Rationale

Referring to the melt practice stipulated in certain A01 standards, the terms “killed steed” and “fully killed steel” are both used. Standard A941 provides a definition of “killed steel”, but not of “fully killed steel”. This is creating confusion in the industry as witnessed by several inquiries received concerning alleged non-conforming material where the ASTM standard states “fully killed” yet the test report states “killed”. It is common in the steel-making industry that “killed” and “fully killed” are used interchangeably. Indeed, the seminal publication, “The Making, Shaping and Treating of Steel”, Ninth Edition published by United States Steel devotes a section (Section 2) to ingot structures. In this section, the terms “killed” and “fully killed” are used interchangeably. Therefore, it is proposed to add a discussion to the definition of “killed steel” in A941 to explain that “killed steel” and “fully killed steel” have the same definition.