Transmission fluid with seamless steel pipe manufacturers, Shuozhou seamless steel tubes, steel dragon mengcun

 Mengcun dragon Acer seamless steel pipe professional management .473 * 10 20 # material, thickness range, with large spot, low price and good quality. Welcome to the new and old customers to inquire. Brinell hardness (HB) with a certain diameter steel balls or carbide ball to the specified test force (F) pressed into the pattern surface, the provisions of hold time after removing the test force, measuring the diameter of the sample surface indentation ( L). Brinell hardness test force is divided by the surface area of ??the resulting indentation spherical providers. With HBS (ball), said unit N / mm2 (MPa). The formula is: where: F-- pressed into the surface of the metal sample test force high-pressure boiler seamless steel pipe manufacturers, N; D-- test ball diameter, mm; d-- indentation average diameter, mm. More accurate and reliable determination of Brinell hardness, but generally HBS only applicable to 450N / mm2 (MPa) or less of a metal material, for harder or thin steel sheet is not applicable. In the steel standards for petroleum cracking seamless steel pipe manufacturers, Brinell hardness most widely used, often indentation diameter d to represent the hardness of the material, both intuitive and convenient. For example: 120HBS10 / 1000130: 10mm diameter steel balls expressed in 1000Kgf (9.807KN) test force, maintain 30s (seconds) measured Brinell hardness value 120N / mm2 (MPa) mengcun dragon Hongye steel, this The company specializes in variety of models, a variety of materials seamless steel tubes. The company is located in the beautiful "elbow pipe capital" Mengcun Hui Autonomous County, Hebei Province, the company strong, good quality and low price. Welcome new and old customers call to discuss the order. 16Mn for seamless steel pipe in one material. ABCD represents quality grade Q235 quality level is divided into A, B, C, D four, from A to D, said the quality from low to high. Different quality level requirements are as follows: A-- provide S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), the need to provide 1800 cold bend test according to the buyer, but no impact energy provides seamless steel tubes, the amount of carbon and manganese content including omission of delivery. B-- provide S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), cold-formed 180 'test. Also provides the + 200C Ak≥27J C-- impact energy requirements in addition to the B-class manufacturers like outside the walled seamless steel pipe, it also provides impact energy when 00C Ak≥27J. D ---- except with the same class B, but also provides impact energy when -200C Ak≥27J E-- same except with the Class B requirements, but also provides -400C impact energy Ak≥27J. Transmission fluid with seamless steel pipe manufacturers, Shuozhou seamless steel pipe, steel pipe mengcun dragon dragon by Mengcun Hui Autonomous County Hongye steel center. Mengcun Hui Autonomous County dragon Wang Yip Pipe Center (www.hebeizhihang.com/)(www.mcflgg.com) strong, credible, Cangzhou in Hebei steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead pipe and you work mengcun dragon into the brilliant, for a better future!