Clarification of ASTM A961/A 961M section 6.1.1
Clarification of ASTM A961/A 961M section 6.1.1
(OP)
In A961/A 961M section 6 refers to the materials that may be used to manufacture product conforming to this specification.
In 6.1.1 Bar is permissable on hollow cylindrical shaped parts up to, and including, NPS 4; provided that the axial length of the part is parallel to the metal flow lines of the starting stock.
Does this standard then allow me to use CR and/or HR material in replacement of a forging if my part is cylindrical and parallel to the flow lines of the stock?
Phil86
In 6.1.1 Bar is permissable on hollow cylindrical shaped parts up to, and including, NPS 4; provided that the axial length of the part is parallel to the metal flow lines of the starting stock.
Does this standard then allow me to use CR and/or HR material in replacement of a forging if my part is cylindrical and parallel to the flow lines of the stock?
Phil86





RE: Clarification of ASTM A961/A 961M section 6.1.1
I would use hot rolled bar. Cold rolled bar may not produce the necessary flow lines thru thickness that are required per this specification. Keep in mind that if I was the customer, I would enforce Supplementary Requirement S50, the Macroetch test to assure parallel flow lines from rolling.