precision forging 708A42 alloy steel forgings

precision forging 708A42 alloy steel forgings

708A42 country description:

SAE/AISI/ASTM/UNS/KS/W-NR/1JIS/DIN/EN/GB/ISO/SUS/SUH/STS/SS

= ... Mo: 0.15-0.25;

708A42 chemical composition detection:

708A42 spectrum analyzer - the advantage is that it can analyze multiple elements at a time with high accuracy. The disadvantage is that the price is too high.

708A42 spectrophotometer - the advantage is that the detection wavelength is easy to select and the price is not high. The disadvantage is that the detection result cannot be displayed directly; there is no curve establishment and call function, and the calibration must be re-calibrated each time different elements are detected; it is inconvenient to put in and pour out the colorimetric dish; it requires high basic knowledge of chemical analysis for operators, so it cannot meet the needs of on-site online detection and analysis of enterprises.

708A42 colorimetric element analyzer - the advantage is that it is easy to use and the price is not high. It does not require high basic knowledge of chemical analysis for operators, so it is widely used in on-site analysis of enterprise production inspection.

[What are the differences in the classification of alloy steel at home and abroad? ]

In recent years, although my country has made efforts to move closer to general use in the classification of alloy steel, there are still many differences as follows:

(1) As special steel develops towards "special", "fine" and "high", and extends towards deep processing, the field of special steel is becoming narrower and narrower. The American Special Steel Association defines special steel as tool steel, stainless steel, electrical steel, high temperature alloy and nickel alloy. Structural steel and high-strength steel are included in the category of special steel. With the technological transformation and process improvement of my country's general steel enterprises, the product scope of special steel enterprises is also shrinking. In 2005, general steel enterprises produced more than 1/3 of the total special steel products.

(2) Foreign low alloy steel is actually the low alloy high-strength steel we are familiar with. It belongs to the category of special steel. In the United States, it is called high-strength low alloy steel (HSLA-Steel), and in Eastern European countries, it is called low alloy construction steel and high tensile steel. In China, low alloy steel was previously included in the scope of general steel. The difference in concept is the difference in product. The name has also changed several times, such as low alloy construction steel, ordinary low alloy steel, low alloy structural steel, and in 1994 it was called low alloy high-strength structural steel (GB/T159l-94). So far, from the published data and literature, the name of low alloy steel still varies with the company and the author of the literature.

(3) There is no clear distinction between low alloy steel and carbon steel, or between low alloy steel and alloy steel. In foreign countries, low alloy steel was defined in the 1950s. The general meaning is that any steel with a total alloying element content of less than 3%, a yield strength of more than 275 MPa, good machinability and corrosion resistance, and a steel shape such as profiles, strips, plates, and tubes, which is a substitute for soft steel used directly in the hot-rolled state, is collectively referred to as low alloy steel. In the process of technological development, low alloy steel has undergone great changes in alloy content, performance level, and delivery status.

In my country, low alloy steel is a more general steel category. The steel varieties include not only low alloy welding steel, but also low alloy stamping steel, low alloy corrosion-resistant steel, low alloy wear-resistant steel, and low alloy low-temperature steel. It even includes low and medium carbon content low alloy construction steel and medium and high carbon content low alloy rail steel. my country's classification of low alloy steel is unique, but one problem it brings is the comparability with foreign statistical data.

Company Profile:

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was established in 1997. It is a professional manufacturer of forgings for automobile parts, marine gearbox accessories, and engineering machinery accessories. It can forge copper alloys, titanium alloys, aluminum alloys, carbon steel, stainless steel, high-temperature alloys and other materials. The company covers an area of ​​more than 10,000 square meters and has a standard factory building of 5,000 square meters. It has a complete set of advanced production technology and equipment from mold design, development, parts manufacturing and processing. It has multiple die forging production lines mainly based on 4000T, 2500T, 1600T, 1000T, and multiple auxiliary production lines. The annual output is 15,000 tons. It is exported to more than 20 countries and regions including Germany, the United States, the United Kingdom, France, Russia, etc.