Fracture Analysis of 35 Steel (Normalizing, Tensile Test Bar)

1 Introduction

Steel 35 refers to a type of steel used for a variety of construction and engineering applications. It is a particularly common choice for equipment and machinery, vehicle frames, and other industrial applications. Steel 35 is composed of a combination of iron and carbon, as other steels are, but has a higher concentration of the alloy chromium—making it harder, more durable, and more resistant to rust and other forms of corrosion. In this paper, we’ll discuss the metallurgy of steel 35, common applications, and the types of tests used to analyze its performance.

2 Metallurgy of Steel 35

Steel 35 is composed largely of iron and carbon, but its success rests in the alloy chromium which is added to the mix. Chromium increases the metal’s strength, making it more resistant to wear and tear. It also increases the metal’s corrosion resistance, by creating a thin but impervious layer of chromium oxide on the surface of the metal, which prevents rust and oxidation. The other alloys commonly added to steel 35 are silicon, manganese, and phosphorus, which are added in small amounts to increase strength, reduce corrosion and wear, and improve machinability.

3 Common Applications

Steel 35 is a popular choice for construction, engineering and industrial applications, due to its combination of strength, corrosion-resistance, and relatively low cost. It is commonly used for machinery and equipment, vehicle frames, and fasteners and connectors, among many other things. It is often used in railways, water pipelines and sewage pipes, because of its strength and corrosion-resistance. Steel 35 is also used for a variety of other applications, including food handling, kitchen equipment, and medical instruments.

4 Testing and Analysis

Before any steel can be used for a given application, it must be tested to determine its strength, durability, and other performance qualities. Steel 35 is typically tested according to ASTM standards, or American Society for Testing and Materials, which offers standard testing methods for a variety of materials. Generally, tests are conducted on a small scale, with a sample part or piece, such as a bolt, washer or plate, being widely used. The sample is exposed to various levels of stress, in order to determine its performance characteristics.

One of the most common tests for steel 35 is the break test or tensile test. This test measures the strength of the steel, its ability to withstand stress, and its ductility, or its ability to deform before breaking. The test is performed by placing the sample in a machine, which then subjects the sample to increasing levels of stress until it breaks. After the test is complete, the metallurgist will analyze the fracture surface of the sample, in order to determine the characteristics of the steel.

5 Conclusion

Steel 35 is a versatile and economical metal alloy, used in a variety of construction, engineering, and industrial applications. It is composed of iron, carbon, and chromium alloys, which give it its strength and corrosion resistance. The performance of steel 35 is tested and analyzed according to ASTM standards, usually by means of the break or tensile test. Through these tests, metallurgists can determine the performance characteristics of the metal, which helps them decide if it is suitable for use in a given application.

Q235B Steel is a common low carbon structural steel. It has many different categories and its outstanding features include high strength, good plasticity and toughness.

The tensile test rod of Q235B steel is mainly used for testing the tensile strength, yield strength and elongation of steel materials. After the tensile test, the fracture surface of the specimen can be observed to understand the tensile property and consistency of the tested steel material. According to the tensile test results, the following information can be obtained, such as yield strength, tensile strength, relative elongation, various parameters related to fracture point, toughness and other information.

The 40×6 mm nano-meter fracture surface of the fracture surface of the tensile test specimen of Q235B steel has the following characteristics: The surface of the fracture is gray but the color is not uniform, almost gray-black or gray-white, with fine sand-like groove wrinkles. Generally, the fracture surface of the tensile test rods of Q235B steel is transgranular. The actual fracture usually forms a needle-like crystal, and there are also a large number of dimples distributed on the fracture surface.

In summary, the tensile test rod fracture of Q235B steel is mainly transgranular, with gray color, uneven color and a large number of needle-like crystals and dimples distributed on the fracture surface. Through the analysis of the fracture surface, the mechanical properties of steel materials can be estimated, which is of great significance for the application of steel.