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I suggest you to contact the following steel mill plants in Brazil : 1. USIMINAS 2. ACESITA Those are reliable SS producers.

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...

Thanks metengr !

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...

OOOOOPS ! SHAME ON ME ! THANKS FOR YOUR GOOD MEMORY.

Hi metengr ! ASTM A 27 GRADE 70/40 Normalized and tempered on a furnace car , and stress relieved after welding repair via SMAW or FCAW.

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...

Thank you very much metengr !

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 ?

THANK YOU VERY MUCH kenvlach

O.K - THANKS again metengr.

Answer : GEARS !

MORE QUESTIONS ON THAT THREAD : A. Am I correct if I say that the only difference between the 2 Stds. is that 290 applies for ring forgings only ? B. And if the above-mentioned question is true , what would be the difference in designing a forging based on the technical attributes of either...

Understood. Thanks.

Thanks metengr. Does it mean that regardless the thickness of my forging , I can only estimate mechanical properties through the HB figures ?

Hello : ASTM A 291 establishes either a diameter or thickness range for the mechanical properties on table 3 for the different classes of steel. However , ASTM A 290 doesn`t. Question : For what thickness and/or diameter range can I use the mechanical properties of ASTM A290 - table 3 ...