16Mn is a low-alloy high-strength structural steel with a carbon content of 0.1% -0.25%, containing major alloying elements such as manganese, silicon, vanadium, niobium, and titanium; Its total alloy content is less than 3%. Divided into four levels based on strength: 300, 350, 400, and 450MPa. There are mainly Q295, Q345, Q390, Q420, Q460. Q "is the capital Chinese Pinyin prefix of the" qu "character for yielding, followed by the number indicating the minimum yield point (σ s) value of the grade, and the symbol indicating the impurity element (sulfur, phosphorus) content of the steel from high to low, accompanied by carbon contentThe variation of manganese element is divided into four categories: A, B, C, and D. Grade A and B steel are usually referred to as 16Mn

A material in 16Mn seamless steel pipes. A term used in the past for seamless steel pipes. The current name is Q345B seamless steel pipe, and similar materials are Q345C, Q345D, Q345E. The quality grade symbols A, B, C, D, and E respectively indicate that no impact test is required. The impact test temperature is+20 degrees, 0 degrees, -20 degrees, and 40 degrees.

classification

16Mn is a material used in seamless steel pipes.

ABCD represents the quality level Q235, which is divided into four levels: A, B, C, and D, with A to D indicating the quality from low to high. The requirements for different quality levels are as follows: A - Provide the chemical composition of S, P, C, Mn, Si, and fu, fy, δ 5 (δ 10). According to the buyer's needs, 1800 cold bending tests can be provided, but there is no impact energy requirement. Carbon and manganese content are not delivery conditions. B - Provide the chemical composition of S, P, C, Mn, Si and fu, fy, δ 5 (δ 10), cold bending 180 'test. We also provide an impact energy Ak ≥ 27J C at+200C - in addition to meeting the requirements of Class B, we also provide an impact energy Ak ≥ 27J at 00C. D - In addition to meeting the requirements of Class B, it also provides an impact energy Ak ≥ 27J at -200C. E - In addition to meeting the requirements of Class B, it also provides an impact energy Ak ≥ 27J at -400C.