Search results for query: *

Thanks I was after the first answer.

Can anyone tell what a good equivalent steel for A194 2HM nut material would be? Thanks

Thanks for the suggestions.

A customer has requested we Heat treat 17-4 PH to specification CHTS 41.11-12. Does anyone know what this spec is?

It's basicaly a cylindrical part, with a variety of IDs, inlayed over a section of the bore where seals are in contact. The whole thing is nitrocarburized. The bore is exposed to oil well production fluids.

One of our customers has quesioned the affect on the corrosion resistance and the ISO15156 compliance of Nitrocarburizing 625 weld overlay on F22. Anyone have any thoughts?

metengr, Thanks looks like PWHT might be too hot, the orginal temper was at 660C.

Thanks for the quick response metengr. Weld process is GTAW with hot wire filler, preheat to 150C interpass 150C to 300C postweld heat treat 660C. The 8630 starts off quenched and tempered with a mimimun yield of 85ksi.

We often use a 625 weld overlay on 8630 components that need to comply with API 6a and NACE MR 01-75 and we are finding a serious reduction (10% to 20%) in the yield stress of the underlying material. Does anyone know of a way to recover this whilst maintaining the NACE compliance?