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Minimum Yield Strength Levels of Steel Bars

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Minimum Yield Strength Levels of Steel Bars

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Questions and Answers

What are the minimum yield strength levels for bars?

30,000 psi (210 MPa), 50,000 psi (350 MPa), 70,000 psi (480 MPa), and 90,000 psi (620 MPa)

35,000 psi (240 MPa), 55,000 psi (380 MPa), 70,000 psi (480 MPa), and 85,000 psi (590 MPa)

45,000 psi (310 MPa), 65,000 psi (450 MPa), 80,000 psi (550 MPa), and 95,000 psi (660 MPa)

40,000 psi (280 MPa), 60,000 psi (420 MPa), 75,000 psi (520 MPa), and 80,000 psi (550 MPa) (correct)

What are the grade designations for the minimum yield strength levels?

Grade 40, Grade 60, Grade 75, and Grade 80 (correct)

Grade A, Grade B, Grade C, and Grade D

Grade 30, Grade 50, Grade 70, and Grade 90

Grade I, Grade II, Grade III, and Grade IV

What size range of plain bars can be ordered under this specification?

Up to and including 2 inches (50.8 mm) in diameter

Up to and including 1 inch (25.4 mm) in diameter

Up to and including 1.5 inches (38.1 mm) in diameter

Up to and including 2.5 inches (63.5 mm) in diameter (correct)

What form can the plain bars be ordered in?

Coils or cut lengths Signup and view all the answers

For plain bars, which properties are not applicable?

Deformations and marking Signup and view all the answers

What method is used to determine the yield strength when the steel does not have a well-defined yield point?

The offset method (0.2% offset) Signup and view all the answers

What is the minimum stress corresponding to a tensile strain of 0.0035 for Grade 60 steel?

60,000 psi [420 MPa] Signup and view all the answers

What is the purpose of the second tensile test result mentioned in the text?

To confirm the material conforms to the additional requirement Signup and view all the answers

What is the minimum stress corresponding to a tensile strain of 0.0035 for Grade 80 steel?

80,000 psi [550 MPa] Signup and view all the answers

What is the purpose of determining the yield point or yield strength?

To ensure the material conforms to the requirements for tensile properties Signup and view all the answers

What is the method used to determine the yield point when the steel has a sharp-kneed or well-defined type of yield point?

The drop or halt of the gage of the tensile testing machine Signup and view all the answers