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Carbon structural steel is the most used in steel, the largest number, often rolled into steel, profiles and profiles, generally do not need to be directly used by heat treatment, mainly for general structure and engineering. Q195, Q215, Q235, Q255, Q275, etc., respectively, represent the grade of steel, steel grade by the letter (Q) representing the yield point, yield point value, quality, quality and other symbols in order.
From the chemical composition, the higher the grade of low carbon steel Q195, Q215, Q235, Q255, Q275, the higher the carbon content and manganese content, the more stable its plasticity.
Q195Chemical composition：
C:≤0.12，Mn:≤0.50，Si:≤0.30，S:≤0.040，P:≤0.035
Mechanical property：
Tensile strength (σb/MPa):315-430
Elongation (δ5/%):≥33(steel thickness or diameter ≦16mm),≥32(steel thickness or diameter >16-40mm)
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Q235A ingredients: Mn - 0.30-0.65, the Si - 0.3, S -- 0.05, p - 0.045;
Q235B ingredients: Mn - 0.30-0.70, the Si - 0.3, S P - 0.045-0.045.
The carbon content of steel made of Q235A is between 0.14-0.22%, and the carbon content of steel made of Q235B is between 0.12-0.20%. Secondly, in tensile and impact experiments;material Q235A steel does not do impact test, material Q235B steel to do room temperature impact test, V-notch.
The mechanical properties of steel made of Q235B are stronger, and the mechanical properties of steel made of Q235A are weaker.
Q235B is stronger in welding performance, while Q235A is weaker.
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Tianjin TISCO is a professional steel supplier. With the support of the most professional steel manufacturers and a large number of customers, we can not only provide you with ordinary steel, but also help you customize special steel, special size, special process shape and other services.
Tianjin TISCO uses standard export transport packaging and bundles steel bands according to the size of the stainless steel plate. We have frequent cooperation with freight forwarders to ensure the safe arrival of goods to the port.
According to our shipping experience, a 20-foot container can hold 22 tons of stainless steel, and a 40-foot container can hold 25 tons of stainless steel. For larger orders, we ship by bulk carrier, which is cheaper. Packaging can also be customized according to customer needs.
We provide our customers with planning services, just-in-time production planning and provide customized services to meet the specific requirements of end users. Our company has been committed to improving customer service and product quality for more than ten years, providing high-value solutions for customers' businesses as the basic standard of our work.
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