The Chinese steel industry was born in the early 20th century when the first steel train rails were produced in Shanghai in 1914. Since then, many other steel products have been produced in China and exported to other countries. However, until the adoption of the GB Standard in 1949, China did not have a uniform standard for steel products.

GB/T 699 85-A is a popular alloy steel used for a variety of purposes, from precision machining to general engineering use. Its chemical composition includes iron, carbon, manganese, silicon, sulfur, and phosphorus. It also has a Brinell Hardness of approximately 180-240 HBW, and a tensile strength of 420-520MPa. The advantages of GB/T 699 85-A steel include its high strength, hardness, and low cost. On the other hand, its disadvantages include limited ductility and brittleness over time. Common applications of GB/T 699 85-A steel include automotive components, machine parts, engine components, and precision tools.

GB/T 700 U12355 carbon structural steel is an excellent choice for a variety of engineering and construction applications due to its superior strength, formability and weldability. It is suitable for use in bridges, roads, ships and trains, and for equipment used in manufacturing, workshops, and other industrial applications. Its low cost makes it even more attractive, making it an economically viable option for many projects.

JIS G3445 STKM12C can be used in a variety of applications that require a strong and reliable steel. Some of the most common applications are in construction, automotive, vehicle components, pipes and tubes. The steel is particularly suited to these types of applications because of its strength and flexibility.JIS G3445 STKM12C grade steel is an excellent choice for any application where strength, durability and corrosion resistance are important. It is also an excellent choice for applications that require a steel that is both strong and flexible.

ASTM A515/A515M A515 485 steel is a grade of steel used mainly in boiler and pressure vessel applications. The composition of the material is carbon, silicon, manganese, phosphorus, sulfur, and aluminum, with trace amounts of other elements. As with any steel, it needs to be machined in order to create the desired parts or components. The machining of ASTM A515/A515M A515 485 steel requires the use of certain tools and methods to ensure that the material is properly shaped, sized, and finished.

ASTM A537/A537M A537 Class 2 is a high-strength, low-alloy steel that has been developed to meet the demands of steel construction and fabrication. It is also known as a pressure vessel grade steel because it is used to make pressure vessels, including boilers, tanks, and other special containers designed to withstand strong internal pressures. The steel can be heat-treated to a higher tensile strength and the primary alloys used are chromium, nickel, and molybdenum.

ASTM A516/A516M A516 Grade 65 [450] steel is a steel variant designed for pressure vessels and boilers. It has a high content of carbon and other alloying elements to give it a set of specific chemical, mechanical and thermal properties. The strength of the steel is relatively low compared to other steels. However, it does offer an excellent corrosion resistance, making it particularly suitable for applications such as storage tanks and boilers.

ASTM A684/A684M 1035 steel is a medium carbon, low alloy steel often used for the construction of various structural components. The steel has excellent weldability and formability and good mechanical properties, making it suitable for a variety of applications. The steel has a tensile strength of 696MPa and a yield strength of 485MPa, making it strong enough for applications such as bridge components and vehicle frames. The steel also has a good impact energy of 27J at -20 degrees Celsius, making it suitable for applications where the steel needs to be resistant to impacts, such as crane booms. The steel also has good hardness and machinability, allowing it to be easily cut and fabricated. This makes it suitable for a variety of applications and is one of the reasons why it is so widely used.

The hardness of GB/T 699 U20106 is usually measured by the Brinell Hardness Test. This test measures the resistance of the steel to surface indentations made by a small steel ball. GB/T 699 U20106 has a Brinell Hardness of approximately 180-240 HBW. In terms of strength, GB/T 699 U20106 has a tensile strength of approximately 420-520MPa, making it one of the strongest steel alloys available. This high strength and hardness makes it suitable for a wide range of applications, including precision machining, engineering tools, and automobiles.

The GB 700 Standard defines steel products as materials formed into specified shapes, structures or products as a result of their metallurgical processes. The standard covers steel products in both micro-alloyed or standard grade forms that are commonly used in building and civil engineering. This includes steel plates and coils, bars, sections and tubulars, supports and beams, pipelines, coils with special shape, and steel used in construction such as bridge and road construction.

ASTM A684/A684M 1065 steel is used in a variety of industries, such as construction, automotive, aerospace, and energy. In construction, it is typically used to make bridges, towers, and various other structures. It is also used to make automotive components, as well as for aerospace parts and components for energy production.

JIS G3454 standard defines a structural quality carbon and alloy steel pipe, which is designed to be used in high-pressure applications that involve steam or gas. Furthermore, this type of pipe is usually manufactured in sizes ranging from 1/8 inches to 2 inches, with an outside diameter range between 6.4mm and 76.4mm. In addition, the JIS G3454 STPG 38 steel pipe has a tensile strength value of somewhere between 330 and 510 MPa, as well as a yield strength ranging from 205 to 245 MPa.

GB/T 700 U12352 steel is an ideal choice for a variety of construction applications due to its excellent thermal properties and strength-to-weight ratio. It is a low carbon and high-strength quenched and tempered structural steel that is widely used in a multitude of applications, including bridges, buildings, ships, tanks, power transmission lines, transmission towers, and more. GB/T 700 U12352 steel is also used to manufacture components for mechanical and automotive products such as shear blades, die casting molds, and wind turbine blades.

The GB/T 700 standard stipulates the grade and classification of carbon and steels and precisely defines their chemical composition, mechanical performance, and physical properties. Moreover, it establishes unified standards for physical and mechanical properties, including strength, extension, toughness, expansion, bending and other aspects related to quality control of steel.

JIS G3445 is a standard carbon steel grade that is used in machinery and applications. It covers the dimensions, chemical composition, mechanical properties and requirements of the steel. The dimensions include the outer dimensions, wall thickness, inner dimensions, length and mass. The chemical composition includes the desired amount of carbon and the allowable levels of impurities such as sulfur and phosphorus. The mechanical properties include the strength, elongation, hardness and impact resistance of the steel.