Skip to main content

[MW:28321] Re: dimension for fillet weld

By Materials & Welding
Lets start with code practice, The throat size or leg length measurements is code specific i.e. EN or ISO code emphasis on throat (a) measurement while the AWS, ASME based on leg length criteria (that what you will generally found in the drawing or refeering AWS A2.4 or ISO 2553.. 
Now referring AWS D1.1, 
AWS D1.1 state that the minimum size fillet weld shall not be smaller than the size required to transmit the applied load ( clause 2.4.2.8) and table 5.7 gives the minimum size of fillet weld required based on base metal thickness involved. The weld measurement of size is the leg length.

while designing or working as per EN/ ISO codes the requirements of minimum and maximum fillet weld is 

Maximum size of fillet weld = 0.7t (where t is the plate thickness, smallest thickness in case of dissimilar thickness involved)
Minimum weld size is based on the application of the weld e.g. for railway the minimum fillet weld shall be 3 mm for aluminium and 2 mm for steel. Here the weld measurement is in terms of throat size. (above is as per EN 15085-3).
For structural welds, design based on DIN 18800-1 is 3 mm.

Above maximum size of fillet weld is based on shear loading criteria. according to which the maximum load that can be transferred by a fillet weld will be 0.7 times of plate thickness. a weld size beyond this will be waste of the resources.

Thanks & regards
Sandeep Kumar

On Friday, August 3, 2018 at 7:56:10 PM UTC+3, Souravbohray wrote:
what should be leg length and throat if  thickness is given in drawing only ?
how to decide it should be fillet of equal leg length or unequal leg length?
if the T joint ( fillet ) plates thickness are same or different than how do decide throat and leg size without help of drawing ?
please reply on the basis of asme sec 9 only.

--
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.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

By Materials & Welding
Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...
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

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