Q345B seamless pipe

Main characteristics of Q345B seamless pipe:

Good comprehensive mechanical properties, weldability, cold and hot processing performance, and corrosion resistance, with good low-temperature toughness

Q345B seamless pipe product application:

Ships, boilers, pressure vessels, oil storage tanks, bridges, power plant equipment, lifting and transportation machinery, and other welded structural components with higher loads

Q345B seamless pipe old standard comparison:

18Nb containing Nb killed steel, with properties similar to 14MnNb, mainly used in cranes, blowers, chemical machinery, etc

09MnCuPTi is a steel resistant to atmospheric corrosion, with good low-temperature impact toughness, weldability, and good cold and hot processing performance. It is mainly used for various mechanical applications in humid and rainy areas and corrosive atmosphere environments

12MnV is a low-temperature steel with a working temperature of -70 degrees Celsius, mainly used for cryogenic machinery and structural components working at low temperatures

14MnNb has similar properties to 18Nb steel and is mainly used for containers and other structural components with working temperatures ranging from -20 to 450 degrees Celsius

16Mn has good comprehensive mechanical properties, low-temperature performance, cold stamping performance, welding performance, and machinability. It is mainly used in various machinery such as mining, transportation, and chemical industry

The performance of 16MnRE is similar to that of 16Mn steel, with better impact toughness and cold bending performance than 16Mn. Its application is the same as that of 16Mn steel

Chemical composition of Q345D seamless pipe:

C:≤0.18 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.030 S:≤0.030 Ni:≤0.30 Cr≤0.30 Cu:≤0.20 Al:≥0.015 V:0.02-0.15 Nb:0.015-0.06

Chemical composition of Q345B seamless pipe:

C:0.12-0.20 Si:0.20-0.60 Mn:1.00-1.60 P:≤0.040 S:≤0.040 Ni:≤0.30 Cr:≤0.30 Cu:≤0.20 V:0.02-0.15 Nb:0.015-0.06

Mechanical properties of Q345B seamless pipe:

Tensile strength: 490-675 Yield strength: ≥ 345 Elongation: ≥ 21

The difference between Q345B and 16Mn:

Q345B seamless steel pipe belongs to low-alloy steel pipe. Q345B low-alloy steel pipe is one of the materials of seamless steel pipe. Q345B low-alloy steel pipe is a type of steel material. The previous name for steel was 16Mn. The current name is Q345B

Q345B is a material of steel pipe. Q represents the yield of this material, while 345 refers to the yield value of this material. Q345B steel pipe, also known as 16Mn steel pipe, is a type of seamless steel pipe product.

16Mn is a material in steel. A term used in the past for steel. The current name is Q345B.

16Mn belongs to the low-alloy steel series, which is the most common material or grade of steel plate in this series.

The Q345B steel pipe represents a carbon content of around 0.16% in this type of steel. And Mn was proposed separately because of its high content among the five major elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S). About 1.20-1.60%.