High-Strength Low-Alloy Steel For Automotive Industrial Applications

High-Strength Low-Alloy Steel For Automotive Industrial Applications

HC340LA is a cold-rolled, galvanized low-alloy steel grade designed for superior strength and corrosion resistance. The zinc coating layer effectively prevents surface oxidation, extending product lifespan in harsh environments. It is widely used in automotive structural parts, industrial equipment, and precision components requiring high formability and durability .
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Description

Key Features & Benefits

 

Characteristic Category

Specific Information

Enhanced Corrosion Resistance

HC340LA galvanized steel sheet forms a uniform, dense zinc layer via hot-dip galvanizing. The zinc layer acts as a sacrificial anode, providing electrochemical protection to the steel substrate and effectively slowing corrosion. Zinc coating weight is customizable (common range: 60-275g/m², double-sided). With strong adhesion, the coating resists peeling during bending/stamping, ensuring good corrosion resistance in complex conditions. Suitable for auto chassis, home appliance casings, etc.

High Strength & Formability

As a low-alloy high-strength steel, it has a yield strength ≥340MPa and tensile strength 420-520MPa, offering high load-bearing capacity. Advanced smelting and rolling (e.g., controlled rolling/cooling) balance strength and formability, with elongation ≥20%, good cold bending (180° bend without cracks) and deep drawing performance. Meets stamping needs for complex parts, used in auto structural components (e.g., door anti-collision beams, seat frames).

Customizable Specifications

Thickness: 0.8-3.0mm; width: 800-1500mm (adjustable); length: cut-to-length (e.g., 2000mm, 3000mm) or coil supply. Customizable options include zinc coating type (GI, GA), surface treatment (passivation, oiling), mechanical properties (negotiable for some indices), and surface quality grades. Adapts to automotive, home appliance, construction, etc., improving material utilization and adaptability.

Technical Specifications

 

Parameter

Details

Material Standard

EN 10346; Equivalent to CR340LA (cold-rolled variant)

Coating Mass

Standard: 50–140 g/m² (both sides); Optional single-side/differential coating

Processing

Cold-rolled from hot-rolled coils, followed by acid pickling and galvanizing

Chemical Composition

Low C, Mn, with micro-alloying elements (e.g., Ti, Nb) for strength

Applications

Automotive: Body panels, seat frames, bumpers.

Industrial: Solar mounting systems, electrical cabinets, agricultural machinery.

Consumer Goods: HVAC components, appliance housings.

 Why Choose HC340LA?

Cost-Effective: Zinc coating offers long-term corrosion protection at lower lifecycle costs.

Eco-Friendly: Recyclable material aligning with sustainable manufacturing standards.

Supply Flexibility: Available as coils, sheets, or custom-cut parts.

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Quality Assurance

Produced by Baosteel (China's leading steel manufacturer).

Complies with ISO 9001 and automotive industry standards (e.g., IATF 16949).

Mill test certificates provided upon request.

FAQ

Q: What are the core advantages of HC340LA hot-dip galvanized steel sheet?

A: The core lies in the dual properties of "high strength + corrosion resistance". It has a yield strength of ≥340MPa, and the hot-dip zinc coating can slow down rusting, while also balancing formability such as cold bending and stamping.

Q: What fields is it mainly used in?

A: It is mainly used for automotive structural parts (e.g., door anti-collision beams, seat frames), and also suitable for scenarios requiring corrosion resistance and strength, such as home appliance casings and light machinery guards.

Q: What are the common specifications of the zinc coating?

A: The weight of the double-sided zinc coating is mostly 60-275g/m², which can be customized according to rust prevention needs. 80-120g/m² is commonly used in regular scenarios.

Q: Can it withstand complex stamping processes?

A: Yes. Its elongation after fracture is ≥20%, and it supports 180° cold bending without cracks, which can meet the stamping needs for complex shapes of automotive parts and other components.

Q: What is the difference between it and ordinary cold-rolled steel sheets?

A: Compared with ordinary cold-rolled steel, it has an additional hot-dip zinc coating (for corrosion prevention) and higher strength (the yield strength of ordinary cold-rolled steel is mostly ≤250MPa), but the cost is slightly higher.

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