ASTM and SAE Specifications

ASTM and SAE
Specifications, Proof Loads, Tensile Strengths
Grade Marking Specification Material Bolt and Screw
Size (Inches)
Proof Load
psi
Tensile Strength
min. psi
SAE Grade 1
ASTM A307
SAE Grade 2
Low Carbon Steel
Low Carbon Steel
1/4 thru 1-1/2
1/4 thru 1-1/2
Over 1-1/2 thru 4
1/4 thru 3/4
Over 3/4 thru 1-1/2
33000
33000
....
55000
33000
60000
60000
55000
74000
60000
SAE Grade 3 Med. Carbon Steel
Cold Worked
1/4 thru 1/2
Over 1/2 thru 5/8
85000
80000
110000
100000
SAE Grade 5
ASTM  A449
Med. Carbon Steel
Quenched and
Tempered
1/4 thru 1
Over 1 thru 1-1/2
1/4 thru 1
Over 1 thru 1-1/2
Over 1-1/2 thru 3
85000
74000
85000
74000
55000
120000
105000
120000
105000
90000
ASTM A325 Med. Carbon Steel
Quenched and
Tempered
1/2, 5/8, 3/4
7/8, 1
1-1/8 thru 1-1/2
85000
78000
74000
120000
115000
105000
ASTM A354
Grade BB
Low Alloy Steel
Quenched and
Tempered
1/4 thru 2-1/2
Over 2-1/2 thru 4
80000
75000
105000
100000
ASTM A354
Grade BC
Low Alloy Steel
Quenched and
Tempered
1/4 thru 2-1/2
Over 2-1/2 thru 4
105000
75000
125000
100000
SAE Grade 5.1 Low or Med
. Carbon
Steel Quenched
and
Tempered with
Assembled Lock
Washer
Up to 3/8 incl. 85000 120000
SAE Grade 7 Med. Carbon Alloy
Steel Quenched
and
Tempered. Roll
Threaded after
Heat
Treated
1/4 thru 1-1/2 105000 133000
SAE Grade 8
ASTM A354
Grade BD
Med. Carbon Alloy
Steel, Quenched
and
Tempered
Alloy Steel
Quenched
and Tempered
1/4 thru 1-1/2 120000 150000
ASTM A490 Alloy Steel,
Quenched and
Tempered
1/2 thru 2-1/2
Over 2-1/2 thru 4
120000
105000
150000
140000
 
ASTM Specifications:
A 307: Low Carbon Steel Externally and Internally Threaded Standard Fasteners
A 325: High Strength Steel Bolts for Structural Steel Joints, including Suitable Nuts and Plain Hardened Washers
A 449: Quenched and Tempered Steel Bolts and Studs
A 354: Quenched and Tempered Alloy Steel Bolts and Studs with Suitable Nuts
A 490: High Strength Alloy Steel Bolts for Structural Steel Joints, including Suitable Nuts and Plain Hardened Washers
SAE Specification:
J 429c: Mechanical and Quality Requirements for Threaded Fasteners