GB/T Q355NH Q355NH Weather Resistant Steel Q355NH Hot Rolled Steel Plate Sheet

Description: Q355NH Weather Resistant Steel is a high-performance, low-alloy structural steel designed for superior atmospheric corrosion resistance. Widely utilized in industries such as construction, transportation, and energy, this steel grade, standardized under G...

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Q355NH Corrosion Resistant Steel Description

Q355NH Weather Resistant Steel is a high-performance, low-alloy structural steel designed for superior atmospheric corrosion resistance. Widely utilized in industries such as construction, transportation, and energy, this steel grade, standardized under GB/T 4171, offers a unique combination of strength, durability, and cost-effectiveness. Its ability to form a protective rust layer when exposed to the atmosphere makes Q355NH Corrosion Resistant Steel an ideal choice for outdoor structures, reducing maintenance costs and enhancing longevity.

Q355NH Corrosion Resistant Steel is widely employed in industries requiring durable, low-maintenance materials. Its applications include railway cars, transmission towers, shipping containers, and architectural facades. The steel’s ability to resist corrosion in marine, urban, or industrial atmospheres makes Q355NH Weather Resistant Steel a preferred option for long-lasting structures. Its high strength and ease of fabrication also support innovative designs, enhancing both functionality and aesthetic appeal in modern construction.

Q355NH Corrosion Resistant Steel Datasheet

Thickness: 3 mm to 100 mm
Width: Up to 2500 mm
Length: Up to 12000 mm

Q355NH Corrosion Resistant Steel Chemical composition

The chemical composition of Q355NH Weather Resistant Steel is carefully engineered to enhance its corrosion resistance and mechanical strength. The addition of trace alloying elements ensures optimal performance in atmospheric conditions. Below is a detailed breakdown of its chemical composition:

Element	Max Content (%)
Carbon (C)	≤0.16
Silicon (Si)	0.10–0.50
Manganese (Mn)	0.50–1.50
Phosphorus (P)	≤0.030
Sulfur (S)	≤0.030
Copper (Cu)	0.25–0.55
Chromium (Cr)	0.40–0.80
Nickel (Ni)	≤0.65
Niobium (Nb)	0.015–0.060
Vanadium (V)	0.02–0.12
Titanium (Ti)	0.02–0.10

Q355NH Corrosion Resistant Steel Mechanical Properties

Q355NH Corrosion Resistant Steel is engineered for high strength and toughness, with a minimum yield strength of 355 MPa and tensile strength ranging from 490 to 630 MPa. Its robust mechanical properties, combined with excellent low-temperature impact resistance, make it suitable for extreme conditions. The table below outlines its mechanical properties:

Property	Value
Yield Strength (MPa)	≥355 (≤16mm thickness)
Tensile Strength (MPa)	490–630
Elongation (%)	≥21
Impact Toughness (J, -20°C)	≥34 (for grades C, D, E)

These attributes make Q355NH Weather Resistant Steel a dependable material for structures requiring both strength and resilience in adverse weather conditions.

Equivalent Grade of Q355NH Corrosion Resistant Steel

Q355NH Weather Resistant Steel aligns with several international standards, enabling its use in global projects. Equivalent grades offer comparable corrosion resistance and mechanical properties, ensuring flexibility in material selection. The following table lists common equivalents: