Wholesale Q345B / Q345C / Q345D / Q345E Hot Rolled Carbon Steel Coil – GB/T 1591 Structural Steel Coils for Construction & Fabrication Manufacturer and Supplier

Q345B / Q345C / Q345D / Q345E Hot Rolled Carbon Steel Coil – GB/T 1591 Structural Steel Coils for Construction & Fabrication

Short Description:

The Q345B / Q345C / Q345D / Q345E Hot Rolled Steel Coil is a high-strength, weldable structural carbon steel, manufactured to GB/T 1591, ideal for construction, machinery, bridges, and general fabrication

Standard: GB

Grade: Q345B / Q345C / Q345D / Q345E

Thickness: 2 – 20 mm,Customized

Width: 1000 – 2000 mm,Customized

Length: According to customer requirements

Certificate: ISO 9001:2015, SGS / BV / TUV / Intertek, MTC + Chemical & Mechanical Report

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Product Detail

Product Tags

Q345 Hot Rolled Carbon Steel Coil Product Introduction

Material Standard	Yield Strength
Q345B / Q345C / Q345D / Q345E Hot Rolled Carbon Steel Coil	≥345 MPa
Dimensions	Length
Thickness: 2 – 20 mm, Width: 1000 – 2000 mm, Coil Weight: 3–25 tons	Available in stock; customized lengths available
Dimensional Tolerance	Quality Certification
GB/T 1591	ISO 9001:2015, SGS / BV / Intertek Third-Party Inspection Report
Surface Finish	Applications
Hot rolled, pickled, oiled; optional anti-rust coating	Construction, bridges, pressure vessels, structural steel

Q345 Series Hot Rolled Steel Coil – Chemical Composition & Mechanical Properties

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
Q345B	≤0.20	0.8–1.6	≤0.50	≤0.035	≤0.035	≥345	470–630	≥20
Q345C	≤0.20	0.8–1.6	≤0.50	≤0.035	≤0.035	≥345	470–630	≥21
Q345D	≤0.20	0.8–1.6	≤0.50	≤0.035	≤0.035	≥345	470–630	≥22
Q345E	≤0.20	0.8–1.6	≤0.50	≤0.035	≤0.035	≥345	470–630	≥23

Standard Thickness & Width Range

Thickness (mm)	Width (mm)
2.0 – 3.0	1000 – 1250
3.0 – 6.0	1250 – 1500
6.0 – 12.0	1500 – 1800
12.0 – 20.0	1800 – 2000

Application-Oriented Thickness Guide

Thickness (mm)	Typical Use
2.0 – 3.0	Light structural parts, stamping, cold forming
3.0 – 6.0	Pipes, tubes, medium structural components
6.0 – 12.0	Heavy structural components, machinery bases
12.0 – 20.0	Bridge parts, steel frameworks, industrial fabrication

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Main Application

Construction Industry	General Engineering
Structural steel for buildings, bridges, and industrial plants.	Manufacturing of containers, storage tanks, and silos.
Manufacturing of steel frames, beams, and columns.	Fabrication of industrial platforms, fences, and frameworks.
Reinforcement plates, roofing sheets, and steel decks.	Suitable for welded constructions due to good weldability.

Mechanical and Manufacturing Industry	Key Advantages in Applications
Fabrication of machinery parts, automotive components, and equipment housings.	Excellent weldability and machinability.
Production of steel pipes and tubes.	Good elongation and toughness suitable for structural use.
Used in making welded structures and fabrication works requiring moderate strength.	Cost-effective and widely available in various sizes.

Metal Processing	Typical End Products
Cold bending and forming into sheets, strips, or plates.	Steel plates, strips, and sheets.
Surface coating and galvanization for corrosion-resistant applications.	Pipes, tubes, and profiles.
Roll forming into profiles, channels, and angles.	Machinery bases, frames, and industrial structures.

Royal Steel Group Advantage（Why Royal Group Stands Out for Americas Clients?）

1) Branch Office - Spanish-speaking support, customs clearance assistance, etc.

Hot-rolled steel coils the mainstay of the industrial field

2) Over 5,000 tons of stock in stock, with a wide variety of sizes

3) Inspected by authoritative organizations such as CCIC, SGS, BV, and TUV, with standard seaworthy packaging

Packing And Delivery

1️⃣ Bulk Cargo
works for large shipments. The coils are loaded directly onto ships or stacked with anti-slip pads between the base and the coil, wooden wedges or metal wires between coils and surface protection with rain-proof sheets or oil for rust prevention.
Pros: High payload, low cost.
Note: Specialized lifting gear is needed and condensation and surface damage must be avoided during haulage.

2️⃣ Containerized Cargo
Good for medium to small shipments. The coils are packed one by one with waterproofing and anti-rust treatment; a desiccant can be added in the container.
Advantages: Provides superior protection, easy to handle.
Drawbacks: Higher cost, decreased container loading volume.

Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.

We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling. This guarantees the H-beams from the factory all the way to the project site, helping you build on a solid foundation for a trouble free project!