This is a description of the ASTM A615 specification that is listed on the Spec that Woody posted. While the mill test report has a chemistry for the heat, notice that a chemistry is NOT specified in the specification; the strength level IS specified. I can report the chemistry of a garbage can lid but that does not imply that it was made to any particular chemistry specification, only that the chemistry of the heat used to make the garbage can lid has the chemistry reported. The spec references the AISI and SAE specifications for ALLOY steel bars but note that they must meet the "other" requirements of the ASTM spec, which is the STRENGTH requirments. The material in the MTR posted appears to conform to the Grade 75. Also, note that the sulfur reported on the MTR is .067!!!! Modern steel making can easily achieve .003% so this heat can be expected to be full of inclusions, ie, dirty.
ASTM A615/A615M-08b
Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
1.1 This specification covers deformed and plain carbon-steel bars for concrete reinforcement in cut lengths and coils. Steel bars containing alloy additions, such as with the American Iron and Steel Institute and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1. The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification.
1.2 Bars are of three minimum yield strength levels: namely, 40 000 [280 MPa], 60 000 [420 MPa], and 75 000 psi [520 MPa], designated as Grade 40 [280], Grade 60 [420], and Grade 75 [520], respectively.
1.3 Plain bars, in sizes up to and including 2