What is No.2D Stainless Steel Surface Finish? Properties and Applications
No.2D stainless steel surface finish is a matte, non-reflective surface obtained by applying annealing and pickling processes after cold rolling. This surface, which does not contain gloss, is preferred especially in technical and industrial applications due to its uniform structure. Thanks to its oil-retaining capability, it is highly suitable for deep drawing operations. It stands out as a reliable base surface in the production of parts and equipment used in the automotive, petrochemical, and heavy industry sectors.
Product Description:
No.2D finish is a surface with a natural, non-directional matte appearance, obtained by cold rolling, followed by annealing and pickling of stainless steel. Since no bright rolling (skin pass) is applied, it is less reflective but still maintains a smooth surface characteristic.
This type of surface is ideal especially for deep drawing applications; its ability to retain lubricants makes it widely used in manufacturing processes such as automotive exhaust systems, trays, and panel production.
No.2D surface also provides a suitable base for subsequent decorative treatments or painting. It is widely recognized for its reliability, particularly in petrochemical facilities and automotive components.
Technical Specifications:
- Surface Finish Code: No.2D Finish
- Appearance: Matte, silver-grey, and non-reflective
- Process Route: Cold rolled → annealed → pickled → optional light rolling
- Thickness Range: 0.50 mm – 6.00 mm (cold rolled) / 4.00 mm – 50.00 mm (hot rolled No.1 finish is defined separately)
- Surface Roughness: Smooth with low reflectivity
- Advantages: Good lubricant retention for deep drawing, strong adhesion for painting and coating
Applications:
- Automotive industry: Exhaust systems, trays, and panel production
- Petrochemical and chemical plants: Tanks, pipes, and equipment housings
- Deep drawing applications: Manufacturing processes where steel sheets are formed
- Roofing systems and drainage equipment
- Industrial equipment components: Used as a base surface before final polishing
Advantages:
- Ideal for applications where non-reflective, matte surfaces are required
- Minimizes lubricant loss during deep drawing and improves processing efficiency
- Provides strong adhesion for additional coatings and decorative processes
- Cost-effective – an economical solution for general-purpose surface finish requirements