Grade 45# Q355 Mild Steel Coils For Mechanical Parts High Strength Structural Components

Middle Carbon Steel Grade 45# Q355 Used For Mechanical Parts, High-strength Structural Components

Product Descrition

45#steel 

Core Applications: Primarily used in manufacturing mechanical parts that withstand moderate loads and require a certain level of strength and toughness, often necessitating final heat treatment.

Shafts: Various drive shafts, machine tool spindles, gear shafts, splined shafts, etc.

Gears and Worms: Automotive transmission gears, machine tool gears, etc. (for applications with low impact).

Connecting Rods and Bolts: Engine connecting rods, high-strength bolts, etc.

Molds and Tools: Mold frames for plastic molds, simple stamping dies, and some hand tools.

Other Structural Components: Such as rollers, sleeves, pins, etc.

In short: 45 steel is a "machinery parts steel," its primary application being the core moving components inside machines.

Q355 steel

Key Features:

Chemical Composition: Low carbon (C≤0.24%) with trace amounts of alloying elements (such as Mn, Si, Nb, V, etc.), its strength is enhanced through solid solution strengthening and grain refinement mechanisms.

Properties: Possesses high yield strength and good plasticity and toughness, especially excellent low-temperature impact toughness. Excellent weldability is one of its main advantages.

Delivery Condition: Usually delivered in hot-rolled or normalized condition, allowing users to weld and use it directly without complex heat treatment.

Main Product Forms:
Steel Coils/Plates: Hot-rolled coils (Q355B), medium-thick plates (Q355C/D/E), are the most common product forms of Q355.

Sections and Profiles: H-beams, I-beams, angle steel, channel steel, steel pipes, etc.

Strips and Bars: Corresponding products are also available.

Core Applications: Primarily used for constructing various engineering structures requiring good weldability, plasticity, and low-temperature toughness.

Building Steel Structures: Main load-bearing structures such as beams and columns for high-rise buildings, large factories, stadiums, and convention centers.

Bridge Engineering: Steel structures for highway and railway bridges.

Construction Machinery: Booms and chassis for cranes, excavators, mining equipment, and concrete pump trucks.

Vehicles and Ships: Truck beams, dump truck bodies, ship superstructures, and pressure vessels.

Power Transmission Towers and Structures.

In short: Q355 is "engineering structural steel," its application being the skeleton and shell of large buildings, bridges, and equipment.

Features:

• Product Name: Carbon Steel Coil
• Length: Customized
• Sample: Free
• Custom Made: Yes
• Grade: Q195/Q235/Q345/A36
• Key Word: Hot Rolled Steel Coil
• Thickness: 3mm - 6mm
• Material: Hot rolled carbon steel
• Applications: Can be cut, strip and stamping

Applications:

1. Construction and Structural Industries (Mainly using hot-rolled medium-thick coils)

Steel Structures: Used to manufacture structural components such as H-beams, I-beams, channel steel, and angle steel for factories, warehouses, stadiums, bridges, and high-rise buildings.

Building Panels: Processed into corrugated sheets and sandwich panels for roofing and walls.

Infrastructure: Used to manufacture power transmission towers, guardrails, scaffolding, etc.

2. Automotive Manufacturing (Mainly using high-strength cold-rolled and hot-rolled coils)

Body Parts: Cold-rolled sheets are used to manufacture exterior parts such as doors, hoods, and trunk lids.

Structural Components and Chassis: High-strength hot-rolled sheets are used to manufacture load-bearing and safety components such as automotive beams, chassis frames, and wheel hubs.

3. Home Appliances and Hardware (Mainly using cold-rolled and galvanized coils)

Appliance Housings: Housings and internal structural components for refrigerators, washing machines, air conditioners, and microwave ovens.

Metal Furniture: Filing cabinets, bookshelves, bed frames, tables, and chairs.

Daily Hardware: Door and window hinges, tools, utensils, etc.

4. Container and Packaging Industry
Metal Packaging: Cold-rolled sheet metal, after tin plating (tinplate) or chrome plating, is used to manufacture food cans, beverage cans, chemical drums, aerosol cans, etc.

Containers: Container bodies are manufactured using weathering steel coils.

5. Machinery Manufacturing and Industrial Equipment
General Machinery: Manufacturing machine tool housings, gears, and shaft parts (usually using medium carbon steel).

Agricultural Machinery: Tractor and harvester bodies and components.

Mining Equipment: Conveyor belt supports, mining cars, etc.

6. Pipelines and Pipelines
Welded Pipes: Steel coils (usually hot-rolled coils) are cut, continuously rolled, and welded to form straight seam welded pipes, widely used in water, gas, and oil pipelines, as well as structural pipes (such as scaffolding pipes).

7. Surface-treated derivatives (significantly expanded applications)
Carbon steel coils undergo surface treatment, which enhances their performance and allows for more specialized applications:

Galvanized coils: Hot-dip galvanized or electro-galvanized, offering excellent corrosion resistance. Widely used in building roofs/walls (color-coated substrates), automotive parts, home appliances, and ventilation ducts.

Color-coated coils: A galvanized substrate coated with colored paint/PVDF film, aesthetically pleasing and weather-resistant, directly used in building envelopes (e.g., color-coated steel sheets for airports and stadiums).

Tin-plated/chrome-plated coils: Also known as tinplate, used for food packaging cans.

Electrical steel coils (silicon steel coils): Contains silicon, exhibiting excellent electromagnetic properties, a core material for manufacturing motor and transformer cores.

Support and Services:

The Carbon Steel Coil product technical support and services include:

• Expert guidance on product selection and usage
• Assistance with installation and maintenance
• Product training for customers and distributors
• 24/7 technical support for any product-related issues
• Product customization options to meet specific customer needs
• Quality assurance and testing to ensure the highest standards

Our team of experienced professionals is dedicated to providing exceptional support and service for all Carbon Steel Coil products.

Packing and Shipping:

Product Packaging:

The carbon steel coils will be securely packed in wooden pallets, wrapped with a moisture-resistant cover and strapped with steel bands to prevent any damage during transit.

Shipping:

The carbon steel coils will be shipped via a reliable carrier service to ensure timely and safe delivery. The shipping cost will be calculated based on the destination and weight of the order.