Skip to main content

RE: [MW:23147] cladding of spherical surfaces by stellite

By Materials & Welding
Dear Sir

The sellite grade is 6, and the operating temperature is less than 100 C.

Regards,
Himan

Date: Tue, 21 Apr 2015 06:18:51 -0700
From: acetapasvi@gmail.com
To: materials-welding@googlegroups.com
Subject: Re: [MW:23139] cladding of spherical surfaces by stellite

Hello Himan,

One of the main issues that can be encountered is the mismatch in thermal expansion properties when service temperature plays a role (mismatch can also play a role during solidification of clad if the cladding parameters are not crafully chosen) . In such instances cladding is actually good because, due to the dilution, it can create a gradual gradient in such properties and reduce the mismatch. But the dilution zone from the cladding process is known to form sigma phase (hard and brittle phase) at high temperatures. So my questions to you are:

1. What grade of Stellite is going to be cladded
2. What are the service temepratures like. 

On Monday, April 20, 2015 at 3:59:02 AM UTC-5, Venkatesan Mass tech wrote:
Dear sir,
         please give the dimension of the ball valve size.
On Apr 20, 2015 9:12 AM, "Himan Nikdin" <himan....@outlook.com> wrote:
Dear Experts;

My ball valve vendor claims that "it is not recommended to clad ball part of ball valve by stellite", I am looking for a reference to find is there any specific  limitation for this material.
The ball material is "SS316L".
If yes, is this limitation applicable for other stainless steel material like "13%Cr".

Thanks
Himan Nikdin

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To post to this group, send email to material...@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/BLU180-W672B8F468DF26C214D739A9EE10%40phx.gbl.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/64ff8bb8-20b3-4b53-8719-c3fc6e25873e%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more