Product Overview
Q345GNH Wearhering Steel Plate is a high-strength, low-alloy atmospheric corrosion-resistant steel, produced in accordance with the Chinese standard GB/T 4171.
Q345 – Minimum yield strength of 345 MPa
GNH – Denotes enhanced weathering performance and specific surface treatment requirements
By adding copper, chromium, nickel, and other alloying elements, this steel forms a stable and dense oxide protective layer in outdoor environments, significantly improving its atmospheric corrosion resistance.
Unlike ordinary carbon steel, Q345GNH Wearhering Steel Plate requires less frequent maintenance and can retain its appearance and performance for decades in harsh conditions.
Specifications
|
Item |
Details |
|
Standard |
GB/T 4171, ASTM, EN, JIS |
|
Equivalent Grades |
S355J0WP, SPA-H, 09CuPCrNi-A |
|
Material Options |
A588, A242, A606, A871, A709 |
|
Thickness |
1.5 – 100 mm |
|
Width |
1000 – 3000 mm |
|
Length |
As required |
|
MOQ |
25 tons |
|
Supply Ability |
10,000 tons/month |
|
Shape |
Plate & Coil |
|
Packing |
Standard export seaworthy packing |
Mechanical Properties
|
Property |
Specification |
|
Yield Strength |
≥ 345 MPa |
|
Tensile Strength |
470 – 630 MPa |
|
Elongation |
≥ 20% |
|
Charpy Impact Energy |
≥ 27 J (−20 °C) |
|
Hardness |
HB 130 – 180 |
Manufacturing Process & Quality Control
Steelmaking – Smelted in converter or electric furnace with precise alloying additions
Hot Rolling – High-temperature rolling ensures uniform structure and smooth surface
Surface Treatment – Pickling, polishing, or special oxidation to enhance rust layer formation
Quality Inspection – Dimensional accuracy, tensile strength, impact toughness, and surface defect testing
Optional Coating – For extreme marine or chemical environments
Applications
Q345GNH Wearhering Steel Plate is widely used in architecture, infrastructure, and industrial manufacturing, including:
Building Facades & Cladding – Natural rust finish for modern architectural aesthetics
Roofing & Landscape Design – Durable and weatherproof for long-term outdoor exposure
Bridges & Structural Supports – High load-bearing capacity with reduced maintenance cost
Transportation Equipment – Railway carriages, shipping containers, truck frames
Industrial Equipment – Machinery casings, equipment housings, outdoor installations
Public Facilities – Sculptures, park benches, signage, and other urban design elements
Advantages of Q345GNH Wearhering Steel Plate
Long Service Life – Self-protecting rust layer significantly slows corrosion
Low Maintenance – No frequent repainting required
Eco-Friendly – Reduced use of coatings and chemicals
Versatile Design – Can be left unpainted or finished for customized appearance
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