A449 vs A325
| Grade Marking |
Specification |
Material and Treatment |
Nominal Size (In.) |
Mechanical Properties |
Hardness Rockwell |
| Proof
Load
Min
(ksi) |
Yield
Strength
Min
(ksi) |
Tensile
Strength
Min
(ksi) |
Elong % Min [9] |
RA % Min [10] |
Min |
Max |
 |
A325
Type 1 |
Medium Carbon Steel, Q & T |
1⁄2" - 11⁄2" |
85 |
92 |
120 |
14 |
35 |
C25 |
C34 |
 |
A325
Type 3 |
Atmospheric Corrosion Resistant Steel,
Q & T |
 |
A449
Type 1 |
Medium Carbon Steel, Q & T |
1⁄4" - 1" |
85 |
92 |
120 |
14 |
35 |
C25 |
C34 |
| 11⁄8" - 11⁄2" |
74 |
81 |
105 |
C19 |
C30 |
| 15⁄8" - 3" |
55 |
58 |
90 |
B91 |
B100 |
 |
A449
Type 3 |
Weathering Steel, Q & T |
1⁄4" - 1" |
85 |
92 |
120 |
14 |
35 |
C25 |
C34 |
| 11⁄8" - 11⁄2" |
74 |
81 |
105 |
C19 |
C30 |
| 15⁄8" - 3" |
55 |
58 |
90 |
B91 |
B100 |
