Answer / kr

EN mean europian norms (british standard)

genarally EN8, EN24,EN40 use in roundbar designation,

and chamical composition differace btn. them

Answer / shyam shendur

EN8 also know as 080M40. An unalloyed medium carbon steel. EN8 is a medium strength steel, good tensile strength. Suitable for shafts, stressed pins, studs, keys etc.
Available as normalised or rolled. EN8 is supplied as round drawn/turned, round hot rolled, hexagon, square, flats and plate
EN24 also known as 817m40 comes treated in the T condition to 850/1000 N/mm2 we can offer EN24T in plate from 10mm thick up to 300mm, diameters from 10mm up to 950mm, squares from 20mm to 300mm and flats 20 x 10 up to 3000 x 300mm from stock. AISI 4340, werkstoff 1.6565.

Answer / abhishek singhania

The above answer is a layman's answer. Can someone give a
litle more specfic anwers. Like what are the applicational
differences or maybe difference in their mechanical
properties or something?

Answer / k.laxmanrao

why are useing in en24 in all motor shafts.if iam useing
en8 what problem faceing.

Answer / kiriti m. bhattacharya

Shafts require high fatigue resistance because the slightest misalignment can cause a micro"wobble" - enough to start a fatigue crack on the surface or any other high tensile area, or a notches (stress concentration point). The idea is to find a machinable steel round bar which can then be heat treated: heat, quench (in oil) and tempered. What mechanical properties you end up with depends on the alloy additions (different EN numbers) and the post fabrication heat treatment.
So, to answer your question: First decide what mechanical properties your design requires; secondly, check which EN steel will meet your requirements. The En24 and En 26 are the "work-horses" for shafts and higher temperature bolting. In AISI terms: AISI 4140 and AISI 4340. It can be misleading just to speak about "shafts" without knowing the required service conditions. Hope this helps.

why spur gear making noise douring running, why spur gear teeth get crack, what is the effect of heat treatment on spur gear how to reduce the noise bet gear

1 Answers  

Why earthing is required for electric equipment Answers: 1.For human protection,2.For euipment protection,3.both,4.None

15 Answers   Bhel,

which cycle used in diesel engine

10 Answers   Aster Teleservices,

In which reactor the coolant and moderator are the same ?

0 Answers  

which fit is this 177-S6?

0 Answers  

What is the name given to ratio of actual cycle efficiency and ideal cycle efficiency?

0 Answers  

why we can't use carnot cycle in steam power plant?

3 Answers  

What are the causes of dirty lubricating oil?

0 Answers   RRB,

wat's diff b/w normal braek system and (ABS) anti braek system.

2 Answers   Toyota,

Is your basic salary of $...... , good for you if employed?In case of any eventuailt,who is your next of kin?

0 Answers  

What are the advantages of dtsi over normal engines?

0 Answers  

25 questions in 25 minutes were asked by L&T corein mechanical engg test on 28 nov 2011 are as follows:- L&t mechanical consists of 1> airfuel ratio 2> mollier chart for flow rate 3>homogeneous or hetreogeneous mixture 4>sublimation curve 5>effect on room temperature when fridge is opened 6>cop of refrigerator 7> punching and piercing uses shear or not 8>method not used for tapering 9>forming method not used for productn 10>numerical regardng no.of cuts 11>flow of chip is controlled by which parameters 12> property important for impact loading 13>stifness of spring when it is cut into 2 pieces 14> device reqd for energy fluctuation 15> property on which rivet is selected 16>crowning to prevent flat belt pulley errors like undercut 17>cavitation occurs at which stage 18>qstn regardng inventory control 19>for ship vessel industry what sort of plantlayout reqd 20>value engg definition 21> qstn on how the extnsn occurs for uniform loading 22> qstn regardng stress actng on the shaft23>maximum value of mohr's circle diameter 24>qstn regardng meshing of teeth 25>qstn on helical gear reqrd better read G.K.PUBLISHERS GATE PAPERS ESPECIALLY FROM 1993 to 2003 ESPECIALLY THEORY QUESTIONS RATHER THAN NUMERICAL QUESTIONS

0 Answers   L&T,