Mechanical Property References

SAE
Grade
Diameter
(in)
Proof
Strength
(ksi)
Minimum
Tensile
Strength
(ksi)
Rockwell
Hardness
Material and
Heat Treatment
Grade 2 0.25 - 0.75
0.75 - 1.5
55
33
74
60
B80 - B100
B70 - B100
Low or medium carbon steel
Grade 5 0.25 - 1
1- 1.5
85
74
120
105
C25 - C34
C19 - C30
Medium carbon steel, quenched and tempered
Grade 8 0.25 - 1.5 120 150 C33 - C39 Medium carbon alloy steel, quenched and tempered

from http://www.incomsupply.com/customers/specdata/cap.html

 
from Mechanical Engineering Design, 5th Ed., by J.E. Shigley and C.R. Michke, McGraw-Hill, 1989, p348

 

SAE Specifications for Steel Bolts

 
SAE
Grade
No.
Size
Range
(in)
Minimum
Proof
Strength
(ksi)
Minimum
Yield
Strength
(ksi)
Minimum
Tensile
Strength
(ksi)
Material Head
Marking
1 0.25 - 1.5 33 36 60 Low or medium carbon
2 0.25 - 0.75
0.875 - 1.5
55
33
57
36
74
60
Low or medium carbon
4 0.25 - 1.5 65 100 115 Medium carbon, cold-drawn
5 0.25 -  1
1.125 - 1.5
85
74
92
81
120
105
Medium carbon, Q&T
5.2 0.25 - 1 85 92 120 Low-carbon martensite, Q&T
7 0.25 - 1.5 105 115 133 Medium-carbon alloy, Q&T
8 0.25 - 1.5 120 130 150 Medium-carbon alloy, Q&T
8.2 0.25 - 1 120 130 150 Low-carbon martensite, Q&T

from Mechanical Engineering Design, 5th Ed, by Shigley & Mischke, McGraw-Hill, 1989, p 341

 

ASTM Specifications for Steel Bolts

 
ASTM
Designation
No.
Size
Range
(in)
Minimum
Proof
Strength
(ksi)
Minimum
Yield
Strength
(ksi)
Minimum
Tensile
Strength
(ksi)
Material Head
Marking
A307 0.25 - 1.5 33 36 60 Low carbon
A325, type 1 0.5 - 1
1.125 - 1.5
85
74
92
81
120
105
Medium carbon, Q&T
A325, type 2 0.5 - 1
1.125 - 1.5
85
74
92
81
120
105
Low-carbon martensite, Q&T
A325, type 3 0.25 -  1
1.125 - 1.5
85
74
92
81
120
105
Weathering steel, Q&T
A354, grade BC         Alloy steel, Q&T
A354, grade BD 0.25 - 4 120 130 150 Alloy steel, Q&T
A449 0.25 - 1
1.125 - 1.5
1.75 - 3
85
74
55
92
81
58
120
105
90
Medium carbon, Q&T
A490, type 1 0.5 - 1.5 120 130 150 Alloy steel, Q&T
A 490, type 3         Weathering steel, Q&T

from Mechanical Engineering Design, 5th Ed, by Shigley & Mischke, McGraw-Hill, 1989, p 342.  Refer to ASTM F1077 for more details.

 

Metric Mechanical-Property Classes for Steel Bolts, Screws, and Studs*

 
Property
Class
Size
Range
Minimum
Proof
Strength
(MPa)
Minimum
Yield
Strength
(MPa)
Minimum
Tensile
Strength
(MPa)
Material Head
Marking
4.6 M5-M36 225 240 400 Low or medium carbon
4.8 M1.6-M16 310 340 420 Low or medium carbon
5.8 M5-M24 380 420 520 Medium carbon, cold-drawn
8.8 M16-M36 600 660 830 Medium carbon, Q&T
9.8 M1.6-M16 650 720 900 Low-carbon martensite, Q&T
10.9 M5-M36 830 940 1040 Medium-carbon alloy, Q&T
12.9 M1.6-M36 970 1100 1220 Medium-carbon alloy, Q&T

from Mechanical Engineering Design, 5th Ed, by Shigley & Mischke, McGraw-Hill, 1989, p 343

*The thread length for bolts and cap screws is LT = 2d+6 for L<125, 2d+12 for 125<L<200, 2d+25 for L>200 where L is the bolt length.  The thread length for structural bolts is slightly shorter than given above.