|
Grade
Identification
Marking
|
Specification
|
Material
|
Nominal Size
In.
|
Proof
Load
Stress
ksi
|
Hardness
Rockwell
|
|
Min
|
Max
|
|
No Mark
|
ASTM A563 - Grade 0
|
Carbon Steel
|
1/4 thru 1-1/2
|
69
|
B55
|
C32
|
|
ASTM A563 - Grade A
|
Carbon Steel
|
1/4 thru 1-1/2
|
90
|
B68
|
C32
|
|
ASTM A563 - Grade B
|
Carbon Steel
|
1/4 thru 1
|
120
|
B69
|
C32
|
|
over 1 thru 1-1/2
|
105
|
|
|
ASTM A563 - Grade C
|
Carbon Steel
May be Quenched
and Tampered
|
1/4 thru 4
|
144
|
B78
|
C38
|
|
|
ASTM A563 - Grade C3
|
Atmospheric
Corrosion
Resistant Steel
May be Quenched
and Tampered
|
1/4 thru 4
|
144
|
B78
|
C38
|
|
|
ASTM A563 - Grade D
|
Carbon Steel
May be Quenched
and Tampered
|
1/4 thru 4
|
150
|
B84
|
C38
|
|
|
ASTM A563 - Grade DH
|
Carbon Steel
Quenched
and Tampered
|
1/4 thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A563 - Grade DH3
|
Atmospheric
Corrosion
Resistant Steel,
Quenched
and Tampered
|
1/4 thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194 - Grade 1
|
Carbon Steel
|
1/4 thru 4
|
130
|
B70
|
--
|
|
|
ASTM A194 - Grade 2
|
Medium Carbon
Steel
|
1/4 thru 4
|
150
|
159
|
352
|
|
|
ASTM A194 - Grade 2H
|
Medium Carbon
Steel, Quenched
and Tempered
|
1/4 thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194 - Grade 2HM
|
Medium Carbon
Steel, Quenched
and Tempered
|
1/4 thru 4
|
150
|
159
|
237
|
|
|
ASTM A194 - Grade 4
|
Medium Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4 thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194 - Grade 7
|
Medium Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4 thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194 - Grade 7M
|
Medium Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4 thru 4
|
150
|
159
|
237
|
