Metal & Oil & Gas News – Nctv.net
Silver bright steel It is also called silver steel branch, commonly known as bright round bar or smooth circle. It refers to the round steel with bright surface without rolling defects and decarburization layer. All kinds of steel, carbon steel, easy cutting steel, bearing steel, tool steel, stainless steel, valve steel, etc., can be processed into silver bright steel.
Contents
Classification method
Flake steel
Polish steel
Buff steel
What is drawing?
- Cold-drawing: the method of applying tension at both ends of a metal material to produce tensile deformation.
- Pinching-out: a method of deforming the material through a die hole by applying a pulling force at one end of the material. The diameter of the die should be smaller than the diameter of the material. Pinching-out can also produce profiles other than round bar, and the final product is usually obtained after several passes of pinching-out.
Application of silver bright steel
Instructions for ordering (GB/T 3207-2008)
Straightness and roughness regulations
|
Delivery status |
Code name |
Straightness |
Roughness Ra |
|
Peeling |
SF |
≤1mm/m |
≤3.0μm |
|
polish |
SP |
≤2mm/m |
≤5.0μm |
|
polishing |
SB |
≤1mm/m |
≤0.6μm |
Tolerance table
|
Nominal diameter |
h7 |
h8 |
h9 |
h10 |
h11 |
|
1.0~3.0 |
0 -0.010 |
0 -0.014 |
0 -0.025 |
0 -0.040 |
0 -0.060 |
|
＞3.0~6.0 |
0 -0.012 |
0 -0.018 |
0 -0.030 |
0 -0.048 |
0 -0.075 |
|
＞6.0~10.0 |
0 -0.015 |
0 -0.022 |
0 -0.036 |
0 -0.058 |
0 -0.090 |
|
＞10.0~18.0 |
0 -0.018 |
0 -0.027 |
0 -0.043 |
0 -0.070 |
0 -0.11 |
|
＞18.0~30.0 |
0 -0.021 |
0 -0.033 |
0 -0.052 |
0 -0.084 |
0 -0.13 |
|
＞30.0~50.0 |
0 -0.025 |
0 -0.039 |
0 -0.062 |
0 -0.100 |
0 -0.16 |
|
＞50.0~80.0 |
0 -0.030 |
0 -0.046 |
0 -0.074 |
0 -0.12 |
0 -0.19 |
|
＞80.0~120 |
0 -0.035 |
0 -0.054 |
0 -0.087 |
0 -0.14 |
0 -0.22 |
|
＞120~180 |
0 -0.040 |
0 -0.063 |
0 -0.100 |
0 -0.16 |
0 -0.25 |
