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[MW:22680] RE: 22679] Lateral Expansion - High Alloy Impact test

By Materials & Welding
Saravanan,
 
Lateral expansion is a measure of ductility in addition to absorbed impact energy(impact values). Austenitic alloys always fail in ductile mode , with very high impact strength. Higher the ductility more is the LE. As these alloys have an inherent ductile nature , causing high impact values, the other way screen them is though lateral expansion.
 
Please see the links below and also ASTM/ASME -A/SA-370.
 
Thanks
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
pgoswami@quickclic.net
pradip.goswami@gmail.com
http://ca.linkedin.com/pub/pradip-goswami/5/985/299
 
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Saravanan Sornam
Sent: Tuesday, January 06, 2015 2:58 AM
To: materials-welding@googlegroups.com
Subject: [MW:22679] Lateral Expansion - High Alloy Impact test

Dear Metallurgists ,

Could you please explain that,

why lateral expansion value of Min. 0.38 mm given in ASME Sec VIII Div I , UHA-51 for Charpy Impact Tests, instead of Joule Value for High Alloy steels like Duplex, Super Duplex etc.

What is the significance of Lateral expansion for such High Alloys.

Regards,
Saravanan.

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