Impact values on Hastelloy C276 cast steel CW12MW
Impact values on Hastelloy C276 cast steel CW12MW
(OP)
Dear All,
we have produced one sand cast body acc. ASTM A494 CW12MW (corrispondent of Hastelloy C276); it's a pressure containing part, therefore customer requested us to carry out an impact test at T=room (not requested by ASTM A494), guaranteeing 27J minimum.
Now, we have carried out the tests, finding 8% elongation (4% minimum required by ASTM) and impact test 14-12-11J (much lower than additional request of 27J made by customer).
Practically speking, my impression is that a material whose minimum elongation is 4% will hardly be able to achieve an impact value higher than 27J, but I would like your opinion on the matter.
Thank you in advance for your help
BR
Marco
we have produced one sand cast body acc. ASTM A494 CW12MW (corrispondent of Hastelloy C276); it's a pressure containing part, therefore customer requested us to carry out an impact test at T=room (not requested by ASTM A494), guaranteeing 27J minimum.
Now, we have carried out the tests, finding 8% elongation (4% minimum required by ASTM) and impact test 14-12-11J (much lower than additional request of 27J made by customer).
Practically speking, my impression is that a material whose minimum elongation is 4% will hardly be able to achieve an impact value higher than 27J, but I would like your opinion on the matter.
Thank you in advance for your help
BR
Marco





RE: Impact values on Hastelloy C276 cast steel CW12MW
I would suspect you have a quality problem with these sand castings. I do agree that your properties will be much lower for the casting form in comparison to wrought product form, but I would believe you should easily reach 27 J at RT.
Look at casting quality and check thermal treatment that was performed for the sand casting.
RE: Impact values on Hastelloy C276 cast steel CW12MW
RE: Impact values on Hastelloy C276 cast steel CW12MW
Have these been solution annealed?
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Plymouth Tube
RE: Impact values on Hastelloy C276 cast steel CW12MW
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"The richer we have become materially, the poorer we have become morally and spiritually." Martin Luther King Jr
RE: Impact values on Hastelloy C276 cast steel CW12MW
We will keep investigating.
Marco