Black Steel Angle

Grade : Q195-Q420 Series
Sizes: 25×3,30×3,50×3or as required
Application: building structures and engineering structures, building beams, bridges, power transmission towers

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Description

Product Introduction

Black Steel Angle is a hot-rolled carbon steel profile with equal or unequal legs, widely used in construction, machinery, frames, brackets and structural support applications. It features high strength, good weldability, stable performance and cost efficiency. We provide standard sizes as well as customized dimensions to meet industrial and engineering project requirements.

Grade	Q195-Q420 Series
Tolerance	±1%
Alloy Or Not	Non-Alloy
Standard	AISI, ASTM, BS, DIN, GB, JIS
Surface	Galvanized, Bare, Black can be customized
Shaped	Equal, and unequal angel can be customized
Model Number	2.5-6.3#, can be customized
Length	1-12m/pc , can be customized
Thickness	2.9-5.7mm, can be customized
Processing Service	Welding, Punching, Cutting, Bending, Decoiling
Packing	Standard Seaworthy Packing
Application	building beams, bridges, power transmission towers, lifting and transporting machinery, warehouses Shelves ect.

Material & Chemical composition

Element	Typical Content Range	Main Function
Carbon (C)	≤ 0.22%	Ensures good weldability and toughness
Manganese (Mn)	0.30% – 0.65%	Deoxidizer; provides solid solution strengthening
Silicon (Si)	Low content	Deoxidizer
Phosphorus (P)	＜ 0.060%	Harmful impurity, controlled to reduce cold brittleness
Sulfur (S)	＜ 0.060%	Harmful impurity, controlled to reduce hot brittleness

Mechanical Performance Comparison of Black Angle Steel (Q235B vs Q345B)

We offer a wide range of angle steel grades to meet different project requirements, and custom material solutions are also available.Among them, Q235B and Q345B are our most popular and best-selling products, widely trusted by customers for their reliable performance and cost-effectiveness.

Item	Q235B	Q345B
Yield strength	≥ 235 MPa	≥ 345 MPa
Tensile strength	375–500 MPa	470–630 MPa
Elongation	≥ 26%	-
Cold bending performance	180° bending, no cracks	-
Weldability	Good, suitable for arc welding, gas shielded welding	Good
Low-temperature toughness	-	≥ 34 J at -40°C
Atmospheric corrosion resistance	Reference base	Improved by 30%–40% vs Q235B
Load capacity	General	Higher, can bear larger loads

Manufacturing Process

Stable & Mature Production Flow
Our black steel angle production adopts a mature and standardized process flow, including steel smelting, continuous casting, hot rolling and controlled cooling. The stable procedure ensures high consistency between batches, reducing quality fluctuations and meeting long-term project supply demands.

Precise Hot Rolling & Forming
Heated above 1000°C in a high-temperature furnace, steel billets achieve excellent plastic deformation. Through multi-pass rolling and forging, we accurately form the angle section and tightly control dimensional tolerance. This ensures straightness, clear angles and stable cross-section performance.

Controlled Cooling to Avoid Defects
We apply controlled cooling to minimize internal stress. This effectively prevents deformation, bending and cracking during and after production, improving overall structural stability.

Full-Process Parameter Monitoring
Temperature, pressure, speed and other key parameters are strictly monitored throughout production. Real-time control guarantees that mechanical properties, appearance and dimensions fully meet international standards and customer specifications.

angle steel prodcution line 2

Application Fields of Black Angle Steel

Widely used in:

Construction

Steel structure brackets, floor beams, and wall frames.

Machinery

Equipment frames, transmission supports, and workpiece fixtures.

Infrastructure

Highway guardrails, power tower components, and pipeline supports.

Manufacturing

Storage racks, container skeletons, and agricultural machinery parts.

photobank 4

Key Features of Black Angle Steel

Excellent structural strength and load-bearing performance, ideal for construction and engineering support.

Good weldability and machinability, enabling easy processing, fabrication and on-site installation.

Strict production control ensures stable mechanical properties, high dimensional accuracy and low deformation.

Cost-effective and widely applicable, available in equal/unequal legs with customizable lengths.

packing and delivery

Packaging & Transportation

Careful Packaging for Every Order

Each bundle is tightly secured with steel strips and protected against rust and moisture, ensuring your angle steel arrives in perfect condition, no matter the order size.

Customer‑Oriented Loading & Logistics

We arrange safe, stable loading suitable for sea and land transportation, minimizing damage risk and making unloading and handling more efficient for you.

Consistent Quality Service for Every Client

We treat every customer with the same high standard: precise bundling, clear labeling, and reliable logistics, delivering peace of mind for all your shipments.

Why you choose us

Professional Production & Strong Capacity

With years of industry expertise and standardized production lines, we guarantee stable quality, precise dimensions, and reliable supply capacity for both small orders and large bulk projects.

Competitive Pricing & Thoughtful Service

We offer factory-direct competitive pricing without compromising quality. Our dedicated customer service team provides efficient communication, flexible solutions, and attentive support from inquiry to delivery.