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316L Stainless Steel Square Pipe 30x30mm 3mm Marine Grade

China 316L Stainless Steel Square Pipe 30x30mm 3mm Marine Grade

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316L Stainless Steel Square Pipe 30x30mm 3mm Marine Grade

MOQ： 500 kgs
Price： 5-10 USD/Kg
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Payment Terms	L/C,T/T,Western Union
Supply Ability	3 Ton per week
Delivery Time	5 - 12 days based on the quantity
Packaging Details	standard packing for export
Products	Stainless Steel Square Pipe
Grade	304 316L 310S 321 2205
Diameter	DN10 - DN400
Length	6m or custom cutting any length as request
Standard	ASTM EN
Service	Cutting
Loading Port	Shanghai Port
Thickness	4.0 - 50.0mm
Brand Name	DELTA
Model Number	304 316L 310S 2205
Certification	ISO
Place of Origin	China

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Product Specification


Payment Terms	L/C,T/T,Western Union	Supply Ability	3 Ton per week
Delivery Time	5 - 12 days based on the quantity	Packaging Details	standard packing for export
Products	Stainless Steel Square Pipe	Grade	304 316L 310S 321 2205
Diameter	DN10 - DN400	Length	6m or custom cutting any length as request
Standard	ASTM EN	Service	Cutting
Loading Port	Shanghai Port	Thickness	4.0 - 50.0mm
Brand Name	DELTA	Model Number	304 316L 310S 2205
Certification	ISO	Place of Origin	China
High Light	316L stainless steel square pipe ，30x30mm marine grade pipe ，3mm thick stainless steel pipe

Corrosion Resistant 316L Stainless Steel Square Pipe 30x30mm x 3mm Marine Grade Outdoor Structural Application

Products Specification

Products Name	Stainless Steel Square Pipe
Grade:	304 304L 309S 310S 314 316L 316Ti 321 329 347H 410 2205 2507 S32760 904L 254SMO and equal grade in GB JIS EN DIN Standard
Standards:	ASTM A213M-94b ASTM A249M-94a ASTM A269-94a ASTM A312M-94b,ect.
	DIN 17456-85 DIN 17458-85 DIN 17459-92.ect
	JIS G3446-1994 JIS G3448-1997 JIS G3459-1997 JIS G3463-1994,ect.
	GB13296-1991 GB14975-2002 GB14976-2002,ect.
Size:	1010 - 400400mm
Length:	6m length or cutting any length as request
Surface	Pickling, 2B, Hairline, Bright Polished
Applications:	fluid and gas transport, structure , boiler, heat exchanger, super heater

316L stainless steel square tubes are a low-carbon variant of 316 stainless steel, renowned for exceptional corrosion resistance—especially in aggressive environments like saltwater and chemical exposures. Their square cross-section adds structural stability, making them a staple in demanding industrial and architectural applications.

What Are 316L Stainless Steel Square Tubes?

316L stainless steel square tubes are hollow, square-shaped components crafted from 316L alloy, a molybdenum-containing austenitic stainless steel. The "L" denotes low carbon (≤0.03%), which minimizes carbide precipitation during welding—critical for maintaining corrosion resistance in welded structures. This alloy bridges strength, formability, and durability, outperforming standard 304 in harsh conditions.

Chemical Composition

The precise chemistry of 316L ensures its unique properties, as defined by key standards:

Element	Content Range (%)	Role
Chromium (Cr)	16.0–18.0	Forms a passive oxide layer, resisting corrosion.
Nickel (Ni)	10.0–14.0	Enhances austenitic structure, improving ductility and toughness.
Molybdenum (Mo)	2.0–3.0	Boosts resistance to pitting and crevice corrosion (e.g., in saltwater).
Carbon (C)	≤0.03	Low carbon prevents carbide formation during welding, preserving corrosion resistance.
Manganese (Mn)	≤2.0	Aids in deoxidation and strengthens the alloy.
Silicon (Si)	≤1.0	Improves oxidation resistance at high temperatures.
Phosphorus (P)	≤0.045	Controlled to avoid brittleness.
Sulfur (S)	≤0.03	Minimized to enhance weldability.

Mechanical Properties

316L square tubes balance strength and flexibility, making them suitable for both structural and dynamic applications:

Property	Value (Typical)	Test Standard
Tensile Strength	485–620 MPa	ASTM E8 / EN 10002-1
Yield Strength (0.2% offset)	≥170 MPa	ASTM E8 / EN 10002-1
Elongation (in 50mm)	≥40%	ASTM E8 / EN 10002-1
Hardness (Brinell)	≤217 HB	ASTM E10 / EN ISO 6506-1
Modulus of Elasticity	~193 GPa	-
Density	8.0 g/cm³	-

Specifications

316L square tubes are available in a range of sizes to suit diverse needs:

Side Length: 10mm to 300mm (e.g., 25×25mm, 60×60mm, 150×150mm).
Wall Thickness: 0.8mm to 12mm (thicker walls for high-pressure or heavy-load use).
Length: Standard 6m; customizable up to 12m for large-scale projects.
Finish:
- Mill finish (2B): Smooth, for industrial use.
- Polished (BA/mirror): Reflective, for decorative applications.
- Brushed: Matte texture, common in marine or architectural trim.

Product Standards

316L square tubes comply with global standards to ensure quality and performance:

Standard	Issuing Body	Scope
ASTM A554	ASTM International	Welded stainless steel mechanical tubing
EN 10217-7	European Committee	Welded tubes for pressure (stainless steel)
JIS G3446	Japanese Industrial Standards	Stainless steel square tubes
GB/T 12771	China National Standard	Welded stainless steel pipes

Applications

316L square tubes excel in environments where corrosion resistance is non-negotiable:

Marine Engineering: Boat railings, hull supports, offshore platforms (resists saltwater).
Chemical Processing: Piping, reaction vessel frames, and storage tank components (withstands acids/alkalis).
Medical Equipment: Surgical tool frames, sterilization units (hygienic and rust-proof).
Food & Beverage: Conveyor systems, brewing equipment (easy to clean, no contamination risk).
Coastal Architecture: Outdoor handrails, facades, and sculptures (resists sea spray).
Oil & Gas: Downhole tubing, offshore rig structures (tolerates harsh drilling fluids).

Key Advantages

Superior Corrosion Resistance: Outperforms 304 in chloride-rich environments (e.g., seawater, de-icing salts) due to molybdenum.
Weldability: Low carbon content reduces carbide precipitation, ensuring welded joints retain corrosion resistance.
High-Temperature Stability: Maintains strength at temperatures up to 800°C, suitable for high-heat applications.
Longevity: With minimal maintenance, lifespan exceeds 50 years in most environments.
Hygiene: Non-porous surface resists bacterial growth, ideal for food/medical use.

Similar Grades

While 316L is unique, these grades are often compared or used as alternatives:

Grade	Key Difference from 316L	Best For
316	Higher carbon (0.08% max)	Non-welded structures; better high-temp strength.
304L	No molybdenum; lower corrosion resistance	Mild environments (e.g., indoor plumbing).
317L	Higher molybdenum (3.0–4.0%); better pitting resistance	Extreme chemical or high-salt environments.
2205	Duplex (ferritic-austenitic); higher strength	High-pressure industrial systems.

Summary: Why Choose 316L Square Tubes?

316L stainless steel square tubes stand out for their low-carbon composition, molybdenum-enhanced corrosion resistance, and structural stability. They are the go-to choice for marine, chemical, and high-humidity applications where durability and reliability are critical. Whether in industrial machinery or coastal architecture, 316L delivers performance that balances strength, longevity, and adaptability.

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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

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