19
Specification
Material
Size Range
(inches)
Min. Proof
Strength
(psi)
Min. Tensile
Strength
(psi)
Min. Yield
Strength
(psi)
Grade
Identification
Marking
Low or Medium
Carbon Steel
Grade 2
1/4 to 3/4
7/8 to 1
-
1/2
55,000
33,000
74,000
60,000
57,000
36,000
Grade 5
Medium Carbon
Steel: Quenched
and Tempered
1/4 to 1
1
-
1/8 to 1
-
1/2
85,000
74,000
120,000
105,000
92,000
81,000
Grade 8
Medium Carbon
Alloy Steel:
Quenched and
Tempered
1/4 to 1
-
1/2
120,000
150,000
130,000
