Surface Roughness Review - Stainless Steel Tube

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Surface Roughness Review

Surface roughness also known as surface profile Ra is a measurement of surface finish it is topography at a scale that might be considered "texture" on the surface. Surface roughness is a quantitative calculation of the relative roughness of a linear profile or area, expressed as a single numeric parameter (Ra).

The ability of a manufacturing operation to produce a specific surface roughness depends on many factors. For example, in end mill cutting, the final surface depends on the rotational speed of the end mill cutter, the velocity of the traverse, the rate of feed, the amount and type of lubrication at the point of cutting, and the mechanical properties of the piece being machined. A small change in any of the above factors can have a significant effect on the surface produced.

SURFACE ROUGHNESS

Surface Roughness Average Obtainable By Common Production Methods

Process	Roughness Height Rating Microinches 2000 1000 500 250 125 63 32 16 8 4 2 1 0.5
Flame Cutting	---------XXXX----------
Sawing	------------XXXXXXXXXX---------
Drilling	---------XXXXXXXXXXXXXX------------
EDM	----------XXXXXXX--------
Milling	-----------------XXXXXXXXXXXXX-----------
Broaching	-------XXXXXXXX--------
Reaming	-------XXXXXXXX--------
Laser	XXXXXXXXXXXXXX----------
Burnishing	---------XXXXXXX-------
Grinding	--------------XXXXXXXXXXXXXXXXX--------
Honing	-------XXXXXXXXXXXXX--------
Polishing	-------XXXXXXXX-------------------
Extruding	-------------XXXXXXX------
Investment Casting	------XXXX------------------
Perm Mold Cast	------XXXX------------------
Die Casting	------XXXXXX------

Releated References:
1. ISO 1302 DIN 4768 Comparison of Surface Roughness Values
2. Electrical Discharge Machining EDM Roughness Comparator
3. Polishing Polished Seamless Stainless Steel Pipe Tube
4. Stainless Steel Tubes Surface Roughness Review
5. Stainless Steel Bright Annealing/Annealed Tubes
6. China USA Surface Roughness Standard Comparison
7. Surface Roughness Conversion Chart of Stainless Steel Tube
8. Stainless Steel Tube Surface Finish Types
9. Cleaning of Stainless Steel Tubes
10. Post weld cleaning and finishing of stainless steels
11. Care and maintenance of stainless steel
12. British and American standards for tolerances, surface finish and testing of stainless steel
13. Surface Finish Degree Comparison Table between Rz Ra RMS
14. Surface Roughness Table