304L Stainless Steel Pipe & Tube: Ultra-Low Carbon Welding-Friendly Corrosion Resistant Pipe

What is 304L Stainless Steel Pipe & Tube?

304L is the ultra-low carbon derivative of 304 stainless steel pipe, optimized for anti-intergranular corrosion, which solves the post-weld corrosion problem of 304, making it the first choice for welding-intensive piping systems in medium-corrosion environments.

Equivalent Grades (Horizontal)

UNS: S30403 | JIS: SUS304L | GB: 022Cr19Ni10 | EN: X2CrNi18-10 | W.Nr.: 1.4306

Chemical Composition (wt%, Horizontal)

C: ≤0.03 | Si: ≤1.00 | Mn: ≤2.00 | P: ≤0.045 | S: ≤0.030 | Cr: 18.00-20.00 | Ni: 8.00-12.00 | N: ≤0.10 | Fe: Balance

Key Properties (20°C, Annealed, Horizontal)

Density: 7.93g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: 485-650N/mm² | Yield Strength: ≥170N/mm² | Elongation: ≥40% | Hardness: ≤201HB

Core Characteristics

• Ultra-low carbon advantage: Eliminates post-weld intergranular corrosion, no need for post-weld annealing, boosting construction efficiency • Consistent general corrosion resistance: Matches 304 in non-severe corrosive media, suitable for medium-corrosion scenarios • Good low-temperature toughness: Stable service at -196°C without brittle fracture, adapting to low-temperature piping needs • Welding-friendly: Ideal for heat exchangers, pipeline networks and other welding-intensive structures

304L vs 304 Stainless Steel Pipe (Horizontal)

Carbon Content: 304L (≤0.03%) | 304 (≤0.08%) | Tensile Strength: 304L (485-650N/mm²) | 304 (515-690N/mm²) | Post-weld Annealing: 304L (Not needed) | 304 (Optional) | Weld Adaptability: 304L (Excellent) | 304 (General)

 

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
304	min.	-	-	-	-	-	18.0	-	8.0	-
	max.	0.08	2.0	0.75	0.045	0.030	20.0		10.5	0.10
304L	min.	-	-	-	-	-	18.0	-	8.0	-
	max.	0.030	2.0	0.75	0.045	0.030	20.0		12.0	0.10
304H	min.	0.04	-	-	-0.045	-	18.0	-	8.0	-
	max.	0.10	2.0	0.75		0.030	20.0		10.5

 

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.