Hello !
Could anybody explain :
Why ASTM A837 (Standard Specification for
Steel Forgings, Alloy, for Carburizing Applications) quantifies BHN 229 as the maximum hardness for forgings to be carburized (see section 7.1.1)?
I believe it`s because such a hardness level provides better toughness...
Hello :
Does anybody know the effect of high temperature application (80-90 C)OF BRONZE ALLOY C93800 used as bushing material ?
Note ; A synthetic lubricant will be used to keep the temperature range under control.
Thanks for the tip "metengr" , and by the way , I found the statement I was looking for on ASM - Handbook - vol. 15 (Castings) - PAGE 714 (9TH EDITION).
Correct.
It is tempering "minus" 20 C. In that case : 570 - 20 = 550 C.
Now , back to my question :
Are you aware of any literature where such rule can be found in writing.
We successfully use it for years ; however , I need to convince him that such a practice is reliable.
Pre heat - 120 / 150 C
Filler metal - AWS E7018
Casting thickness - it varies from 2 up to 4 inches
S.R temperature 550 C ( TEMPERED AT 570 C ).
NDT - WELDMENTS ARE M.T`d before and after S.R / after S.R weldments are randomly selected for traverse HB via EQUOTIP to make sure that the H.A.Z...
Dear All ;
I need to prove to my customer that :
(Tempering temperature - 20 C) , is an acceptable temperature to be used on stress relieving cycles for weld repairs in castings. Would you please reference a literature for that , so I can substantiate my statement ...
Hello All ;
Have you ever seen a 4 - leg - yoke being used on magnetic particle test ?
If "yes" , is it acceptable and / or recognized by any Standard or Code ?
To my knowledge , the magnectic field created by a 4-leg - yoke is neither longitudinal , nor circular , and US does not make use of...
Hello :
Is there any equation which could be used to evaluate tensile strength of bronze castings (alloys: C93700 & C93800) through its correlation to the hardness value like in steel ?
