Directorio de PRODUCTOS INDUSTRIALES en los Estados Unidos merged | Page 2

Grade Markings For Steel Bolts & Screws
Mechanical Requirements
Grade
Designation
ASTM A307
Gr. A
Nominal Size
of Product in.
1/4 to 4
SAE Gr. 1 1/4 to 1-1/2
SAE Gr. 2 1/4 to 3/4
SAE Gr. 5 1/4 to 1
1-1/8 to
1-1/2
ASTM A449
Type 1 1/4 to 1
1-1/8
to 1-1/2
1-3/4 to 3
ASTM A325
Type 1 1/2 to 1
1-1/8 to
1-1/2
SAE Gr. 5.2 1/4 to 1
ASTM A449
Type 2 1/4 to 1
SAE Gr. 8
ASTM A354
Gr. BD
Proof
Load
Stress ksi Yield
Strength
ksi Min Tensile
Strength
ksi Min
–– –– ––
1/2 to 1
1-1/8 to
1-1/2
2-3/4 to 4
Core
Max 60 –– B69 B100 307A
–– 60 min 100
max –– B69 B95 307B
33 36 60 –– B70 B100 None specified
55 57 74 –– B80 B100 None specified
85
74 92
81 120
105 30N54
30N50 C25
C19 C34
C30 92
81
58 120
105
90 –– C25
C19
B91 C34
C30
B100 85
74 92
81 120
105 –– C24
C19 C35
C31 low carbon boron steel;
the product is quenched
and tempered 85 92 120 30N56 C26 C36 85 92 120 –– C25 C34 atmospheric corrosion
resistant steel;
the product is quenched
and tempered 85 92 120 –– C24 C35 74 81 105 –– C19 C31 120 130 150 30N58.6 C33 C39 120 130 150 –– C33 C39 105 115 140 –– C31 C38 120 130 150 min
170 max –– C33 C38
low or medium carbon
steel
low of medium carbon
steel, cold worked
medium carbon steel;
the product is quenched
and tempered
medium carbon alloy steel;
the product is quenched
and tempered
85
74
55
ASTM A490
Type 1 1/2 to 1-1/2 SAE Gr. 8.2 1/4 to 1 low carbon boron steel;
the product is quenched
and tempered 120 130 150 30N58.6 C33 C39
ASTM A490
Type 3 1/2 to 1-1/2 atmospheric corrosion
resistant steel; the product
is quenched and tempered 120 130 150 min
170 max –– C33 C38
140 –– 180 –– C39 C45
135 –– 170 –– C37 CC45
ASTM A574
0.060 to 1/2
Over 1/2
Grade Identification
Marking
Min
1/4 to 1-1/2
1/4 to 2-1/2
Product, Hardness, Rockwell
Surface
Max
1/4 to 4
ASTM A307
Gr. B
ASTM A325
Type 3
Material and Treatment
fine grain alloy steel
product is quenched and
tempered
A325
A325
BD
A490
A490
None Specified
Information presented is for general reference and informational purposes only. Information presented is believed to be accurate at the time of document creation. However Global Industrial is not responsible for any claim traceable to any errors
(typo or otherwise) as contained herein. Global Industrial makes no warranties as to the accuracy of this information found in public circulation.
Super Industrial
On the web at www.edanaro.com www.superindustrialonline.com
Call 678 221 4162