13 cr

That could be a yes or, it could be no.

Depending on so many unrevealed details of operating environment, parameters pressure, fluid, operating conditions, etc.

Details from you are needed.

Given the current (lack of) information, the answer is yes.

Service : LPG

Wow. A Low Price Guaranteed!

Ask your supervisor if these materials can be swapped. You do not provide enough information for the safety of your clients, your company, or your job.

LPG - Definition by AcronymFinder

It might be a Liquid Propellant Gun. A ball valve could easily be part of the release mechanism or filling valve.

You don't have to ask us for permission to replace this material. The fact that you have asked us tells me you have unstated concerns about this material swap.

Both steel materials have very good corrosion qualities but the devil will always be in the details. Without knowing what your concerns are this question is fraught with potential peril.

You should be asking your supervisor and/or engineering staff about your concerns. They are the ones who can give you permission to swap materials for your company's product.

No, 2 different animals...

https://contalloy.com/products/grade/13cr-l80

https://www.azom.com/article.aspx?ArticleID=2868

Are you suggesting he cannot interchange these two in his, unknown, application?

ss316 is not a direct replacement for 13cr....If 13cr has been specified, you cannot substitute ss316....

https://www.cralloys.com/alloys/13-chrome/

https://www.sandmeyersteel.com/images/316-316l-317l-spec-sheet.pdf

But they didn't even tell us that 13cr was specified. They only implied that they used 13cr at one time.

We have nothing to base any feasible conclusion on.

13cr is a special application material, it would have to have been specified to comply with code to justify the cost, it's not something you would choose without reason....probably corrosive high temp application...

It is immaterial how special is the material to be replaced. We do not know anything about how these materials might be used, outside of being for the ball and stem of a ball valve. They might be looking for a new product improvement from a variety of attributes like durability, manufacturing costs, or just simply material availability.

We don't know diddly squat about this former and latter ball valve product.

What I wish we did know was what company seeks out for this type of engineering help from a public forum with so little information provided. I'd avoid that company for years.

There you go again!

This highly improbable suggestion is absolutely incorrect and very misleading "probably corrosive high temp application..."

We don't know that! We don't know anything, and I doubt this person does either.

Well if I had all the needed technical information, then I might change my mind...but the answer to the question as it stands, is no...If the 13cr was not specified in the first place, then why ask if it can be replaced?

https://www.sciencedirect.com/topics/engineering/stem-material

If the reason for the question is that the stem keeps cracking, then we need to know the reason why, before a recommendation can be made....

OMG!!!!! How completely ridiculous your are. Arrogant too.

You, I and the forum DO NOT KNOW ANYTHING about any of this. You have no clue!!

You are making things up so you won't look so.............uninformed!

IT AINT WORKING!~~

I'll leave you to your fantasies of authority!

Bye.

..."Stem material for normal carbon steel body valves can be martensitic stainless steel 13Cr(chromium) (ASTM A217 CA15), which is applicable for design temperatures as low as − 29°C without an impact test as per ASME B31.3 Table A. 13Cr can be used for temperatures as low as − 46°C subject to the impact test.

13Cr4Ni has more toughness compared to 13Cr and can be used for temperatures as low as − 46°C without an impact test. Nickel affects the toughness of this material and does not affect the corrosion resistance. 13Cr and 13Cr4Ni should be avoided as the stem material for carbon steel body valves due to the risk of external stress cracking corrosion. But 13Cr4Ni (nickel) is stronger than 22Cr stem.

In fact, 13Cr has less general corrosion resistance than SS316 with 18% Cr. However, 13Cr has higher erosion resistance (15%–20% higher than SS316) so it is not acceptable to exchange 13Cr with SS316 for valve trim. 13Cr4Ni has higher mechanical strength than 22Cr duplex. But 13Cr classes 1 and 2 have less mechanical strength than 22Cr duplex, unlike 13Cr classes 3 and 4."...

You can find your answer in this chart which has materials for different conditions of LPG.

https://assuredautomation.com/propane-gas-valves/

I don't understand your point. Both alloys are considered to be stainless steel.

CR4 is not a permission-giving entity.

The <...we...Can...>, in principle, use whatever is compatible with both the desired mechanical characteristics of the valve and the range of wetting fluids, pressures and temperatures. However, it does need to consider before so doing the warranty and liability issues that may arise after any incident were a material to be used that is different from that originally specified.