Docol Tube 420LA | High-Strength Automotive Steel Tubes
2025-09-02
Docol Tube 420LA | High-Strength Automotive Steel Tubes

Docol Tube 420LA is a high-strength low-alloy (HSLA) steel tube designed for lightweight construction and superior formability. It offers excellent crash performance, dimensional accuracy, and weldability, making it a preferred material in the automotive, transportation, and engineering sectors.

Produced by SSAB, this material is part of the Docol advanced high-strength steel (AHSS) family, known for its uniform quality, advanced forming properties, and consistent mechanical performance.


Key Features of Docol Tube 420LA

  • High Strength: Yield strength ~420 MPa for structural integrity.

  • Lightweight: Enables weight reduction while maintaining strength.

  • Excellent Formability: Suitable for bending, laser cutting, and stamping.

  • Consistent Quality: Manufactured with tight dimensional tolerances.

  • Good Weldability: Supports multiple welding techniques for automotive assembly.


Chemical Composition (Typical)

ElementContent (%)
Carbon (C)≤ 0.12
Manganese (Mn)1.0 – 1.5
Silicon (Si)≤ 0.50
Phosphorus (P)≤ 0.025
Sulfur (S)≤ 0.010
Niobium/TitaniumMicro-alloyed for strength

Mechanical Properties

PropertyValue
Yield Strength~420 MPa
Tensile Strength~500 MPa
Elongation~20%
Impact ToughnessExcellent

Applications of Docol Tube 420LA

Docol 420LA steel tubes are widely used in industries that demand strength, safety, and precision:

  • Automotive Chassis & Safety Components: Bumper systems, seat frames, crash boxes.

  • Lightweight Engineering Structures: Roll cages, frames, machinery components.

  • Agricultural Equipment: Durable and lightweight tubing for heavy-duty use.

  • Construction Equipment: Hydraulic arms, support beams, and precision parts.


Why Choose Docol Tube 420LA?

  • Weight Savings: Reduce vehicle mass for better fuel efficiency.

  • Crash Safety: Superior energy absorption and deformation control.

  • Sustainability: Produced with reduced CO₂ emissions.

  • Global Availability: Supported by SSAB’s worldwide distribution network.


Docol Tube 420LA vs. Other Steel Tubes

Steel TypeYield StrengthApplication Focus
Docol Tube 420LA~420 MPaAutomotive, Safety, Engineering
Mild Steel Tubes~250 MPaGeneral fabrication
Docol Tube 500LA~500 MPaHeavy-duty and high-stress applications


Docol Tube 420LA is the go-to choice for industries that demand high-strength, lightweight steel solutions. Whether you are designing automotive safety parts or lightweight structures, this steel offers the perfect balance of performance, precision, and cost-effectiveness.

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