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347 H Valve Material ?

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Valveusa

Petroleum
Joined
Mar 18, 2013
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10
Location
US
What is the difference 347H - 347 Valve body material?
 
347H has higher limits on Carbon (and higher tensile strenght, I believe).

rp
 
Actually H has a min on the C, so that it has to be high carbon.
The alloy is slightly stronger, but has significantly higher creep strength.

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Plymouth Tube
 
The 347H has higher creep strength.
 
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