Table of recommended values of weld joint factors for specific weld types.
|
Weld type |
Type of loading |
Factor of weld joint |
|||
|
Butt welds 1 ) |
Pressure |
α 1 |
1.00 |
||
|
Traction |
0.85 |
0.90 2 ) |
1.00 3 ) |
||
|
Shear |
α 2 |
0.70 |
|||
|
Fillet welds |
End |
α 3 |
0.75 4 ) |
0.90 5 ) |
1.00 6 ) |
|
Side |
α 4 |
0.65 4 ) |
0.80 5 ) |
0.90 6 ) |
|
|
Plug and groove welds |
Shear |
α |
0.65 |
||
|
Spot welds |
Shear |
α |
0.65 |
||
|
Tear-out |
α |
0.65 |
|||
1) Factor of weld joint for loading along the axis of weld joint. α = 1.
2) Applies to contact resistance welding.
3) Applies to:
- Butt welds manually welded and supported by the weld from the root side after grooving.
- Butt welds bilaterally penetrated, automatic welding under flux or in CO 2 made at least from one side.
- Electro-slag welds.
4) Applies to manual arc welding while the strength of used electrode corresponds to the strength of basic material.
5) Applies to:
- Manual arc welding of basic materials whose minimum tensile strength is 20 percent lower than minimum strength of weld metal of used electrode.
- Semi-automatic submerged welding, semi-automatic and automatic welding shielded by CO2 atmosphere and for automatic submerged welding of single-pass or multi-pass welds for the weld height of 8 mm.
6) Applies to automatic submerged welding of single-pass welds for the weld height a< 8 mm.