ASTM A36 A
basic oxygen process steel, ASTM A36 has good forming and welding ability, and
can be hardened within its carbon limitations. Generally supplied flame cut to
size (BTS) or flame cut to print shape (BPP), it can be sheared easily in thin
thicknesses, typically ¼" thick and smaller. Stress relieving is
recommended prior to machining if dimensional stability or specific flatness
tolerances are required.
ANALYSIS
|
|
Carbon
(C)
Max
|
Manganese
(Mn)
|
Phosphorus
(P)
Max
|
Sulfur
(S)
Max
|
|
|
|
|
|
|
|
3/4"
and under
|
0.25
|
Trace
|
0.04
|
0.04
|
|
Over
1-1/2" to 2-1/2"
|
0.26
|
0.8-1.2
|
0.04
|
0.05
|
|
Over
2-1/2" to 4"
|
0.27
|
0.85-1.2
|
0.04
|
0.05
|
|
Over
3/4" to 1-1/2"
|
0.25
|
0.8-1.2
|
0.04
|
0.05
|
|
Over
4
|
0.29
|
0.85-1.2
|
0.04
|
0.05
|
MECHANICAL PROPERTIES
|
Condition
|
Tensile
Strength
(PSI)
|
Yield
Strength
(PSI)
|
Reduction
|
Elongation
in 2"
|
Brinell
Hardness
|
|
ASTM A36
|
58,000-80,000
|
36,000
|
60
|
30
|
149
|
APPLICATIONS
ASTM A36 is used for general purpose structural, machinery
parts, frames, fixtures, automotive and agricultural implements and equipment,
brackets, stakes, ornamental works, forgings, base plates, gears, cams,
sprockets, jigs, rings, templates, fixtures, bearing plates, tanks, bins,
various parts obtained by flame cutting, and miscellaneous non-critical
applications that involve mild cold bending, mild hot forming, punching,
machining, and welding.
MACHINEABILITY AND WELDABILITY
ASTM A36 has a machinability rating of 72%, based on 1212 at
100%. Average surface cutting feed 120 ft/min. ASTM A36 plate is easily welded
by all welding processes and the welds and joints produced are of extremely
high quality.
HEAT TREATING
ASTM A36 will respond to any of the standard carburizing and
subsequent hardening methods used for such grades as 1018.
Normalize 1650-1750F Anneal 1550-1600F Stress Relieve 1250-1700F Carburize 1650-1700F Harden 1450-1500F
Normalize 1650-1750F Anneal 1550-1600F Stress Relieve 1250-1700F Carburize 1650-1700F Harden 1450-1500F
TOLERANCES
Thickness
|
|
Tolerance Over Specified
Thickness, For Widths Given, in Inches
|
|||||||||
|
Thickness
(Inches)
|
Thru 47
|
48
to
59
|
60
to
71
|
72
to
83
|
84
to
95
|
96
to
107
|
108
to
119
|
120
to
131
|
132
to
143
|
144
to
167
|
|
To under 1/4
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.040
|
-
|
|
1/4 to under 5/16
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.040
|
0.040
|
-
|
|
5/16 to under 3/8
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.040
|
0.040
|
0.050
|
|
3/8 to under 5/8
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.030
|
0.040
|
0.040
|
0.050
|
0.060
|
|
3/4 to under 1
|
0.030
|
0.030
|
0.030
|
0.030
|
0.040
|
0.040
|
0.050
|
0.050
|
0.060
|
0.070
|
|
1 to under 2
|
0.060
|
0.060
|
0.060
|
0.060
|
0.060
|
0.070
|
0.080
|
0.100
|
0.100
|
0.110
|
|
2 to under 3
|
0.090
|
0.090
|
0.090
|
0.100
|
0.100
|
0.110
|
0.120
|
0.130
|
0.140
|
0.150
|
|
3 to under 4
|
0.110
|
0.110
|
0.110
|
0.110
|
0.110
|
0.130
|
0.140
|
0.140
|
0.140
|
0.150
|
|
4 to under 6
|
0.150
|
0.150
|
0.150
|
0.150
|
0.150
|
0.150
|
0.150
|
0.150
|
0.150
|
0.200
|
|
6 to under 10
|
0.230
|
0.240
|
0.240
|
0.240
|
0.240
|
0.240
|
0.240
|
0.240
|
0.240
|
0.270
|
Tolerance under specified thickness .010" x 3/4 x
52" wide plate, for example, would have a tolerance range of
.740-.780"
Because of tolerances, ie thickness, flatness and camber, as well as the hot roll condition, ASTM A36 generally does not finish to specified thickness.
Because of tolerances, ie thickness, flatness and camber, as well as the hot roll condition, ASTM A36 generally does not finish to specified thickness.
Camber
Permissible camber for sheared and Gas-Cut A36 Plate, All
Thicknesses:
Maximum Camber (Inches) = 1/8" x ( Number of feet of length / 5 )
Maximum Camber (Inches) = 1/8" x ( Number of feet of length / 5 )
Flatness
For all plates, the longest dimension is considered the
length, and flatness tolerance along the length should not exceed the amounts
indicated below the specified width and thickness in plate though 12' in length
or longer. The flatness variations across the width should not exceed the
tabular amount for the specified width
|
|
Flatness
Tolerances For Specified Widths, in Inches
(Maximum deviation from a horizontal flat surface) |
|||||||
|
Thickness
|
Lbs/Sq. FT
|
> 36
|
36 > 48
|
48 > 60
|
60 > 72
|
72 > 84
|
84 > 96
|
96>108
|
|
Under 1/4"
|
> 10.2#
|
0.813
|
1.125
|
1.375
|
1.875
|
2.000
|
2.250
|
2.375
|
|
1/4 to under 3/8
|
10.2 > 15.3
|
0.750
|
0.938
|
1.125
|
1.375
|
1.750
|
1.875
|
2.000
|
|
3/8 to under 1/2
|
15.3 > 20.4
|
0.750
|
0.875
|
0.938
|
0.938
|
1.125
|
1.313
|
1.500
|
|
1/2 to under 3/4
|
20.4 > 30.6
|
0.625
|
0.750
|
0.813
|
0.875
|
1.000
|
1.125
|
1.250
|
|
3/4 to under 1
|
30.6 > 40.8
|
0.625
|
0.750
|
0.875
|
0.875
|
0.938
|
1.000
|
1.125
|
|
1 to under 2
|
40.8 > 81.7
|
0.563
|
0.625
|
0.750
|
0.813
|
0.875
|
0.938
|
1.000
|
|
2 to under 4
|
81.7 > 163.4
|
0.500
|
0.563
|
0.688
|
0.750
|
0.750
|
0.750
|
0.750
|
|
4 to under 6
|
163.4 > 245.0
|
0.563
|
0.688
|
0.750
|
0.750
|
0.875
|
0.875
|
0.938
|
|
6 to under 8
|
245.0 > 326.7
|
0.625
|
0.750
|
0.750
|
0.938
|
1.000
|
1.125
|
1.250
|
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