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ASTM A182 F51 forging Ratio and Which ASTM examination method to reveal material flow line

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CTTEE

Materials
Apr 23, 2012
5
In general, standard minimum forging ratio is 3:1 for open-die forging method.
Forger actual performed base on ratio 5.5:1 on F51 forging of valve component(closure).
How does this forging ratio leads to the better material flow lines ?

How & what checks are performed to see whether the material flow lines conform approximately to the final shape of forging (eg.valve component-closure)?

Which ASTM standard to be used to examine material flow line of A182 F51 ?
ASTM E381 or E340 is the right standard ?)

Appreciate expert's advice.
Thank you.
 
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ASTM E340 is the correct standard for a forging. ASTM E381 is for billets and other products with a cast structure.
 
Forger actual performed base on ratio 5.5:1 on F51 forging of valve component(closure).
How does this forging ratio leads to the better material flow lines

A higher forging ratio breaks up the original cast/dendritic structure and any inclusions resulting in more benefical flow lines.
 
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