| THE FINISHES |
| Designation to ASTM
A 480 BS |
Designation to DIN
17 440 |
Description |
SurfaceCondition |
Uses |
| No. 0 Finish/HR
black |
I c or b |
Hot Rolled |
Layer
of Mill scale |
- |
| -No.1 Finish |
II a or
c1II a or c 2 |
Hot rolled
annealed, shot blasted and pickle |
Metallically
clean |
Use for general
fabrication applicationincluding tubing / pipingwhere finish is not
so important |
| CR CR |
III a
or f III a or f |
Work hardened Work |
Smooth
Smooth and bright smoother bright than by than by process c 2 or II
a c 2 or II a |
Used where high
yield and tensile strength are required & corrosion resistance
is not so important |
| CR-Un-pickled |
III s
or g III s or g |
Cold rolled
annealed and not pickled |
Thin
layer of mill scale |
Uses for high
resistant steel |
| 2D |
III b
or h |
Cold rolled
annealed and Pickled |
Dull,
but smoother than by process IIa |
Uniformally dull
finish normally used in forming deep drawn articles which may be
polished after fabrication |
| 2B |
III c
or n |
Cold rolled
annealed and pickled and skin passed |
Dull,
but smoother than by process II b |
Commonly produced the
sane way as 2D except that cold rolled pass is given on
polished rolls on 2D finish. Can be more readily polished than No.1
& 2D |
| BA |
III d
or m |
Bright annealed
finish |
Brighter
and smoother than by process III b |
BA is a bright cold
rolled highly reflective finish retained by final annealing after
cold rolling in a controlled atmosphere furnace. The purpose of the
atmosphere is to prevent scaling or oxidation during annealing. Used
for decorative by process |
| No.4 - 6 finish
|
IV or o |
Cold rolled
annealed and pickled and polished with 100 to 120 grit |
Wheel
grain size for grinding
to be agreed on ordering |
General purpose
polished finish. Widely used for restaurant equipment, kitchen
equipment, store fronts dairy equipment, lifts & elevators etc. |
| 3A/3B/ 4 Patterned
finish |
- |
Patterned rolled |
Surface generally
by process III d,
pattern-rolled on one side |
|
