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Q345B/S355JR/ST52 Q275/S275JR Carbon Steel Coils

Your reliable partner in steel supply Backed by a modern 3,800-square-meter warehouse center, we maintain a stable inventory of over 100,000 tons of various steel products every month. This ensures that the materials you need are always readily available, ready for swift shipment—so even your most urgent orders can be fulfilled with speed and reliability. We also offer customized futures resource services, tailored precisely to your specific requirements, including exact quantities and project timelines. Whether it’s a standard product or a special order, we deliver the right steel solution—exactly when you need it. Let’s work together to build your next project efficiently and with confidence.

Commodity name： Q345B/S355JR/ST52 Q275/S275JR Carbon Steel Coils

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Product Description

Carbon steel wire rod is an important metallic material, primarily composed of iron and carbon, with a carbon content ranging from 0.05% to 2.0%. It boasts excellent mechanical and processing properties, such as high strength, good toughness, ease of machining, and weldability, making it widely used in industries like automotive manufacturing, construction, bridge building, transportation, and chemical engineering. Carbon steel wire rods can be produced through processes including hot rolling, acid pickling, and finishing, tailored to meet the specific requirements of various applications.

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Honors and Qualifications

2024 Annual Strategic Partner for Steel Varieties

2023 Annual Strategic Partner for Variety Steel

Zhonggang Network Supermarket Outstanding Supplier

"Diamond Cup" Lange Steel Network "Top 100 List"

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Frequently Asked Questions

What are the differences in performance requirements between steel used for construction and steel used for machinery manufacturing?

Structural steel focuses on strength (especially yield strength), plasticity, toughness, and weldability. For example, reinforcing bars need good ductility to accommodate concrete deformation, facilitate welding connections, and also require certain seismic resistance (good toughness). Steel used in mechanical manufacturing emphasizes strength, hardness, wear resistance, and fatigue strength. For instance, gear steel requires high hardness and wear resistance to withstand friction, while shaft steel needs good comprehensive mechanical properties (matching strength and toughness) to resist alternating loads.

What is the difference between the yield strength and tensile strength of steel? Which one is more important in engineering applications?

Yield strength is the stress at which steel begins to undergo plastic deformation, marking the critical point where the material transitions from the elastic stage to the plastic stage; tensile strength is the maximum stress that steel can withstand before fracture, reflecting the material's ultimate resistance to failure. In engineering applications, yield strength is usually more important because when the material stress reaches the yield strength, irreversible plastic deformation occurs, which may affect the normal use of the structure. Design generally uses yield strength as the basis for strength design to ensure that the structure does not undergo excessive deformation during use.

Into how many categories can steel be divided based on its chemical composition? What are the characteristics of each?

Steel can be mainly divided into carbon steel and alloy steel based on its chemical composition. In carbon steel, carbon is the main alloying element. According to the carbon content, it is further divided into low carbon steel (carbon content ≤ 0.25%), medium carbon steel (0.25% < carbon content ≤ 0.6%), and high carbon steel (carbon content > 0.6%). Its characteristics include lower cost, simpler smelting process, and performance that improves in strength and hardness but decreases in plasticity and toughness as the carbon content increases. Alloy steel is based on carbon steel with added alloying elements such as chromium, nickel, and manganese, offering higher strength, toughness, wear resistance, or corrosion resistance, making it suitable for more demanding working conditions.

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