High Strength Low Alloy Steel Plate St52

1. Grade Overview

St52 is a high-strength low alloy steel grade widely used in Europe, primarily compliant with DIN EN 10025-2 (Structural Steels) and its subsequent revisions (e.g., EN 10025-3/4 for improved toughness). The designation "St52" is historical, and modern standards often use S355 (e.g., S355JR, S355J2) as the primary classification. However, "St52" is still commonly referenced in industries like construction, machinery, and pipelines.

 

Key Equivalence:

St52-3 (old DIN standard) ≈ S355JR (EN 10025-2) or S355J2 (EN 10025-3, with better impact toughness).

"St52" generally refers to steel with a minimum yield strength of 355 MPa (for thickness ≤16mm).

2. Chemical Composition (Typical Values, EN 10025-2)

Element	Content Range (%)	Role
Carbon (C)	≤0.22	Balances strength and weldability; lower carbon for thick sections.
Manganese (Mn)	1.00–1.60	Enhances strength and hardenability; acts as a deoxidizer.
Silicon (Si)	≤0.55	Improves resistance to oxidation and minor strengthening.
Phosphorus (P)	≤0.035	Controlled to prevent embrittlement and improve ductility.
Sulfur (S)	≤0.035	Minimized to reduce hot cracking during welding.
Microalloying (Nb, V, Ti)	≤0.10 total	Refines grains and enhances toughness (common in modern S355 grades).

 

Note: Modern S355 grades often use microalloying (e.g., Nb, V) to meet toughness requirements, unlike older St52 grades which relied on higher carbon.

 

 

 

 

 

 

 

3. Mechanical Properties (Thickness ≤16mm)

Property	Requirement (EN 10025-2, S355JR)	Requirement (EN 10025-3, S355J2)
Yield Strength (ReH)	≥355 MPa	≥355 MPa
Tensile Strength (Rm)	470–630 MPa	470–630 MPa
Elongation (A)	≥22%	≥22%
Impact Toughness (KV2)	27 J at +20°C (JR)	27 J at -20°C (J2)

 

Key Differences:

St52-3 (old) ≈ S355JR (room-temperature impact).

St52-5 (old) ≈ S355J2 (low-temperature impact at -20°C).

 

 

 

 

 

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 Low Alloy Steel Plate St52 Price, 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.

Hot Tags: high strength low alloy steel plate st52 price, China high strength low alloy steel plate st52 price suppliers, factory, CR240LA, CR1 Steel, HR500LA, HR0 Steel, CR210IF, CR2 Steel