16Mn low-alloy steel pipe is a low-alloy high-strength structural steel: "Q" is the uppercase Chinese pinyin of the word "Qu" for yield, and the subsequent numbers are the minimum yield point (σs) value of the grade, and the subsequent symbols are in accordance with the The content of impurity elements (sulfur, phosphorus) in steel is divided into four grades: A, B, C, and D from high to low and with changes in carbon and manganese elements. Among them, A and B grade steel are usually called 16Mn.
16Mn alloy steel pipe is a low-alloy high-strength structural steel with a carbon content of 0.1%-0.25%, and the main alloying elements manganese, silicon, vanadium, niobium and titanium are added; its total alloy content is less than 3%. According to the intensity, it is divided into 4 levels: 300, 350, 400 and 450MPa. Mainly include Q295, Q345, Q390, Q420 and Q460.
The main chemical compositions(%) of 16Mn low alloy structural tube
| Elements | Data |
| Carbon | 0.12-0.20 |
| Silicon | 0.20-0.60 |
| Manganese | 1.20-1.60 |
| Chromium | - |
| Molybdenum | - |
Mechanical Properties of 16Mn Low Alloy Pipe
| Properties | Data |
| Tesile ób/Mpa | 470-660 |
| Yield ós/Mpa(min) | 275-345 |
| Elongation δ5(%)(min) | 21 |
| SAFA Aku/J(min) | - |
| Brinel hardness HBS(max) | - |
16Mn Structural seamless pipe
What's The Difference Between 16Mn And Q345?
Q345 steel and 16Mn steel are similar in chemical composition, but micro-alloying elements such as Ti, Nb, V, etc. are added. The addition of these elements refines the grains and improves the toughness of the steel, thus making its mechanical properties better than 16Mn steel. Especially in terms of low temperature performance and allowable stress, Q345 steel performs even better.
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