Product Specification

Laser Cutting 904L Stainless Steel Plate Hot Rolled 1.5 - 50.0mm Alloy N08904 For Chemical Industrial

Laser Cutting 904L Stainless Steel Plate Hot Rolled 1.5 – 50.0mm Alloy N08904 For Chemical Industrial

Overview

904L stainless steel (UNS N08904, EN 1.4539) is a high-alloy, low-carbon super austenitic stainless steel specifically engineered for exceptional corrosion resistance in aggressive chemical environments. With its unique composition—featuring elevated levels of chromium, nickel, molybdenum, and copper—904L offers superior performance against pitting, crevice corrosion, stress corrosion cracking (SCC), and uniform corrosion, particularly in sulfuric, phosphoric, and organic acids.

Our hot-rolled 904L stainless steel plates, available in thicknesses from 1.5 mm to 50.0 mm, are ideal for precision laser cutting in demanding sectors such as chemical processing, oil & gas, pharmaceuticals, flue gas desulfurization (FGD), and seawater systems. These plates combine excellent formability with outstanding weldability and machinability, making them a reliable choice for complex fabrications requiring both structural integrity and long-term corrosion resistance.

Key Features & Benefits

• ✅ Exceptional Corrosion Resistance: Resists sulfuric acid up to 40°C across 0–98% concentrations; highly effective in chloride-rich and acidic environments.
• ✅ Laser-Cutting Ready: Uniform microstructure and consistent surface quality ensure clean, precise cuts with minimal dross or thermal distortion.
• ✅ Low Carbon Content (≤0.02%): Eliminates risk of intergranular corrosion after welding—no post-weld heat treatment required.
• ✅ High PREN Value (33–36): Pitting Resistance Equivalent Number calculated as PREN = %Cr + 3.3×%Mo + 16×%N, ensuring top-tier resistance to localized corrosion.
• ✅ Excellent Fabrication Properties: Suitable for bending, stamping, machining, and all standard welding techniques (TIG, MIG, SMAW).
• ✅ Certified Compliance: Meets international standards including ASTM A240, ASME SA-240, EN 10028-7, ISO 9328-7, and JIS G 4304.

Chemical Composition (Weight %)

Note: Exact composition may vary slightly per batch but remains within ASTM/EN tolerance limits.

Mechanical Properties (Typical at Room Temperature)

These properties ensure structural reliability under mechanical load while maintaining ductility for forming and laser processing.

Physical Properties

The low thermal conductivity and high expansion coefficient require controlled laser parameters to minimize warping—our plates are optimized for industrial fiber and CO₂ laser systems.

Laser Cutting Compatibility

904L hot-rolled plates are fully compatible with modern fiber laser cutting machines (1–12 kW). Due to its high alloy content, optimal cutting parameters include:

• Assist Gas: High-purity nitrogen (for oxide-free edges) or oxygen (for thicker sections >25mm).
• Cutting Speed: Adjusted based on thickness; e.g., ~1.2 m/min for 10mm plate at 6 kW.
• Focus Position: Slightly below surface for thick plates to maintain kerf consistency.
• Edge Quality: Smooth, burr-free edges suitable for direct welding or assembly—reducing post-processing costs.

Tip: Pre-cleaning the surface (removing mill scale or oil) significantly improves cut quality and reduces nozzle wear.

Common Applications in Chemical Industry

904L outperforms 316L and 317L in chloride environments and offers a cost-effective alternative to nickel-based alloys like Hastelloy® C-276.

Available Specifications

We offer laser profiling services—from simple blanks to complex geometries—with nesting optimization to reduce material waste.

Why Choose 904L Over Other Stainless Steels?

For chemical plants handling dilute acids or chlorides above 60°C, 904L provides unmatched longevity and safety.

Handling & Fabrication Tips

• Welding: Use matching filler metals (e.g., ER385 or E385-16). No preheat needed; keep interpass temp <100°C.
• Machining: Use sharp carbide tools, high feed rates, and sulfurized/chlorinated coolants to combat work hardening.
• Storage: Keep dry and separate from carbon steel to avoid iron contamination.
• Cleaning: Passivation with nitric or citric acid enhances corrosion resistance post-fabrication.

Sustainability & Recyclability

904L stainless steel is 100% recyclable and contains up to 60% recycled content. Its long service life in corrosive environments reduces replacement frequency, lowering lifecycle emissions—aligning with ESG goals in chemical manufacturing.

Order Information

We supply certified 904L hot-rolled plates globally with:

• Fast lead times (stock & mill-direct)
• Custom laser cutting (DXF/DWG accepted)
• Full traceability (heat number, chemistry, mechanicals)
• Competitive pricing for bulk orders (MOQ: 100 kg)

Contact us today for a quote, sample, or technical consultation. Let our 904L plates power your next corrosion-resistant project with precision and reliability.

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