|
SAE
& ASTM Bolt Grade Identification
Marks
and Mechanical Properties |
| Bolt
Grade Identification Marking |
Specs |
Nominal
Size
(inch) |
Proof
Load Stress
(ksi) |
Tensile
Strength
(min ksi) |
Material
Notes
|
 |
SAE
Grade 1 |
1/4
to 1 1/2 |
33 |
60 |
1 |
| SAE
Grade 2 |
1/4
thru 3/4 |
55 |
74 |
| over
3/4 thru 1-1/2 |
33 |
60 |
| ASTM
A307 |
1/4
to 1 1/2 |
33 |
60 |
3 |
| SAE
Grade 4 |
1/4
to 1 1/2 |
65 |
115 |
2,a |
 |
SAE
- Grade 5 |
1/4
thru 1 |
85 |
120 |
2,
b |
| ASTM
A449 - Type 1 |
1
1/8 thru 1-1/2 |
74 |
105 |
| 1
3/4 thru 3 |
55 |
90 |
 |
SAE
- Grade 5.2 |
1/4
thru 1 |
85 |
120 |
4,
b |
 |
ASTM
A325 - Type 1 |
1/2
thru 1 |
85 |
120 |
2,
b |
|
1 1/8 to 1-1/2 |
74 |
105 |
 |
ASTM
A325 - Type 2 |
1/2
thru 1 |
85 |
120 |
4,b |
| 1
1/8 to 1-1/2 |
74 |
105 |
 |
ASTM
A325 - Type 3 |
1/2
thru 1 |
85 |
120 |
5,b |
| 1
1/8 to 1-1/2 |
74 |
105 |
 |
ASTM
A354 - Grade BC |
1/4
thru 2-1/2 |
105 |
125 |
5,b |
| 2-3/4 thru
4 |
95 |
115 |
 |
SAE
Grade 7 |
1/4
to 1 1/2 |
105 |
133 |
7,b |
 |
SAE
- Grade 8 |
1/4
thru 1-1/2 |
120 |
150 |
7,b |
| ASTM
A354 - Grade BD |
1/4
thru 1-1/2 |
120 |
150 |
6,b |
 |
SAE
- Grade 8.2 |
1/4
thru 1 |
120 |
150 |
4,b |
 |
ASTM
A490 - Type 1 |
1/2
thru 1-1/2 |
120 |
150 |
6,b |
 |
ASTM
A490 - Type 3 |
1/2
thru 1-1/2 |
120 |
150 |
5,b |
Material Notes
- Low or
Medium Carbon Steel
- Medium
Carbon Steel
- Low Carbon
- Low Carbon
Martensite
- Weathering
Steel
- Alloy
Steel
- Medium
Carbon Alloy
Treatment
-
a - cold
drawn
b -
quenched and tempered
|
|
