ASTM A615 Reinforcement bar A615-75 Grade Steel
What is A615-75 Grade Steels? A615-75 grade steel is a structural billet steel for structural applications. A615-75 grade is a material grade and designation defined in ASTM A615 standard. ASTM A615 is an international material standard for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement for strengthening application. A615-75 grade Steel is higher in strength as compare to A615-60 steel.
Dimensional Characteristics of A615-75 Grade Steels: The applicable diameter for this A615-75 GRADE material as defined in the ASTM A615 ranges to 19.1-22.2 mm. The perimeter is usually around 59.869.8 mm. The cross sectional area is about 284-387 mm2.
The Chemical Composition of A615-75 Grade Steels: ASTM A615 defines the chemical composition of A615-75 Grade steels as under:
Only Maximum percentage of Phosphorous (P) is identified by the standard i.e. 0.060
Remaining is iron (Fe) percentage and with few other alloys and negligible impurities.
Mechanical Properties of A615-75 Grade Steels: The tensile strength of the A615-75 Grade Steels is expressed in Newton per millimeters and it must be at-least 689 N/mm2 (MPa). The yield strength is minimum 517 N/mm2 (MPa). The minimum percentage ranges for elongation is 6% thicknesses.
The capability to meaningfully decrease cost is motive alone to stipulate Grade 75 reinforcing steel. Additional benefits comprise condensed congestion and, for pillars and shear wall chord reinforcing, the option of rarer column ties due to fewer vertical bars. From a sustainability viewpoint, there are also environmental remunerations for example less steel utilized equals rarer carbon emissions by utilizing Grade 75. Experts say a time will come that A615-60 steel will be replaced completely by A615-75 steel.
AboutEngr. Ali Alvi
Engineer Ali Alvi is an industrial engineer who has post graduated from the NED University, then completed his Masters in Industrial Engineering from the University of Ontario. He has also served as an engineer in International Steel Ltd as A Cold rolling mill engineer.
Dear Sir, I would like to know where grade 75 used? Is it used on constructing bridges. Your kind response will be highly appreciated. Thanking you, Regards Manoj, Saudi Arabia
It is often used for structural reinforcements. It is also used as anchoring for wind turbines.
Please advise me how should be the tolerances to evaluate the Tensile strength and yield strength.
Testing a bar 40mm, we got 518.8 MPa for yield strength, and 725.9 MPa for Tensile.
Are that acceptable?