Sampling Position of Various Steels
In order to properly determine the properties and chemical composition of various types of steel, an accurate sample must be taken from a representative sample location of the material in question. Depending on the type of steel, the sampling position will vary. This paper will discuss the sampling position of various steels and the process for taking a good sample.
Hot Rolled Steel
When it comes to hot rolled steel, the best sample position is from the center of the material’s longest side. It is important to take the sample in the location that is made up of all of the same production process components in order to ensure a reliable sample. If there are any changes in fabrication, welding, or heat treatment, then sampling should be done from multiple locations in order to obtain a true representation of the entire material.
Cold Rolled Steel
The best sample position for cold rolled steel is at the end of the material. This is because the material properties and chemical composition can vary throughout the material due to its fabrication process and the influences of the press. Taking the sample from an area at the end of the material will ensure that it is from an area untouched by the press, giving an accurate representation of the material’s composition.
Electro-Galvanized Steel
The best sample position for electro-galvanized steel is the center of the material’s longest side. This sample position will usually be free from the effects of any manufacturing process and will give an accurate representation of the material’s composition.
Stainless Steel
The best sample position for stainless steel is from the center of the material’s longest side. This location is likely to be free from the effects of any fabrication, welding, or heat treatments and should give an accurate representation of its chemical composition.
Aluminum Alloy Steel
The best sample position for aluminum alloy steel is from the center of the material’s longest side. This sample position will give a good representation of the material’s properties due to its distance from any fabrication or welding processes.
The Process of Sampling Steel
The process of taking a good sample of steel requires a few steps. First, the material should be selected and measured in order to ensure that the sample size is sufficient to accurately represent the material in question. Next, the sampling location should be marked on the material and the sample should be cut from the material using an appropriate cutting tool. Finally, the sample should be carefully removed and tested for chemical composition and material properties.
Conclusion
In conclusion, it is important to take an accurate sample from the proper sample position of any type of steel in order to get a true representation of the material’s chemical composition and physical properties. Depending on the type of steel, the sampling position may vary, but should always be from the center of the material’s longest side when possible. The process for taking a good sample should follow the same steps for any type of steel and should include selecting the material, measuring it, marking the sampling location, using the proper cutting tool, and finally testing the sample.
