35crmo steel belongs to alloy structural steel, Q345 steel belongs to low alloy high strength steel. Below we will analyze and compare the differences between 35crmo steel and Q345 steel in terms of chemical composition, mechanical properties, and characteristics.
1. Different chemical composition
35crmo steel chemical composition: C: 0.32-0.40; Si: 0.17-0.37; Mn: 0.40-0.70; Cr: 0.80-1.10; Mo: 0.15-0.25.
Q345 steel chemical composition: C≤0.2; Si≤0.5; Mn≤1.7; P≤0.035; S≤0.035; Nb≤0.07; V≤0.15; Ti≤0.20; Cr≤0.30; Ni≤0.50; Cu ≤0.30; N≤0.012; Mo :0.10.
2. Different mechanical properties
Mechanical properties of 35crmo steel: tensile strength: ≥980mpa; yield strength: ≥835mpa; elongation after fracture: ≥12%; reduction of area: ≥45%; impact work: ≥63J.
Mechanical properties of Q345 steel: tensile strength: ≤630mpa; yield strength: 345mpa; elongation after fracture: ≥18%; impact work: ≥27J.
3. Different characteristics
The operating temperature of 35crmo steel can be between 500 degrees Celsius and -110 degrees Celsius. It has high durable hardness and creep strength at high temperatures, and has good low-temperature impact toughness. 35crmo steel can be used to manufacture important parts in various machines that bear impact, bending and torsion.
Q345 steel has good comprehensive mechanical properties, low-temperature impact toughness, cold stamping and machinability and weldability. Q345 steel is widely used in various welded structures, such as bridges, vehicles, ships, pipelines, boilers, large containers, and storage tanks. , Heavy machinery and equipment, mining machinery, power stations, plant structures, low-temperature pressure vessels, textile machinery parts, etc.
