S460NH Steel Overview

S460NH Steel Overview

At Gangsteel, we’re excited to introduce S460NH steel, a high-strength, low-alloy structural steel under EN 10025-5, specifically designed for pressure vessel applications with enhanced atmospheric corrosion resistance. Known for its fine-grain structure, excellent weldability, and durability in harsh environments, S460NH steel is a top choice for boilers, storage tanks, and offshore pressure vessels.

As part of the en 10025 3 normalized steel plate family, S460NH offers a minimum yield strength of 460 MPa and -20°C toughness, making it reliable for moderate climates. Gangsteel provides a detailed overview of S460NH steel’s specifications, chemical composition, mechanical properties, and applications, comparing it to grades like en 10025 3 s420n normalized structural steel plate and en 10025 3 s355n normalized structural steel plate. For more details, visit our en 10025 3 s460n normalized structural steel plate page.

What is S460NH Steel?

S460NH steel is a high-strength structural steel under EN 10025-5, with a minimum yield strength of 460 MPa for plates up to 16 mm thick. Its designation breaks down as:

• S: Structural steel.
• 460: Minimum yield strength in MPa.
• NH: Normalized or normalized rolled, tested for impact toughness at -20°C, with enhanced atmospheric corrosion resistance.

The normalization process refines the grain structure, enhancing S460NH steel’s strength, toughness, and weldability, while alloying elements like copper provide corrosion protection. Compared to en 10025 3 s355n normalized structural steel plate, S460NH offers higher strength and corrosion resistance for pressure vessel demands.

Chemical Composition of S460NH Steel

Gangsteel ensures S460NH steel meets EN 10025-5 chemical composition standards for optimal performance:

Key Elements:

• Low Carbon: 0.20% max ensures clean welds and toughness.
• Manganese: 1.00-1.70% boosts strength for heavy structures.
• Copper: 0.55% enhances atmospheric corrosion resistance, a key S460NH feature.
• Aluminum & Niobium: Refine grains for toughness.
• Low Sulfur & Phosphorus: Minimize inclusions for superior weld quality.

The Carbon Equivalent (CEV) is capped at 0.48% for plates up to 63 mm, calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, ensuring weldability, similar to en 10025 3 s420n normalized structural steel plate.

Mechanical Properties of S460NH Steel

Gangsteel guarantees S460NH steel’s mechanical properties excel in pressure vessel applications:

• Yield Strength: Starts at 460 MPa for thin plates, ideal for pressure vessels.
• Tensile Strength: 540-720 MPa ensures durability under pressure.
• Elongation: ≥17% supports forming in vessel fabrication.
• Impact Toughness: ≥27 J at -20°C ensures reliability in moderate climates, outperforming en 10025 3 s355n normalized structural steel plate.
• Hardness: Typically 170-210 HB (Brinell), balancing machinability and corrosion resistance.

Delivery Conditions and Specifications

Gangsteel provides S460NH steel with specifications outlined in EN 10025-5:

• Standard: EN 10025-5:2019 (weathering steels).
• Condition: Normalized or normalized rolled for consistent microstructure.
• Thickness Range: 6–200 mm, with custom options up to 250 mm.
• Widths: 2000, 2500, or 3000 mm.
• Lengths: Up to 12,000 mm.
• Surface: Hot-rolled, with enhanced corrosion resistance; optional priming.
• Certifications: EN 10204 3.1/3.2 certificates, ultrasonic testing (UT) per EN 10160, and approvals from ABS, LR, BV, or DNV for pressure vessel use.
• Z-Quality: Optional Z15, Z25, or Z35 per EN 10164 for through-thickness properties, similar to en 10025 3 s420n normalized structural steel plate