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Al l owabl e str esses of typi cal ASM E m ater i al s - Car bon Steel
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Some examples for allowable stress values "S" of typical carbon steels according to Section II, Part D, Table 1A, metric.
Cylinder Cyl inder internal pressure
NB: Please use Section II Part D for all permitted ASME materials.
Elliptical head on internal pressure Torispherical head on internal pressure Klöpperboden (DIN28011) on internal pressure Korbbogenboden (DIN28013) on int. pressure Hemispherical head on internal pressure Flat head (circular) on internal pressure Flat head (noncircular) on internal pressure Equivalent Eq uivalent flange pressure pressure due to ext. loads Loose-type flange on internal pressure Forming strain of a cylinder Forming strain of a head Forming strain of tube or pipe bends Allowable stresses carbon steel Allowable s tresses high alloy steel
carbon steel
S pec. No.
S A-105
SA-106
SA-516
SA-516
S A/EN 10028-2
SA/EN 10216-2
Type/Grade
-
B
60
70
P265GH
P 2 3 5G H
Nominal Composition
c ar arbon s te teel
c ar arbon s te teel
c ar arbon s te teel
c ar arbon s te teel
c ar arbon s te teel
c ar arbon s te teel
Product Form
forgings
smls. pipe
plate
plate
plate
smls. tube
Alloy Desig./UNS No.
K03504
K03006
K02100
K02700
-
-
Size/Thickness [mm]
-
-
-
-
≤ 60
t ≤ 16 16 < t ≤ 40 40 < t ≤ 60
P-No.
1
1
1
1
1
1
Group No.
2
1
1
2
1
1
Min. Tensile Strength [MPa]
485
415
415
485
410
360
Min. Yield Strength [MPa]
250
240
220
260
245
215
I-Applic. and Max. Temp. Limit [°C]
538
538
454
454
NP
538
III-Applic. and Max. Temp. Limit [°C]
371
371
371
371
NP
NP
VIII-1-Applic. and Max. Temp. Limit [°C]
538
538
538
538
371
538
XII-Applic. and Max. Temp. Limit [°C]
343
343
343
343
NP
NP
External Pressure Chart No.
CS -2
CS-2
CS -2
CS-2
CS -2
CS-2
Notes
G10,, S1 G10 S1,, T2
G10 , S1 S1,, T1
G10 , S1 S1,, T2
G10 , S1 S1,, T2
T1
G10 , S1 S1,, T2 T2,, W14
-30 to 40°C [MPa]
138
118
118
138
117
103
≤ 65°C [MPa]
138
118
118
138
117
103
≤ 100°C [MPa]
138
118
118
138
117
103
≤ 125°C [MPa]
138
118
118
138
117
103
≤ 150°C [MPa]
138
118
118
138
117
103
≤ 200°C [MPa]
138
118
118
138
117
103
≤ 250°C [MPa]
136
118
118
138
117
103
≤ 300°C [MPa]
129
118
115
136
117
103
≤ 325°C [MPa]
125
118
112
132
117
103
≤ 350°C [MPa]
122
117
108
128
117
103
≤ 375°C [MPa]
117
105
104
123
106
102
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Allowable stresses of typical ASME materials - Carbon Steel ≤ 400°C [MPa]
101
88.9
88.9
101
-
89.1
≤ 425°C [MPa]
83.9
75.3
75.3
83.8
-
75.4
≤ 450°C [MPa]
67.0
62.7
62.7
67.1
-
62.6
≤ 475°C [MPa]
51.1
45.5
45.5
51.0
-
45.5
≤ 500°C [MPa]
33.6
31.6
31.6
33.6
-
31.6
≤ 525°C [MPa]
21.3
21.9
21.9
21.3
-
21.9
≤ 550°C [MPa]
12.9
12.7
12.7
12.9
-
12.7
≤ 575°C [MPa]
-
-
-
-
-
-
≤ 600°C [MPa]
-
-
-
-
-
-
≤ 625°C [MPa]
-
-
-
-
-
-
≤ 650°C [MPa]
-
-
-
-
-
-
≤ 675°C [MPa]
-
-
-
-
-
-
≤ 700°C [MPa]
-
-
-
-
-
-
≤ 725°C [MPa]
-
-
-
-
-
-
≤ 750°C [MPa]
-
-
-
-
-
-
≤ 775°C [MPa]
-
-
-
-
-
-
≤ 800°C [MPa]
-
-
-
-
-
-
≤ 825°C [MPa]
-
-
-
-
-
-
Notes:
(b)
for interpolation consider General Notes (b): The stress values in this Table may be interpolated to determine values for intermediate temperatures. The values at intermediate temperatures shall be rounded to the same number of decimal places as the value at the higher temperatur between which values are being interpolated.The rounding rule is: when the next digit beyond the last place to be retained is less than 5, retain unchanged the digit in the last place retained; when the digit next beyond the last place to be retained is 5 or greater, increase by 1 the digit in the last place retained.
