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Surface Finish Spec Table
Surface Finish KS Specifications — 3 sizes
KS B ISO 2553
Symbols indicating post-weld surface finish profile (flat, convex, concave).
Practical Notes
- Indicates post-weld surface finish. Specify flush finish when required.
KSSurface Finish
3 sizes| Name | Type | Symbol | Description | Dimension | Note |
|---|---|---|---|---|---|
| Flat Finish | Surface Finish | — | WeldSurface Flat Machining | - | Airtight, |
| Convex Finish | Surface Finish | ∩ | ConvexType Finished | - | Strength Improved |
| Concave Finish | Surface Finish | ∪ | ConcaveType Finished | - | Stress Reduction |
Key Features
- Weld bead surface finish: flush, convex, and concave—3 symbol types
- Flush finish implies grinding/machining post-treatment; bead height required to be zero
- Concave fillet reduces stress concentration; convex provides additional throat thickness
Key Applications
Appearance weld surface flush finish, fatigue-load concave finish, high-strength convex beads, pressure vessel interiors, food hygiene welds