Maintenance Considerations for HG785D High Strength Steel Plate

HG785D is a high-strength quenched and tempered steel plate with excellent mechanical properties, but proper maintenance is critical to preserve its performance and service life. Below are key  (maintenance considerations):

1. Corrosion Prevention

Surface Protection

Coating Inspection: Regularly check the anti-rust coating (e.g., zinc-rich primer, epoxy paint) for cracks, peeling, or blistering. Damaged areas expose the steel to moisture and accelerate corrosion.

Prompt Repairs: For minor coating damage:

Sand or grind the affected area to remove rust and loose paint (use 80–120 grit sandpaper).

Clean with acetone or alcohol to remove oil and debris.

Reapply the same type of primer and topcoat within 4 hours to prevent re-rusting.

Heavy Corrosion Treatment: For severe rust (e.g., pitting or thick rust layers):

Use shot blasting to achieve Sa2.5 standard (leaving a metallic matte surface).

Apply a two-coat system: zinc-rich primer (≥80μm) + epoxy topcoat (≥150μm).

Environmental Control

Storage Environment: Store plates in dry, ventilated areas away from direct rain, salt spray, or industrial pollutants. Use wooden pallets to lift plates ≥10 cm off the ground and avoid contact with concrete floors (which retain moisture).

Humidity Management: In high-humidity environments (RH >60%), use desiccants or dehumidifiers. For long-term storage, wrap plates in polyethylene moisture-proof film or apply volatile corrosion inhibitors (VCI paper).

2. Mechanical Damage Prevention

Handling and Storage

Avoid Scratches and Dents:

Use soft slings or rubber pads when lifting or moving plates to prevent surface abrasions.

When stacking, separate layers with wooden planks or rubber sheets to avoid friction. Limit stack height to ≤2 meters and ensure stable, non-tilting piles.

Stress Concentration Areas: Inspect cut edges, holes, and welds for micro-cracks (use magnetic particle inspection if necessary). Grind sharp edges to a radius of ≥2 mm to reduce stress corrosion risks.

 

 

 

 

 

 

 

Mechanical Properties

Thickness (mm)	Yield Strength ReL (MPa)	Tensile Strength Rm (MPa)	Elongation A (%)	Impact Energy KV2 (J at -20°C)
≤16	≥785	830–980	≥14	≥47
16–30	≥760	810–960	≥14	≥47
30–60	≥730	790–940	≥13	≥47

 

 

 

 

 

 

 

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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 HG785D High Strength 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.
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We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
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Our factory is committed to upholding the highest standards of safety and quality.
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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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