16Mn is a low-alloy high-strength structural steel: carbon content of 0.1% -0.25%, adding the main alloying elements manganese, silicon, vanadium, niobium and titanium, etc.; its total amount of alloy containing <3%. It is divided into four levels of 300, 350, 400 and 450 MPa according to intensity.
There are mainly Q295, Q345, Q390, Q420, Q460. "Q" is the Chinese Pinyin capitalized initial of the yielding "Qu", and the subsequent number is the value of the minimum yield point (σs) of this grade. The following symbol is according to the content of the impurity elements (sulphur and phosphorus) of the steel. Low and accompanied by carbon,
Changes in manganese elements are divided into A, B, C, and D. Which A, B grade steel is usually called 16Mn.
A material in 16Mn seam steel pipe. In the past, a style of seamless steel pipe. The current name is Q345B seamless steel tube. The similar material is Q345C, Q345D, Q345E, and the quality grade symbol ABCDE indicates that the impact test impact temperature is not required to be +20 degrees 0 degrees -20 degrees 40 degrees respectively.
16Mn is a material in seamless steel tubes.
ABCD indicates that the quality level of Q235 is divided into four levels of A, B, C, and D. From A to D, the quality is from low to high. The requirements for different quality grades are as follows: A—Provide chemical composition of S, P, C, Mn, Si and fu, fy, and δ5 (δ10). According to the buyer’s needs, 1800 cold bending test can be provided, but there is no impact energy requirement, and carbon content is included. And the amount of manganese is not as a delivery condition. B—Provides S, P, C, Mn, Si chemical composition and fu, fy, δ5 (δ10), cold bend 180′ test. Also provides +200C impact energy Ak ≥ 27J C - in addition to the same as the B-level requirements, but also provide 00C impact power Ak ≥ 27J. D - In addition to the same requirements as Class B, it also provides impact work Ak -27J E at -200C - in addition to Class B requirements, it also provides impact work Ak -27J at -400C.
The knowledge source of this pipe
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