What is EN 10025 s420nl steel equivalent to?

S420NL Equivalent ASTM Steel

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025-3 compliant materials, including the versatile S420NL steel grade. S420NL is a normalized fine-grain structural steel designed for welded constructions requiring enhanced toughness at low temperatures, down to -50°C. Ideal for heavy-duty applications in bridges, cranes, and offshore structures, our S420NL plates are delivered in normalized or normalized rolled conditions to ensure superior weldability and impact resistance. For a comprehensive overview of our en 10025 3 normalized steel plate offerings, explore our full range.

What is S420NL Steel?

S420NL steel, designated as 1.8912 under the European standard EN 10025-3, belongs to the family of weldable fine-grain steels. The "NL" suffix indicates its suitability for normalized delivery with a minimum impact energy of 27 Joules at -50°C in the longitudinal direction, making it perfect for cold climates and demanding environments. Compared to similar grades like en 10025 3 s420n normalized structural steel plate, S420NL offers improved low-temperature performance without compromising on strength.

Gangsteel produces S420NL plates in thicknesses up to 250 mm, with precise control over chemical composition to meet CEV limits for optimal weldability. Our plates are rigorously tested to comply with international standards, ensuring reliability for global projects.

S420NL Steel Equivalent ASTM

The ASTM equivalent to S420NL is A633 Grade C (ASTM A633/A633M), a normalized high-strength low-alloy structural steel with 345 MPa yield (for thicknesses ≤65 mm) and good low-temperature toughness (27 J at -40°C, which can be specified to -50°C). A572 Grade 60 (415 MPa yield) is also close, but A633 Gr. C better matches the low-temperature requirements. Substitution requires verifying impact testing and CEV for offshore or cold applications.

Why Choose Gangsteel for S420NL Steel?

With state-of-the-art mills and a commitment to ISO-certified quality, Gangsteel delivers S420NL plates tailored to your specifications. Stocked in various sizes and ready for immediate export worldwide. For detailed pricing and availability, visit our en 10025 3 s420nl normalized structural steel plate product page or contact our sales team today.

Summary

The ASTM equivalent to S420NL is A633 Grade C — matching ~370–420 MPa yield, 520–680 MPa tensile, and low-temperature toughness when specified. Both are ideal for welded structures in cold environments, with A633 Gr. C serving as a reliable substitute in US-standard projects. S420NL from Gangsteel ensures seamless sourcing with certified plates for optimal performance.

FAQ

What is the ASTM equivalent to S420NL?

A633 Grade C (ASTM A633/A633M) is the closest, with 345 MPa yield and low-temperature toughness; specify -50°C impact for full equivalence.

How do S420NL and A633 Gr. C differ chemically?

S420NL has higher Mn (1.00–1.70% vs 1.15–1.50%) and Ni (0.80% vs -), with similar CEV (~0.45–0.48) for weldability.

Are their mechanical properties identical?

A633 Gr. C has lower yield (345 MPa vs 370–420 MPa) but higher elongation (23% vs 18–19%). Impact at -50°C aligns if specified for A633.

Can A633 Gr. C replace S420NL in cold environments?

Yes, if normalized and tested for 27 J at -50°C, A633 Gr. C matches S420NL for applications like bridges or offshore platforms.

What if I need a higher-strength ASTM equivalent?

For S460NL, use A633 Grade D/E or A709 Grade 50W; contact Gangsteel for cross-standard guidance.