Re: [MW:24668] Regarding Tensile test.

Dear Mohit

Why you press those two ends?

For full pipe testing, the normal way is using mandrel/plug in two ends and then doing the test. Pressing may cause unpredictable deformation in small size pipes and lead to un-normal fracture.

Then check your acceptance criteria. Minimum elongation required for different samples with different gauge length (proportional and non-proportional) may be different. Check required elongation related to your case.

Then check the fracture surface and look for any defect which may cause unexpected fracture and then unacceptable elongation.

Also check the fracture area. It should be in the middle half of the gauge length. In other cases (fracture occurs out of gauge or near two ends) the test (usually sample preparation) may contains some errors and could be discarded and retested (It depends on your reference standard).

Also you may check ISO 2566-1 for elongation conversion in carbon steels. It may be helpful.

Regards

On Mon, Apr 11, 2016 at 11:53 AM, Mohit Aggarwal <aggarwalmohit05@gmail.com> wrote:

Dear Sir,

Greetings of the day!

I have one query, I have done Tensile test for full Pipe specimen OD 25.7mm and thk 2.1 mm material SS 304L according to EN standard by calculating gauge length by consideration the OD of pipe with formula 5.65 x square root of Area which is coming 130 mm rounded off . In UTM machine I have select hollow pipe section and tensile strength is coming automatically with these settings.
But elongation is coming 32% and minimum required is 40%. We have done test by pressing the pipe ends.

Kindly let me know where is actual problem can oocurs.

I will be thankful to you.

Best Regards,
Mohit Aggarwal

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
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.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CALTezPPPV9P8U4mzjp%2BV_6c4q4mCQxNZnpPEoykdZdj0WZE3EA%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

M. Shokri Arfaei

ASNT NDT Level III

International Welding Engineer

Mob.:+98 912 1394023

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
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.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAC8uMttUCvVaH2A0FPfCRuM2-AixKnSwQf1mVfzO1ZkC79_g-g%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

Materails FAQs

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...

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

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...

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

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, ...

Materials & Welding

Search This Blog