surface finish?