StE420 Low Alloy High Strength Steel

Basic Properties

StE420 is a low-alloy high-strength structural steel compliant with German standard DIN 17102 (and its European equivalent EN 10149-2 for hot-rolled products). The designation "StE" originates from "Stahl für Erschütterungsbeanspruchung" (steel for dynamic loading), emphasizing its suitability for applications requiring resistance to impact, fatigue, and high stress.

 

Key Characteristics:

High strength-to-weight ratio.

Good ductility and toughness, even under dynamic or cyclic loads.

Versatile across temperatures, with variants for low-temperature service (e.g., TStE420 for -50°C impact resistance).

Note: The provided composition in the user's query (C: 0.30–0.37%) may refer to a different steel grade (e.g., medium-carbon structural steel). StE420 typically maintains low carbon (<0.20%) to prioritize weldability, as shown in the table above.

 

 Mechanical Properties

Property	Typical Values (Thickness ≤16mm)	Low-Temperature Variant (TStE420)
Yield Strength (ReH)	≥420 MPa	≥420 MPa (impact tested at -50°C)
Tensile Strength (Rm)	500–680 MPa	520–700 MPa
Elongation (A5)	≥18%	≥18%
Impact Toughness	≥27 J at +20°C (V-notch)	≥27 J at -50°C

 

Delivery States:

Hot-Rolled (AR): Cost-effective for non-critical applications.

Normalized (N): Uniform microstructure with improved toughness.

Quenched and Tempered (Q+T): Higher strength and hardness for demanding loads.

 

 

 

 

 

Applications

StE420's combination of strength, toughness, and processability makes it ideal for:

 

Construction:

Industrial  (factory buildings), commercial high-rise frameworks, and load-bearing beams.

Bridges and infrastructure requiring resistance to dynamic loads (e.g., traffic, wind).

Engineering Machinery:

Excavator arms, loader buckets, and crane booms.

Mining equipment: Drilling rigs, dump truck frames, and coal mine hydraulic supports.

 

 

 

 

 

 

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 StE420 Low Alloy High Strength Steel, 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.
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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