| Grade Identification Marking |
Specification |
Material |
Nominal Size In. |
Proof Load Stress ksi |
Hardness Rockwell |
| Min |
Max |
 |
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 |
B69 |
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, Quenched and Tempered |
1/4 thru 4 |
144 |
B78 |
C38 |
 |
ASTM A563 Grade C3 |
Atmospheric Corrosioin Resistant Steel, Quenched and Tempered |
1/4 thru 4 |
144 |
B78 |
C38 |
 |
ASTM A563 Grade D |
Carbon Steel, Quenched and Tempered |
1/4 thru 4 |
150 |
B84 |
C38 |
 |
ASTM A563 Grade DH |
Carbon Steel, Quenched and Tempered |
1/4 thru 4 |
175 |
C24 |
C38 |
 |
ASTM A563 Grade DH3 |
Atmospheric Corrosioin Resistant Steel, Quenched and Tempered |
1/4 thru 4 |
175 |
C24 |
C38 |
|
ASTM A563 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 Steel, Quenched and Tempered |
1/4 thru 4 |
175 |
C24 |
C38 |
 |
ASTM A194 Grade 7 |
Medium Carbon Steel, Quenched and Tempered |
1/4 thru 4 |
175 |
C24 |
C38 |
 |
ASTM A194Grade 7M |
Medium Carbon Steel, Quenched and Tempered |
1/4 thru 4 |
150 |
159 |
237 |