G5
Due to the relatively low yield strength of these materials, these higher stress values were established at temperatures where the short – time tensile properties govern to permit the use of these alloys where slightly greater deformation is acceptable. The stress values in this range exceed 66 2/3 % but do not exceed 90% of the yield strength at temperature. Use of these stresses may result in dimensional changes due to permanent strain. These stress values are not recommended for the flanges of gasketed joints or other applications where slight amounts of distortion can cause leakage or malfunction. For Section III applications, Table Y – 2 lists multiplying factors that, when applied to the yield strength values shown in Table Y – 1, will give allowable stress values that will result in lower levels of permanent strain.
G10
Upon prolonged exposure to temperatures above 425°C, the carbide phase of carbon steel may be converted to graphite. See Nonmandatory Appendix A, A – 201 and A – 202.
G12
At temperatures above 550°C, these st ress values apply only when the carbon is 0.04% or higher on heat analysis.
G21
For Section I, use is limited to PEB – 5.3. See PG – 5.5 for cautionary note.
G24
A factor of 0.85 has been applied in arriving at the maximum allowable s tress values in tension for this material. Divide tabulated values by 0.85 for maximum allowable longitudinal tensile stress.
H1
For temperatures above 550°C, these stress values may be used only if the material is heat treated by heating to the minimum temperature specified in the material specification, but not lower than 1040°C, and quenching in water or rapidly cooling by other means.
S1
For Section I applications, stress values at temperatures of 450°C and above are permissible but, except for tubular products 75 mm O.D. or less enclosed within the boiler setting, use of these materials at these temperatures is not current practice.
T1
Allowable stresses for temperatures of 370°C and above are values obtained from time – dependent properties.
T2
Allowable stresses for temperatures of 400°C and above are values obtained from time – dependent properties.
T7
Allowable stresses for temperatures of 565°C and above are values obtained from time – dependent properties.
T8
Allowable stresses for temperatures of 595°C and above are values obtained from time – dependent properties.
T9
Allowable stresses for temperatures of 620°C and above are values obtained from time – dependent properties.
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Allowable stresses of typical ASME materials - Carbon Steel W12
W14
These S values do not include a longitudinal weld efficiency f actor. For Section III applications, for materials welded without filler metal, ultrasonic examination, radiographic examination, or eddy current examination, in accordance with NC – 2550, shall provide a longitudinal weld efficiency factor of 1.00. Materials welded with filler metal meeting the requirements of NC – 2560 shall receive a longitudinal weld efficiency factor of 1.00. Other longitudinal weld efficiency factors shall be in accordance with the following: (a) for single butt weld, with filler metal, 0.80 (b) for single or double butt weld, without filler metal, 0.85 (c) for double butt weld, with filler metal, 0.90 (d) for single or double butt weld, with radiography, 1.00 These S values do not include a weld factor. For Section VIII, Division 1, and Section XII applications using welds made without filler metal, the tabulated tensile stress values shall be multiplied by 0.85. For welds made with filler metal, consult UW – 12 for Section VIII, Division 1, or TW – 130.4 for Section XII, as applicable.
notes: If you have further questions please contact us directly or start a discussion in our ASME Code Forum. To stay informed about any changes and amendments to our websites, upcoming seminars and the latest information about the ASME Code, please feel free to subscribe our newsletter. The stress values of the exemplary materials shown here are intended to be used for information and guidance only. They do not replace the use of the tables in ASME Code Section II, Part D and due consideration of all applicable notes. CIS GmbH expressly disclaims liability for errors and omissions in the contents of this site.
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