Simple calculation method of theoretical weight of stainless steel plate
Board weight = specific gravity × thickness (mm) × width (m) × length (m),
In the field of construction machinery, due to the importance of precision and size, millimeters are used in the world in units of 1000 mm = 1 meter, and 1 mm = 100 silk.
The weight obtained by this formula is kilograms (KG), and it must be accurate to two decimal places. Because stainless steel is expensive and the transaction volume is large, the number after the decimal point is also very important, so the money should be accurate to two decimal places.
Specific gravity of stainless steel (KG)
Different stainless steels have different specific gravity:
A, the specific gravity of the 400 series is 7.75.
B, 304.321.304N.201.202.304L.301. The specific gravity is 7.93.
C, the specific gravity of 310S.309S.316.316L is 7.98.
Steel number comparison table
Different countries in the world have different names for stainless steel. The market often comes into contact with China and the United States. They are called the national standard and the American standard. The 200 series, 300 series, and 400 series mentioned above are American standards. The American standard is usually called because it is easy to understand. Both are American Standards.
National Standard ============ American Standard
1cr17mn6ni5n========201
1cr18mn8ni5n========202
0cr18ni9============304
00cr19ni10==========304L
0cr18ni12mo2t=======316Ti
00cr17ni14mo2=======316L
0cr17ni12mo2========316
1cr18ni9ti==========321
0cr18ni10ti=========321
0cr23ni13===========309S
1cr20ni14===========309S
0cr25ni20===========310S
1cr25ni20===========310S
0cr13===============405
1cr13===============410
2cr13===============420
3cr13===============420
4cr3===============430
The element content in the national standard designation generally refers to the intermediate value of the content, which is a theoretical value, which can be large or small.
Definition of tolerance
This is a very important term. Tolerance is the accepted length or thickness deviation. Because in the plate production process, it is difficult for various reasons. The actual thickness that comes out is often not up to the theoretical thickness. For example, a 6 mm board is only 5.6 mm. This is the tolerance. The domestic tolerance is often a negative tolerance. Of course, there are positive tolerances, but very few. When buying and selling boards, it is usually calculated according to the theoretical thickness, which is why the theoretical price is lower than the weighing price. There are also differences in tolerances, and the prices are different. Large tolerances are cheaper. For example, 6 mm, if it is 5.5 or less, it is a large tolerance.
