Q345 and Q235 Structural steel comparison

Application difference Q345 and Q235:

As Q345 and Q235 alloy element content is different, their applications are quite different.  

• Q235 carbon structural steel is made for metal construction that doesn’t have high demand for steel strength, tie rod, connecting rod, hook, coupler, bolt and nut, sleeve, shaft and welding parts.
• Q345 is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weldability, it is mostly used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, mechanical parts, building structure, general metal parts, Q345(E) steel plate is always delivered in hot rolled or normalizing state, can be used in areas where its temperature is above -40 ℃.

MECHEMICAL PROPERTY comparison of Q345B/Q235B

Steel grade	Tensile strength	Yield strength	Elongation afrer fracture
Q345B	490-675MPa	≥345MPa	≥21%
Q235B	375-500MPa	≥235MPa	≥26%

Chemical composition comparison of Q345B/Q235B

STEEL Grade	C	Si	Mn	P	S
Q345B	≤0.20	≤0.50	≤1.70	≤0.035	≤0.035
Q235B	≤0.20	≤0.35	≤1.40	≤0.045	≤0.045

Bebon steel has professional team which could resolve different problems about UN Q345B and Q235B steel plate. And we are being honest to every customer and have many quality clients overseas. Please contact us if you are interested in Q345B and Q235B steel plate. We look forward to your enquiry and establish long-term cooperative relationship.