|
Standar for Bolt |
Grade |
Bolt Size |
Tension Stength |
Yield Strength |
Enlogation |
Reduction of Area |
Hardness |
Head Marking |
|
|
in. |
ksi |
ksi |
min% |
min% |
Brinell |
Rockwell |
|||
|
A193/A193M |
B5 |
to 4 |
100min |
80min |
16 |
50 |
/ |
/ |
|
|
B6 |
to 4 |
110min |
85min |
15 |
50 |
/ |
/ |
|
|
|
B6X |
to 4 |
90min |
70min |
16 |
50 |
/ |
C26 |
|
|
|
B7 |
to 2-1/2 |
125min |
105min |
16 |
50 |
/ |
C35 |
|
|
|
over 2-1/2 to 4 |
115min |
95min |
16 |
50 |
|||||
|
over 4 to 7 |
100min |
75min |
18 |
50 |
|||||
|
B7M |
to 4 |
100min |
80min |
18 |
50 |
235 |
B99 |
|
|
|
over 4 to 7 |
100min |
75min |
18 |
50 |
235 |
B99 |
|||
|
Class 1: |
all |
75min |
30min |
30 |
50 |
223 |
B96 |
|
|
|
B16 |
to 2-1/2 |
125min |
105min |
18 |
50 |
321 |
C35 |
|
|
|
over 2-1/2 to 4 |
110min |
95min |
17 |
45 |
321 |
C35 |
|||
|
over 4 to 7 |
100min |
85min |
16 |
45 |
321 |
C35 |
|||
|
Class 2:B8M |
to 3/4 |
110min |
96min |
15 |
45 |
321 |
C35 |
|
|
|
over 3/4 to 1 |
120min |
80min |
20 |
45 |
321 |
C35 |
|||
|
over 1 to 1-1/4 |
110min |
95min |
25 |
45 |
321 |
C35 |
|||
|
over 1-1/4 to 1-1/2 |
100min |
85min |
30 |
45 |
321 |
C35 |
|||
ASTM A193/A193M Mechanical Requirements
|
Grade and Class |
Diameter in. |
Tensile Strength ksi |
Yield Strength 0.2% Offset ksl |
Elongation in 4D min, % |
Reduction of Area min, % |
Hardness Max |
|
|
Min |
Min |
Min |
Min |
Brinell |
Rockwell |
||
|
B7 |
TO 2-1/2 |
125 |
105 |
16 |
50 |
|
C35 |
|
over 2-1/2 to 4 |
115 |
95 |
16 |
50 |
|
C35 |
|
|
over 4 to 7 |
100 |
75 |
18 |
50 |
|
C35 |
|
|
B7M |
to 4 incl. |
100 |
80 |
18 |
50 |
235 |
B99 |
|
over 4 to 7 |
100 |
75 |
18 |
50 |
235 |
B99 |
|
|
B16 |
TO 2-1/2 |
125 |
105 |
18 |
50 |
321 |
C35 |
|
over 2-1/2 to 4 |
110 |
95 |
17 |
45 |
321 |
C35 |
|
|
over 4 to 7 |
100 |
85 |
16 |
45 |
321 |
C35 |
|
|
Class 2:B8M, B8MN |
to 3/4 |
110 |
96 |
15 |
45 |
321 |
C35 |
|
over 3/4 to 1 incl. |
100 |
80 |
20 |
45 |
321 |
C35 |
|
|
over 1 to 1-1/4 incl. |
95 |
65 |
25 |
45 |
321 |
C35 |
|
|
over 1-1/4 to 1-1/2 incl. |
90 |
50 |
30 |
45 |
321 |
C35 |
|
ASTM A193/A193M Chemical Requirements
|
ldentification |
B7, B7M |
B16 |
||
|
Grade . . . |
Chromium-Molybdenum (C 4140, 4142, 4145, 4140 H, 4142 H, and 4145 H) |
Chromium.Molybdenum-Vanadium |
||
|
|
Range |
Product Variation, Over or Under |
Range |
Product Variation, Over or Under |
|
Carbon |
0.37 - 0.49 |
0.02 |
0.36 - 0.44 |
0.02 |
|
Manganese |
0.65- 1.10 |
0.04 |
0.45 - 0.70 |
0.03 |
|
Phosphorus, max |
0.035 |
0.005 over |
0.035 |
0.005 over |
|
Sulfur, max |
0.04 |
0.005 over |
0.040 |
0.005 over |
|
Silicon |
0.15- 0.35 |
0.02 |
0.15 - 0.35 |
0.02 |
|
Chromium |
0.75- 1.20 |
0.05 |
0.80- 1.15 |
0.05 |
|
Molybdenum |
0.15 - 0.25 |
0.02 |
0.50 - 0.65 |
0.03 |
|
Vanadium |
|
|
0.25 - 0.35 |
0.03 |
|
Aluminum, max% |
|
|
0.015 |
|
