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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Pipe & Tube > S355JR Grade Welded Square Steel Pipe for Heavy Load Structures

S355JR Grade Welded Square Steel Pipe for Heavy Load Structures

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Product Spotlights

Manufactured from EN 10025 certified S355JR steel, these welded square pipes deliver ≥355 MPa yield strength for critical structural applications. Precision-welded with customizable dimensions (20-500mm) and optional galvanized coating. Produced under ISO9004/14000 certified processes with global export experience. Ideal for heavy-load frameworks, industrial buildings, and infrastructure projects requiring verified material traceability and dimensional accuracy.

Negotiable MOQ: 1 Ton (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Other, S355JR Carbon Steel

Type:

Welded

Surface Treatment:

Other, Optional (Black/Galvanized)

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Hunan Yige Special Steel Science Technology Co.,Ltd

2Yrs

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Material Other, S355JR Carbon Steel

Type Welded

Surface Treatment Other, Optional (Black/Galvanized)

Shape Square

Application Heavy Load Structures

Steel Grade Standard EN 10025

Size Range Customizable

Wall Thickness Customizable

Length 6m/12m or Custom

Certification ISO9004, ISO14000 Certified

As a professional steel manufacturer since 2015, Hunan Yige Special Steel leverages our 5,000-10,000㎡ Changsha facility to produce premium S355JR welded square pipes engineered for critical structural applications. These high-strength square hollow sections deliver exceptional load-bearing capacity for construction projects requiring uncompromising safety and durability.

Core Technical Advantages:

Material Excellence: S355JR non-alloy structural steel provides minimum 355 MPa yield strength with excellent impact resistance at ambient temperatures
Precision Welding: High-frequency electric resistance welding (HFW) ensures consistent seam integrity and dimensional accuracy
Mechanical Properties:

Property	Value
Yield Strength	≥355 MPa
Tensile Strength	470-630 MPa
Elongation at Break	≥22%
Impact Test Temperature	+20°C (27J min)

Configuration Flexibility:

Standard sizes: 20×20mm to 500×500mm with wall thickness 1.5-20mm
Custom dimensions available with tolerance control to EN 10219 standards
Surface options: Mill finish, sandblasted, or hot-dip galvanized (150-200g/㎡ coating)

Our pipes undergo rigorous quality validation including ultrasonic testing, hydraulic pressure examination, and dimensional verification. The square profile optimizes structural efficiency in:

Industrial building frameworks and support columns
Bridge components and heavy machinery bases
Offshore platform structures and crane booms

Backed by ISO9004 and ISO14000 certifications, we serve global clients across North America, Europe, Asia, and 15+ other markets from our Hunan manufacturing hub. With proven expertise in structural steel solutions since 2015, we guarantee:

Third-party test reports available for material traceability
Custom cutting and bundling for efficient installation
Technical support for structural design optimization

FAQ:

Q1: What distinguishes S355JR from other structural steels?
A1: S355JR offers superior notch toughness at room temperature with verified impact energy absorption, making it ideal for dynamic loading environments.

Q2: Are custom wall thicknesses available?
A2: Yes, we produce thicknesses from 1.5mm to 20mm according to project specifications.

Q3: What corrosion protection options exist?
A3: Standard mill finish for indoor use; galvanized coating available for outdoor/corrosive environments.

Q4: How are dimensional tolerances controlled?
A4: We maintain EN 10219-2 dimensional tolerances with automated laser measurement systems.

Q5: Can you provide material certification?
A5: Full EN 10204 3.1 mill certificates with chemical composition and mechanical test data included.

Q6: What packaging is used for export?
A6: Weather-resistant wrapping with steel strapping on wooden pallets, optimized for container loading.

Product Tags: S355JR Square Hollow Section , Welded Structural Steel Tube , Heavy Duty Square Steel Pipe