Precision Slit 304L Stainless Steel Strip

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Product Introduction

Precision Slit 304L Stainless Steel Stripis a low-carbon austenitic chromium-nickel alloy flat product engineered for applications requiring high weldability and resistance to intergranular corrosion. The controlled carbon content (C <= 0.030%) prevents carbide precipitation during welding processes up to 800°F (427°C), eliminating the need for post-weld annealing in most service environments. Produced via advanced cold-rolling and precision-annealing lines, these sheets maintain tight thickness tolerances, uniform mechanical properties, and clean surface finishes suited for industrial fabrication and equipment manufacturing.

Key Features

Weldability: Extra-low carbon chemistry allows heavy-gauge welding without risking intergranular corrosion in the heat-affected zone (HAZ).

Dimensional Precision: Cold-rolled processing achieves thickness tolerances tighter than standard ASTM specifications, minimizing scrap rates during laser cutting and stamping.

Corrosion Resistance: Contains a minimum of 18.0% chromium and 8.0% nickel, providing reliable performance in mild atmospheric, organic acid, and chemical processing environments.

Formability: Exhibits high ductility and elongation properties, accommodating deep drawing, bending, and roll-forming operations without cracking.

Surface Integrity: Controlled annealing and skin-pass rolling eliminate internal stress and deliver defect-free surfaces ready for mechanical polishing.

Technical Specifications

Parameter	Specification
Product Name	Precision Slit 304L Stainless Steel Strip
Material Grade	AISI 304L / EN 1.4307
UNS	S30403
Standard	ASTM A666 / EN 10088-2
Thickness	0.1–3.0 mm, subject to availability
Slit Width	Customized to requirements
Width Tolerance	According to order requirements
Surface Finish	2B, BA, No. 4, customized
Edge Condition	Slit Edge / Deburred Edge
Temper	Annealed or work-hardened, as available
Coil ID	Customized
Coil OD	Customized
Processing	Precision Slitting
Applications	Welded Components, Industrial Equipment, Fabricated Parts

Available Grades and Material Options

Standard 304L (UNS S30403 / EN 1.4307): The core baseline product with verified dual-certification to standard 304/304L upon request.

Surface Finishes:

2B: Cold-rolled, heat-treated, pickled, and skin-passed for a smooth, moderately reflective matte finish.

BA (Bright Annealed): Controlled-atmosphere bright annealed finish with high reflectivity and low surface roughness (Ra <= 0.4 um).

No. 4 / Hairline: Mechanically polished with abrasive belts for architectural and food-equipment compliance.

8K Mirror: High-clarity reflective finish processed via multi-stage abrasive buffing.

Edge Conditions: Mill Edge (ME) and Slit Edge (SE) with deburred options for automated handling.

Applications

Chemical & Petrochemical: Pressure vessel liners, storage tanks, piping supports, and reaction chamber baffles.

Food & Pharmaceutical Equipment: Fermenters, Clean-In-Place (CIP) systems, sterile transfer chutes, and mixing vessels requiring sanitary compliance.

Heat Exchangers: Plate heat exchanger panels and tubular support structures.

Semiconductor & Electronics: Ultra-clean room enclosures, exhaust ducting, and wet bench structural frames.

Architecture & Marine: Exterior cladding, fasteners, and saltwater-resistant structural panels.

Custom Thickness and Dimensions

Manufacturing lines accommodate non-standard dimension requests to match specific fabrication tooling and minimize material waste:

Custom Slitting

Widths slit down to 20 mm with edge camber control within <= 0.5 mm / 2000 mm.

Precision Blanking

Laser and shear cutting to exact rectangular, square, or custom polygonal blank dimensions.

Thickness Customization

Rolling mills adjust intermediate passes to meet specific target gauges outside standard stock tables.

Quality Control and Surface Inspection

Chemical Verification: Direct-reading optical emission spectrometry (OES) performed on every heat before rolling.

Mechanical Testing: Tensile testing, Rockwell/Brinell hardness testing, and intergranular corrosion testing (ASTM A262 Practice E) executed per lot.

Dimensional Inspection: Automated laser thickness gauges monitor continuous gauge consistency; flatbed flatness is verified via granite surface plates and feeler gauges.

Surface Flaw Detection: 100% visual inspection under calibrated lighting combined with automated surface defect scanners to detect micro-scratches, laminations, or roller marks.

Traceability: Every sheet is laser-etched or stencil-marked with heat numbers, grade, and dimensions, tied directly to the EN 10204 3.1 Material Test Certificate (MTC).

Packaging and Shipping

Export-Standard Packaging: Sheets are interleaved with waterproof paper or PVC protective film (laser-safe or deep-drawing grade) to prevent surface friction.

Skid Configuration: Secured on fumigated solid wood or moisture-resistant plywood pallets, reinforced with heavy-gauge steel strapping and edge protectors.

Container Loading: Vertical or horizontal loading inside 20GP/40GP containers, braced with wooden blocking to prevent shifting during maritime transit. Corrosion inhibitor (VCI) films and desiccant packets are included for ocean shipments.

FAQ

Q: What is the main difference between standard 304 and 304L stainless steel sheets?

A: The primary difference lies in the maximum carbon content. 304L has a carbon limit of 0.030% maximum, compared to 0.08% maximum for 304. This lower carbon content prevents chromium carbide precipitation during welding, allowing 304L to be used in the as-welded condition in corrosive environments without intergranular attack.

Q: Can you provide EN 10204 3.1 Material Test Certificates with the shipment?

A: Yes. Every shipment includes a certified EN 10204 3.1 MTC detailing exact melt chemistry, heat treatment parameters, mechanical test results, and dimensional verification data.

Q: What is the minimum order quantity (MOQ) for non-standard thicknesses or custom widths?

A: For standard stock sizes, trial orders starting from 1 metric ton are supported. For customized thicknesses, specific widths, or specialized surface finishes, the MOQ is evaluated based on rolling mill scheduling (typically starting from 3 to 5 metric tons per specification).

Q: Are the sheets protected against surface scratching during laser cutting?

A: Yes. We offer optional high-density polyethylene (HDPE) laser-cut protective films (ranging from 50 to 100 microns) that withstand thermal cutting without leaving adhesive residue on the stainless steel surface.