What is 45 steel? What is 45 steel
1. The material of No. 45 steel is a high-quality carbon structural steel, which is a high-quality product. The carbon content of No. 45 steel is between 0.42% and 0.5%, and magnesium, nickel, phosphorus, sulfur, silicon and other elements are in a certain range, so they can form their own performance characteristics. Such as corrosion resistance, strength, etc., will be very different.
2, if the carbon content is relatively low, although the toughness is improved, the strength will be insufficient. Later, it can also be quenched and tempered, so that its performance can be changed.
45 steel is what material of steel
45 is actually the grade of No. 5 steel plate, which belongs to carbon structural steel and belongs to high-quality products.
If according to the daily standard, it is S45C, and the American standard is 1045. If compared with a3 steel, its strength is higher and it has the ability to resist deformation. The thickness of this steel is the smallest 0.5 mm, the largest can reach 80 mm, the rest will be within this range, and the density of this material per cubic centimeter 17.85 grams. Different steel plates, its elements will be different, like 45 steel.
Its carbon content is between 0.42% and 0.5%, and magnesium, nickel, phosphorus, sulfur, silicon and so on are in a certain range, so it can form its own performance characteristics. Such as corrosion resistance, strength and so on will be very different. If the carbon content is relatively low, the toughness is improved, but the strength will be insufficient. Later, it can also be quenched and tempered, so that its performance can be changed.
What is the chemical composition of carbon steel 45?
45# Carbon steel Chemical composition:
Carbon (C) content is 0.42~0.50%;
Si content was 0.17~0.37%.
Mn content 0.50~0.80%;
Cr content ≤0.25%;
Ni content ≤0.30%;
Cu content ≤0.25%.
45 steel is the name in GB, also known as “oil steel”. Spot hot rolling in the market mostly; Cold rolling specifications between 1.0 and 4.0mm.
No. 45 steel is a high-quality carbon structure steel with low hardness and easy cutting. It is often used to make templates, pins, guide posts, etc., but it must be heat treated.
No. 45 steel after quenching without tempering, hardness greater than HRC55 (up to HRC62) is qualified. The maximum hardness for practical application is HRC55 (high-frequency quenching HRC58).
2, 45 steel do not use carburizing quenching heat treatment process.
Tempered parts have good comprehensive mechanical properties, widely used in motorcycles, automobiles, especially those working under the alternating load of connecting rod, bolt, gear and shaft, etc., in the work to withstand huge friction, usually using the quenching method to improve their hardness, wear resistance and service life.
1. Shaft parts.
2. Rough and material of shaft parts.
3, in the field of mold repair.
What material code is 45 steel
45 steel is also known as s45c, can also be called oil steel, there are peers also called 45 steel, this name is wrong. It is a high-quality carbon structural steel, belongs to carbon steel, carbon content of more than 0.4%, hardness is not high, easy to cut, usually through hot rolling or cold rolling forming.
Non-standard equipment in many parts, will use 45 steel, after tempering or normalizing treatment, you can get better cutting performance, and can obtain higher strength, toughness and other comprehensive mechanical properties, so according to different working conditions, 45 steel parts requirements, generally use tempering and surface quenching, improve the surface hardness of parts treatment, Carburizing can also be used to improve the surface wear resistance.
① The steel number head is to indicate the carbon content and the alloy structural steel containing the same as the carbon structural steel, with 1/10,000 carbon as a unit, such as the head number is 45, it means that the average carbon content is 0.45%; Alloy tool steel is one-thousandth of carbon as a unit, if the head number is 5, it means that the average carbon content is 0.5%.
② After the number indicating the carbon content, use the chemical symbol of the element to indicate the alloy element contained. The content of alloy elements is expressed in a few percent, when the average content is less than 1.5%, only the element symbol is indicated, and the content is not standard. Such as 25Mn2V, it means that the average carbon content is 0.25%, the manganese content is about 2%, and the vanadium content is less than 1.5% of alloy structural steel. Another example is 9SiCr, which means that the average carbon content is 0.9%, and the alloy tool steel containing silicon and chromium is less than 1.5%.
③ For alloy tool steel with a carbon content of more than 1.0%, the carbon content is not indicated in the grade. Such as CrWMn steel, it means that the carbon content is greater than 1.0% and contains chromium, tungsten, manganese three alloying elements alloy tool steel. However, there are special cases, the carbon content of high-speed steel is less than 1.0%, and the grade does not indicate the carbon content. For example, W18Cr4V steel has a carbon content of only 0.7% to 0.8%.
④ Special performance steel grades do not indicate that the method is basically the same as alloy tool steel. For example, 2Cr13 means stainless steel with an average carbon content of 0.2% and a chromium content of about 13%.
⑤ Some special steel, then use a special expression method, such as rolling bearing steel, its grade is expressed by G, does not mark the carbon content, the average content of chromium is expressed by a few thousand. For example, GCr15 indicates a rolling bearing steel with a chromium content of 1.5%.
⑥ For high-grade high-quality steel, add an “A” word at the end of the steel number, such as 38CrMoAIA.