Quality Control

Quality Assurance Scope for External Appearances

The external appearance surfaces must be free of blemishes caused by nails.
For surfaces that are not considered external appearance surfaces, some processing/machining marks may be present.

With laser processing The cut surface will have a smooth edge.	With turret punch press machining The machining surface will have a smooth curved shape.
Cut surface		Marks from the hanging jig used during the application of the painting coat

Any burrs that exceed 0.1 mm that occurred as a result of the machining/processing will be removed.
*Does not include light chamfering or C-chamfering.
If chamfering or filleting is required on the external sections, include this in the modeling. However, this does not apply to chamfers and fillets in the plate thickness direction.
Note that the appearance of the cut surface may vary depending on the processing/machining method. (The processing/machining method cannot be specified.)
Marks may remain from the hanging jig used during the application of the painting coat.
Machining/processing marks from the die used during the bending process may remain.
*For EN 1.4301 equiv.#400 and EN 1.4301 equiv.(single-sided hairline finish), protective sheets are applied to external appearance surfaces to protect against the formation of defects.
Bulging/protrusions of about 15% of the plate thickness can occur on each side of the bent sections during the bending process.


Burring in the pulling direction	Damage caused by bending	Protrusion from bending

For thick plates (over 6.0 mm), burn marks from laser cutting may be noticeable.


EN 1.4301 equiv.(No.1) plate thickness 12㎜	EN 1.0038 equiv. plate thickness 16㎜

Unevenness may occur inside the hole. Also, when viewed from the back side of the product, the shape of the hole may be slightly distorted.


Unevenness inside the hole	Hole shape distored on the back side

External appearance inspection: Defects, dents, unevenness, condition of painting coat, condition of surface treatment (visual)
Dimensional check: Viewer display dimensions (digital Vernier calipers, goniometers, etc.)
Inspection frequency: As part of each process and immediately prior to shipment


View of inspection (1)	View of inspection (2)

Please refer to the relevant machining specification page for the permissible dimensional tolerances for each material.