516 Gr 70 Toughness

[Makun]

Hi everyone, I'm looking for normal toughness in a 516 Gr 70 material. I want to know if the toughness has been changed his value since 1990. Anyone know? I searched in ASTM and ASME II but I couldn't find it.

Thanks!

 

[david339933]

Check out SA-20.

 

[DVWE]

It will all depend on the thickness and if it is normalized or not.

 

[metengr]

You mean your looking for actual toughness values but at what service temperature? The material should be supplied as fine grained and normalized for best toughness values.

 

[JStephen]

I wouldn't expect minimum required values to change, but average furnished values can change- as mills are upgraded, chemistry is tweaked, plate is made to meet dual specs, old mills shut down, new ones open, etc- that on top of normal variations from plate to plate or over the range of thicknesses furnished.

 

[weldstan]

I have seen absorbed impact energies of this material from < 15 ft-lbs to > 100 ft-lbs at -50 F; so I'm not sure what you're asking.

 

[Makun]

Thanks, I was making a rerate of a vessel with API 510 8.2, and in the flow chart ask if the toughness has changed. This confused me and I started looking requirment of the toughness for this material.

Regards to everyone