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Common Bar Grades

ASTM A615

 

 

Grade Yield (psi) Tensile (psi)

40

40,000

60,000

60 60,000 90,000
80 80,000 105,000

 

 


ASTM A706

 

 

 

Grade Yield (psi) Tensile (psi)
60 60,000 80,000
80 80,000 100,000

 

 


ASTM A1035

 

 

Grade Yield (psi) Tensile (psi)
100 100,000 120,000
120 120,000 150,000

 

 

Reinforcing Bar Grade Designations

In the United States, the size and grade designations of these carbon (or "mild") steel bars used to reinforce concrete are set by ASTM International. Besides mild steel, rebar is also produced in stainless steel and other specialty alloys. Included in ASTM bar specifications are carbon steel bars with epoxy and/or zinc coatings used to resist corrosion.

Rebar is available in Grades and specifications that vary in yield strength, tensile strength, chemical composition, and percentage of elongation.

The Grade designation is equal to the minimum yield strength of the bar in ksi (1000 psi) for example Grade 60 rebar has a minimum yield strength of 60 ksi. Rebar is typically manufactured in Grades 40, 60, 75, 80, and 100.

Current ASTM Bar Specifications include:

ASTM A615/A615M: Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM A706/A706M: Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement

ASTM A767/A767M: Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement

ASTM A775/A775M: for Epoxy-Coated Reinforcing Steel Bars

ASTM A934/A934M: Epoxy-Coated Prefabricated Steel Reinforcing Bars

ASTM A955/A995M: Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement

ASTM A996/A996M: Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement

ASTM A1035/A1035M: Deformed and Plain, Low-carbon, Chromium, Steel Bars for Concrete Reinforcement

 

Source

CRSI Manual of Standard Practice - 2009 Edition - get the guide now


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