EN1.4307 Stainless Steel Bar(AISI 304L)

EN 1.4307 / AISI 304L Stainless Steel Bar

EN 1.4307 (widely recognized as AISI 304L or X2CrNi19-11) is an austenitic stainless steel bar featuring an ultra-low carbon content (≤0.030%). This lower carbon level effectively prevents chromium carbide precipitation during welding, providing superior resistance to intergranular corrosion without requiring post-weld heat treatment.

At Sunningsteel, we supply premium-grade EN 1.4307 stainless steel bars in various shapes, finishes, and precision tolerances, fully certified to European standards for global industrial applications.

Specification & Dimensions Table

	Round Bars	Square Bars	Hexagonal Bars	Angle Bars	Wires
Dimension	2-600mm	3-100mm	3-100mm	(20-200)*(20-200)*(2-16)mm	0.03-16mm

Available Forms & Size Range

Product Shape	Size / Diameter Range	Tolerance	Typical Application
Round Bar	Ø 3mm – Ø 500mm	h9, h10, h11, k12	Fasteners, Shafts, Valves, Machined Parts
Hexagonal Bar	S 8mm – S 60mm	h11	Nuts, Bolts, Fitting Components
Flat Bar	Width 10–150mm, Thickness 3–20mm	Standard	Brackets, Structural Trim, Flanges
Square Bar	10×10mm – 100×100mm	Standard	Frames, Support Structures

*(Note: Custom cut-to-length services and special tolerance requirements are available upon request.)*

Chemical Composition

Grade	C	Cr	Ni	Mn	Si	P	S
1.4307	0.030	17.5-19.5	8.0-10.5	2.00	1.00	0.045	0.030

Industrial Applications

• Chemical & Petrochemical: Pressure vessels, piping systems, and flange components.
• Food & Beverage Processing: Dairy equipment, brewing tanks, and conveyor systems where hygiene and weldability are critical.
• Marine & Architecture: Fasteners, handrails, and decorative hardware exposed to corrosive, moist environments.
• Mechanical Engineering: Precision shafts, pump spindles, and heavy-duty fasteners.

——Why Choose EN 1.4307(304L vs.304)?——

While standard EN 1.4301 (AISI 304) is a versatile general-purpose stainless steel, it contains up to 0.07% carbon. When subjected to welding or high-temperature fabrication, 304 can suffer from carbide precipitation, leading to intergranular corrosion.

EN 1.4307 (304L) solves this problem with its strictly controlled low carbon limit (≤ 0.030%). It guarantees long-term structural integrity and corrosion resistance in welded assemblies, making it the preferred choice for chemical tanks, food processing equipment, and pharmaceutical machinery.

——Frequently Asked Questions (FAQ)——