303 Stainless Steel Bar

303 Stainless Steel Bar

303 Stainless steel round bar is the easy-cutting stainless steel containing sulfur and selenium, which is mainly used for easy cutting and table and high degree of light. 303 stainless steel improves cutting performance and high temperature resistance bonding properties. Most suitable for...
Product description

303 Stainless steel round bar is the easy-cutting stainless steel containing sulfur and selenium, which is mainly used for easy cutting and table and high degree of light. 303 stainless steel improves cutting performance and high temperature resistance bonding properties. Most suitable for automatic lathe. Bolts and nuts.


303 Stainless Steel Round Bar Chemical Composition (%)

C ≤ 0.15

Si ≤ 1.00

Mn ≤ 2.00

P ≤ 0.20

S ≥ 0.15

Cr: 17.00~19.00

Ni: 8.00~10.00


303 Stainless steel is an austenitic shape easy to cut wear-resistant acid steel, in order to improve the performance of the steel, can be added in the steel not more than 0.60 ﹪ molybdenum, can be resistant to ablation, product good cutting and fire resistance. 


Mechanical Properties after Annealing to Stress

Tensile Strength: 515MPa

Yielding Strength: 205MPa

Elongation Rate: 40%

Standard hardness of stainless steel 303 HRB 90-100, HRC 20-25, note: HRB100 = HRC20


Will 303 stainless steel material rust?

When the surface of stainless steel tube brown rust or rust point, people are surprised: think that "stainless steel is not rusty, rust is not stainless steel, may be the problem of steel." In fact, this is a lack of understanding of stainless steel a one-sided wrong view. So, 303 stainless steel In the end will rust? The answer is yes, all stainless steel under certain conditions will rust, 303 stainless steel Of course is no exception.


Stainless steel has the ability to resist atmospheric oxidation--that is, it is not rust, but also has the acid, alkali, salt in the medium is corrosion of the ability--that is, corrosion resistance. However, the corrosion resistance is changed with the chemical composition of the steel itself, the mutual state, the use condition and the environmental medium type. such as 303 stainless steel materials, in the dry and clean atmosphere, there is an absolute excellent corrosion resistance, but move it to the seaside area, the environment is humid, coupled with the processing engineering of the surface of the bar to a higher temperature, then it will be more easy to rust.


Second, the stainless steel is not rust, the key is because the steel contains chromium (CR) this element. Under the action of corrosive medium, the surface of the steel is formed with a solid and dense oxide film, which is called "passivation film". This layer of film separates the metal from the external media and prevents further corrosion of the metal. There is also the ability to self-repair, if once destroyed, the chromium in the steel and the oxygen in the medium to regenerate the passivation film, continue to protect the role. Stainless steel is not rust, but also with the use of the environment, different environments, to use a different amount of chromium stainless steel. The level of chromium content is the fundamental factor determining the performance of stainless steel. It is reported that Europe and the United States and other countries Standard minimum chromium content can not be less than 10.5%, Japan's provisions are 11%, China is 12%.


303 Stainless steel is an austenitic shape containing sulfur and selenium, easy to cut and wear-resistant acid steel, for the main requirements of easy cutting and high surface finish of the occasion. 303 stainless steel to improve cutting performance and high-temperature bonding performance, most suitable for automatic lathe, bolts, nuts and lock core.


To ensure that the metal surface is permanently shiny and not corroded, we recommend that:

1. The stainless steel surface is often cleaned and scrubbed, removing attachments and eliminating external factors that cause corrosion.

2. The coastal area can use the slightly high chromium 303 material stainless steel corrosion resistance.

3. Some 303 stainless steel materials on the market can not meet the corresponding national standards, up to less than 303 material requirements, it will also cause rust, which requires users to carefully choose reputable manufacturers of products.

 


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