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Table 5.11 - Weld Surface Fatigue-Strength-Reduction Factors
|
Weld |
Surface |
Quality Levels (see Table 5.12) |
||||||
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
||
|
Full penetration |
Machined |
1.0 |
1.5 |
1.5 |
2.0 |
2.5 |
3.0 |
4.0 |
|
As-welded |
1.2 |
1.6 |
1.7 |
2.0 |
2.5 |
3.0 |
4.0 |
|
|
|
||||||||
|
Partial penetration |
Final surface machined |
NA |
1.5 |
1.5 |
2.0 |
2.5 |
3.0 |
4.0 |
|
Final surface as-welded |
NA |
1.6 |
1.7 |
2.0 |
2.5 |
3.0 |
4.0 |
|
|
Root |
NA |
NA |
NA |
NA |
NA |
NA |
4.0 |
|
|
|
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|
Fillet |
Toe machined |
NA |
NA |
1.5 |
NA |
2.5 |
3.0 |
4.0 |
|
Toe as-welded |
NA |
NA |
1.7 |
NA |
2.5 |
3.0 |
4.0 |
|
|
Root |
NA |
NA |
NA |
NA |
NA |
NA |
4.0 |
|
Table 5.12 - Weld Surface Fatigue-Strength-Reduction Factors
|
Fatigue-Strength-Reduction |
Quality Level |
Definition |
|
1.0 |
1 |
Machined or ground weld that receives a full volumetric examination, and a surface that receives MT/PT examination and a VT examination. |
|
1.2 |
1 |
As-welded weld that receives a full volumetric examination, and a surface that receives MT/PT and VT examination |
|
1.5 |
2 |
Machined or ground weld that receives a partial volumetric examination, and a surface that receives MT/PT examination and VT examination |
|
1.6 |
2 |
As-welded weld that receives a partial volumetric examination, and a surface that receives MT/PT and VT examination |
|
1.5 |
3 |
Machined or ground weld surface that receives MT/PT examination and a VT examination (visual), but the weld receives no volumetric examination inspection |
|
1.7 |
3 |
As-welded or ground weld surface that receives MT/PT examination and a VT examination (visual), but the weld receives no volumetric examination inspection |
|
2.0 |
4 |
Weld has received a partial or full volumetric examination, and the surface has received VT examination, but no MT/PT examination |
|
2.5 |
5 |
VT examination only of the surface; no volumetric examination nor MT/PT examination. |
|
3.0 |
6 |
Volumetric examination only |
|
4.0 |
7 |
Weld backsides that are non-definable and/or receive no examination |
|
Notes: 1. Volumetric examination is RT or UT in accordance with Part 7. 2. MT/PT examination is magnetic particle or liquid penetrant examination in accordance with Part 7 3. VT examination is visual examination in accordance with Part 7. 4. See WRC Bulletin 432 for further information. |
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Table 5.13 - Fatigue Penalty Factors For Fatigue Analysis
|
Material |
Ke [Note(1)] |
Tmax [Note(2)] |
||
|
m |
n |
(°C) |
(°F) |
|
|
Low alloy steel |
2.0 |
0.2 |
371 |
700 |
|
Martensitic stainless steel |
2.0 |
0.2 |
371 |
700 |
|
Carbon steel |
3.0 |
0.2 |
371 |
700 |
|
Austenitic stainless steel |
1.7 |
0.3 |
427 |
800 |
|
Nickel-chromium-iron |
1.7 |
0.3 |
427 |
800 |
|
Nickel-copper |
1.7 |
0.3 |
427 |
800 |
Notes:
(1) Fatigue penalty factor
(2) The fatigue penalty factor should only be used if all of the following are satisfied
· The component is not subject to thermal ratcheting, and
· The maximum temperature in the cycle is within the value in the table for the material
Table 5.13 - Fatigue Penalty Factors For Fatigue Analysis
|
Material |
Ke [Note(1)] |
Tmax [Note(2)] |
||
|
m |
n |
(°C) |
(°F) |
|
|
Low alloy steel |
2.0 |
0.2 |
371 |
700 |
|
Martensitic stainless steel |
2.0 |
0.2 |
371 |
700 |
|
Carbon steel |
3.0 |
0.2 |
371 |
700 |
|
Austenitic stainless steel |
1.7 |
0.3 |
427 |
800 |
|
Nickel-chromium-iron |
1.7 |
0.3 |
427 |
800 |
|
Nickel-copper |
1.7 |
0.3 |
427 |
800 |
Notes:
(3) Fatigue penalty factor
(4) The fatigue penalty factor should only be used if all of the following are satisfied
· The component is not subject to thermal ratcheting, and
· The maximum temperature in the cycle is within the value in the table for the material