Applications

S355JR Z25 is ideal for welded structural components requiring thickness-direction integrity, such as:

(1) Heavy-Duty Construction

Bridges: Thick plate girders, box sections, and piers.

High-Rise Buildings: Columns, transfer plates, and seismic-resistant joints.

Example: A 30-story steel frame in an earthquake zone uses S355JR Z25 for critical welded connections.

(2) Mechanical Engineering

** Cranes and Heavy Machinery**: Base plates, welded frames, and load-bearing brackets.

Example: A 500-ton crawler crane's boom joint uses Z25 plates to withstand cyclic loading.

(3) Offshore and Marine Structures

Offshore Platforms: Jacket structures, hull sections, and welded nodes.

Example: A North Sea oil rig uses S355JR Z25 for thick-walled welded chambers.

(4) Industrial Equipment

Pressure Vessels: Plates for low-to-medium pressure tanks (with proper certification).

Steel Castings: Base plates for large industrial machines.

 

 

 

 

 

 

 

. Chemical Composition

(Typical values for thickness ≤16mm, EN 10025-2)

 

Element	Content (%)	Role
C	≤0.22	Balances strength and weldability (low carbon for ductility).
Si	≤0.55	Improves resistance to oxidation and enhances deoxidation.
Mn	≤1.60	Increases strength via solid solution hardening.
P/S	≤0.035	Reduces brittleness; strict control for impact and welding quality.
Nb/V/Ti	Optional (microalloying)	Refines grain structure for improved toughness (not always present in JR grade).

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our High Strength S355JR Z25 Low Alloy Carbon Steel Plate, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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