Skip to main content

[MW:35832] Re: Hardness range for CS+ Alloy0625 clad welding

By Materials & Welding
Dear Saurabh,
Refer Table A.12 of NACE MR0175/ISO 15156, where Inconel 625 is designated as Type 4d.
Refer Table A.14. From Temp<149°C, Inconel 625 can be used for all conditions, stipulated in table. Hardness to be limited to 40 HRC max. (392 HV).


Regards,
Mohammed

On Tuesday, August 19, 2025 at 7:47:46 AM UTC+5:30 Saurabh Jain wrote:
Dear experts.

I am currently in the process of qualifying a PQR for API 5L X65 + A350 LF6. Both material consists of a base metal with alloy 0625 cladding. Welding process: GTAW+SMAW

During the mechanical testing, I witnessed the following hardness values:
Clad material: 300 to 390 HV
Weld metal: 280 to 350 HV

This is for Aramco project, so I referred their standard 01-SAMSS-044, and it specifies that I must refer to NACE MR0175/ISO 15156 for hardness acceptance criteria, particularly for the clad.

I have reviewed the standard but cannot find a specific acceptable hardness range. I also checked Aramco's W-11/W-12 and W-16 standards but was unable to find the maximum allowable hardness for clad welding.

My question is: Are these recorded hardness values for the clad and weld metal acceptable under the NACE MR0175/ISO 15156 standard? If not, what are the typical hardness limitations and under which standard?

Regards 
Saurabh Jain

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
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 view this discussion visit https://groups.google.com/d/msgid/materials-welding/a43d8910-6d95-4287-be8b-e6b26c0728d5n%40googlegroups.com.

Comments

Post a Comment

Popular posts from this blog

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

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

Re: [MW:10788] ON PLOT PIPING & OFF PLOT PIPING

By Materials & Welding
Piping systems involved for the flow lines and gathering lines from the well head isolation valve to the production facility or processing plant isolation valve are determined as OFF PLOT. ON PLOT defines piping system in the processing plant and production platform. ANSI/ASME B31.4 applies for off plot piping system. B31.4 allows the use of either API 1104 or ASME section IX (as appropriate). However, occasionally, a very small system such as piping within 500 feet of a processing plant (some client also said 400 feet) may be declared B31.3 rather than B31.4. When B31.3 is invoked, only ASME Section IX is used. before you decide which code to use for welding procedure and/or welder qualification for pipe welding, you have to know the design and construction code applicable to the system. Please read far enough into scope and diagram illustrating the application of either B31.3 and B31.4 hope this helps rgds 2011/4/21 pradip kumar sil < pradipsil@gmail.com > Dear all, ...
Post a Comment
Read more