MATERIAL SPECIFICATIONS
For Grades 2, 5, 8, & A449, A354BD Externally Threaded Fasteners
Mechanical Requirements
Chemical Composition Requirements
Grade
Diameter
-
Reduction of area
(min.%)
Rockwell Hardness
C
Min.
Max.
P
S
Mn
Min.
Max.
Max.
2a.
1/4" thru 3/4"
>3/4" thru 1 1/2"
55,000
33,000
74,000
60,000
57,000
36,000
18
18
-
B80-B100
B70-B100
35
35
0.55
0.048
0.058
-
5
8
A449 Type
I
1/4" thru 1"
>1" thru 1 1/2"
1/4" thru 1 1/2"
1/4" thru 1"
>1" thru 1 1/2"
> 1 1/2 thru 3"
A354
BD
1/4" thru 2 1/2"
> 2 1/2"
85,000
74,000
120,000
85,000
74,000
55,000
120,000
105,000
120,000
105,000
92,000
81,000
14
14
35
35
150,000
130,000
12
35
C33-C39
C25-C34
C19-C30
120,000
105,000
90,000
92,000
81,000
58,000
14
14
14
35
35
35
150,000
140,000
130,000
115,000
14
14
40
40
C25-C34
C19-C30
B90-C22
C33-C39
C31-C39
0.28
0.55
0.55
0.28
0.25
0.25
0.25
1/4 - 1 1/2
0.28
0.55
>1 1/2
0.33
0.55
0.048
0.040
0.58
0.58
0.58
0.048
0.048
0.048
0.040
0.040
0.058
0.045
0.57
0.57
0.57
0.045
0.045
-
-
-
-
0.058
0.058
0.058
a. Applicable to full size product testing.
b. Applicable to machined specimen testing.
Table Of Grade Comparison
ASTM VS. SAE
Identification Grade Mark
Specification
Fastener
Description
Material
Nominal Size
Range (in.)
Mechanical Properties
Proof Load
(psi)
Yield Strength
Min. (psi)
Tensile Strength
Min. (psi)
1/4" thru 1 1/2
1/4" thru 4
1/4" thru
>3/4 to 1 1/2
1/4" thru 1
> 1 to 1 1/2
1/4" thru 1
> 1 to 1 1/2
> 1 1/2 thru 3
1/4" thru 1 1/2
SAE J429
Grade 1
ASTM A307
Grades A&B
SAE J429
Grade 2
SAE J429
Grade 5
ASTM A449
SAE J429
Grade 8
ASTM A354
Grade BD
Bolts
Screws
Studs
Bolts
Screws
Studs
Bolts
Screws
Studs
Low or Med. Carbon Steel
Low Carbon Steel
Low or Med. Carbon Steel
Med. Carbon Steel, Quenched
& Tempered
Med. Carbon Alloy, Quenched
& Tempered
Alloy steel Quenched
& Tempered
33,000
36,000
60,000
55,000
33,000
57,000
36,000
74,000
60,000
85,000
74,000
92,000
81,000
120,000
105,000
85,000
74,000
55,000
92,000
81,000
58,000
102,000
105,000
90,000
-
-
120,000
130,000
150,000
No grade markings
