Grades Q390B / C / D are low alloy high strength structural steel plate. These products are suitable for welding structural parts in rolling stock, lifting equipment, mining machinery, motors, boilers, petroleum, chemical industry, shipbuilding, bridges and other industries and other low temperature environments.
Heat analysis composition%
|
Grades |
Carbon |
Manganese |
Silicon |
Phosphorous |
Sulfur |
Niobium |
|
Q390B |
≤0.20 |
1.00～1.60 |
≤0.55 |
≤0.040 |
≤0.040 |
0.015～0.060 |
|
Q390C |
≤0.20 |
1.00～1.60 |
≤0.55 |
≤0.035 |
≤0.035 |
0.015～0.060 |
|
Q390D |
≤0.20 |
1.00～1.60 |
≤0.55 |
≤0.030 |
≤0.030 |
0.015～0.060 |
Q390B, Q390C and Q390D have excellent surface quality, stable and reliable mechanical properties, which greatly saves the use of steel, reduces the weight of the structure, and extends the service life of the equipment. These low alloy steel plates have been used in batches in rolling stock, lifting equipment, mining machinery, motors, boilers, petroleum, chemical industry, shipbuilding, bridge and other industries.
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